May 2013
New Products Catalog
High Performance Analog ICs
LTC3300-1 High Efficiency Bidirectional Multicell Battery Balancer
LTC2314-14 14-Bit, 4.5Msps Serial Sampling ADC in TSOT
LTM8045 Inverting or SEPIC µModule DC/DC Converter with
Up to 700mA Output Current
LTC2977 8-Channel PMBus Power System Manager Featuring
Accurate Output Voltage Measurement
LTC3129 15V, 200mA Synchronous Buck-Boost DC/DC Converter
with 1.3µA Quiescent Current
LTC6957 Low Phase Noise, Dual Output Buffer/Driver/
Logic Converter
Contents
Amplifier
LTC6430-15 High Linearity Differential RF/IF Amplifier/ADC Driver .....................................................................................................................1
Battery Charger
LTC4089-3 USB Power Manager with High Voltage Switching Charger ...............................................................................................................2
Battery Management System
LTC3300-1 High Efficiency Bidirectional Multicell Battery Balancer .....................................................................................................................3
Cable Drop Compensator
LT6110 Cable/Wire Drop Compensator ................................................................................................................................................................4
Charge Pump
LTC3245 Wide VIN Range, Low Noise, 250mA Buck-Boost Charge Pump ...........................................................................................................5
Data Converters
LTC2314-14 14-Bit, 4.5Msps Serial Sampling ADC in TSOT ................................................................................................................................6
LTC2315-12 12-Bit, 5Msps Serial Sampling ADC in TSOT ...................................................................................................................................9
LTC2378-20 20-Bit, 1Msps, Low Power SAR ADC with 0.5ppm INL .................................................................................................................10
LTM9013 300MHz Digital Predistortion/Wideband Receiver ..............................................................................................................................11
Interface
LTC2862/LTC2863/LTC2864/LTC2865 ±60V Fault Protected 3V to 5.5V RS485/RS422 Transceivers with –55°C to 125°C Operating Range ........12
LDO
LT3030 Dual 750mA/250mA Low Dropout, Low Noise, Micropower Linear Regulator ......................................................................................13
LED Driver
LT3954 40VIN LED Converter with Internal PWM Generator ..............................................................................................................................14
µModule® Regulators
LTM8001 36VIN, 5A µModule Regulator with 5-Output Configurable LDO Array................................................................................................15
LTM8045 Inverting or SEPIC µModule DC/DC Converter with Up to 700mA Output Current .............................................................................16
Power System Management
LTC2977 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement ...........................................................17
Switching Regulators—Monolithic
LTC3129 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3µA Quiescent Current ....................................................................18
LTC3129-1 15V, 200mA Synchronous Buck-Boost DC/DC Converter with 1.3µA Quiescent Current .................................................................19
LTC3621/LTC3621-2 17V, 1A Synchronous Step-Down Regulator with 3.5µA Quiescent Current .....................................................................21
LTC3639 High Efficiency, 150V 100mA Synchronous Step-Down Regulator .....................................................................................................23
Contents
Switching Regulators—Controllers
LTC3859AL Triple Output, Buck/Buck/Boost Synchronous Controller with 28µA Burst Mode IQ ........................................................................24
LTC3863 60V Low IQ Inverting DC/DC Controller ...............................................................................................................................................25
LTC3890-3 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller ..........................................................................................26
Timing
LTC6957-1/LTC6957-2/LTC6957-3/LTC6957-4 Low Phase Noise, Dual Output Buffer/Driver/Logic Converter ..................................................29
LTC6995-1/LTC6995-2 TimerBlox® : Long Timer, Low Frequency Oscillator .......................................................................................................30
L, Linear Express, Linear Technology, LT, LTC, LTM, Burst Mode, FilterCAD, LTspice, OPTI-LOOP, Over-The-Top, PolyPhase, SwitcherCAD, TimerBlox, µModule and the Linear logo are registered
trademarks of Linear Technology Corporation. Adaptive Power, Bat-Track, BodeCAD, C-Load, Direct Flux Limit, DirectSense, Easy Drive, EZSync, FilterView, Hot Swap, isoSPI, LDO+, LinearView,
LTBiCMOS, LTCMOS, LTPoE++, LTpowerCAD, LTpowerPlanner, LTpowerPlay, Micropower SwitcherCAD, Multimode Dimming, No Latency ∆Σ, No Latency Delta-Sigma, No RSENSE, Operational Filter,
PanelProtect, PLLWizard, PowerPath, PowerSOT, PScope, QuikEval, RH DICE Inside, RH MILDICE Inside, SafeSlot, SmartStart, SNEAK-A-BIT, SoftSpan, Stage Shedding, Super Burst, SWITCHER+,
ThinSOT, Triple Mode, True Color PWM, UltraFast, Virtual Remote Sense, Virtual Remote Sensing, VLDO and VRS are trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Amplifier
LTC6430-15
High Linearity Differential
RF/IF Amplifier/ADC Driver
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FEATURES
DESCRIPTION
50.0dBm OIP3 at 240MHz into a 100Ω Diff Load
NF = 3.0dB at 240MHz
20MHz to 2000MHz Bandwidth
15.2dB Gain
A-Grade 100% OIP3 Tested at 240MHz
1.0nV/√Hz Total Input Noise
S11 < –15dB Up to 1.2GHz
S22 < –15dB Up to 1.2GHz
>2.75VP-P Linear Output Swing
P1dB = 24.0dBm
Insensitive to VCC Variation
100Ω Differential Gain-Block Operation
Input/Output Internally Matched to 100Ω Diff
Single 5V Supply
DC Power = 800mW
Unconditionally Stable
4mm × 4mm, 24-Lead QFN Package
The LTC®6430-15 is a differential gain block amplifier designed to
drive high resolution, high speed ADCs with excellent linearity beyond
1000MHz and with low associated output noise. The LTC6430-15
operates from a single 5V power supply and consumes only 800mW.
In its differential configuration, the LTC6430-15 can directly drive the
differential inputs of an ADC. Using 1:2 baluns, the device makes
an excellent 50Ω wideband balanced amplifier. While using 1:1.33
baluns, the device makes a high fidelity 50MHz to 1000MHz 75Ω
CATV amplifier.
The LTC6430-15 is designed for ease of use, requiring a minimum
of support components. The device is internally matched to 100Ω
differential source/load impedance. On-chip bias and temperature
compensation ensure consistent performance over environmental
changes.
The LTC6430-15 uses a high performance SiGe BiCMOS process
for excellent repeatability compared with similar GaAs amplifiers. All
A-grade LTC6430-15 devices are tested and guaranteed for OIP3
at 240MHz. The LTC6430-15 is housed in a 4mm × 4mm, 24-lead,
QFN package with an exposed pad for thermal management and
low inductance. For a single-ended 50Ω IF gain block with similar
performance, see the related LTC6431-15.
APPLICATIONS
OIP3 vs Frequency
50
48
DNC
DNC
DNC
VCC
TOP VIEW
46
DNC 1
18 +OUT
DNC 2
17 GND
DNC 3
16 T_DIODE
25
GND
DNC 4
14 GND
DNC 6
13 –OUT
42
VCC = 5V
POUT = 2dBm/TONE
ZIN = ZOUT = 100Ω DIFF.
TA = 25°C
38
36
DNC
9 10 11 12
DNC
8
44
40
15 DNC
DNC 5
7
OIP3 (dBm)
24 23 22 21 20 19
DNC
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GND
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VCC
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+IN
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–IN
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Differential ADC Driver
Differential IF Amplifier
OFDM Signal Chain Amplifier
50Ω Balanced IF Amplifier
75Ω CATV Amplifier
700MHz to 800MHz LTE Amplifier
GND
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UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
LTC6430AIUF-15
LTC6430BIUF-15
0
200
400
600
800
FREQUENCY (MHz)
1000
1200
643015 TA01b
Differential 16-Bit ADC Driver
5V
VCM
RF
CHOKES
VCC = 5V
1:2
BALUN
ADC
LTC6430-15
50Ω
RSOURCE = 100Ω
DIFFERENTIAL
RLOAD = 100Ω
DIFFERENTIAL
FILTER
643015 TA01a
1
Battery Charger
LTC4089-3
USB Power Manager with
High Voltage Switching Charger
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FEATURES
DESCRIPTION
Seamless Transition Between Power Sources: Li-Ion Battery,
USB and 6V to 36V External Supply
High Efficiency 1.2A Charger from 6V to 36V Input with
Adaptive Output Control
3.95V Float Voltage Improves Battery Lifespan and High
Temperature Safety Margin
Load Dependent Charging from USB Input Guarantees
Current Compliance
215m Internal Ideal Diode plus Optional External Ideal
Diode Controller Provides Low Loss Power Path When
External Supply/USB Not Present
Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate without Risk of Overheating
Selectable 100% or 20% Current Limit (e.g., 500mA/100mA)
from USB Input
Preset 3.95V Charge Voltage with ±0.8% Accuracy
C/10 Charge Current Detection Output
NTC Thermistor Input for Temperature Qualified Charging
Tiny (6mm × 3mm × 0.75mm) 22-Lead DFN Package
The LTC®4089-3 is a USB power manager plus high voltage Li-Ion
battery charger. This device controls the total current used by the
USB peripheral for operation and battery charging. Battery charge
current is automatically reduced such that the sum of the load
current and the charge current does not exceed the programmed
input current limit. The LTC4089-3 also accommodates high voltage
power supplies, such as 12V AC/DC wall adapters, Firewire, or
automotive power.
The LTC4089-3 provides an adaptive output that tracks the battery
voltage for high efficiency charging from the high voltage input.
This 3.95V version of the the standard LTC4089 is intended for
applications which have extended battery lifetime requirements or
those that require high temperature (approximately >60°C) operation
or storage. Under these conditions, a reduced float voltage will
trade off initial cell capacity for the benefit of increased capacity
retention over the life of the battery. The charge current is
programmable and an end-of-charge status output (CHRG)
indicates full charge. Also featured are programmable total charge
time, an NTC thermistor input used to monitor battery temperature
while charging and automatic recharging of the battery.
APPLICATIONS
Portable USB Devices—GPS Receivers, Cameras, MP3 Players,
PDAs
LTC4089 High Voltage
Battery Charger Efficiency
TOP VIEW
GND
1
22 HVEN
GND
2
21 HVIN
HVOUT
3
20 BOOST
VC
4
19 SW
NTC
5
18 HVOUT
VNTC
6
HVPR
7
16 SUSP
CHRG
8
15 HPWR
PROG
9
14 CLPROG
23
GATE 10
BAT 11
90
CC CURRENT = 970mA
85 NO OUTPUT LOAD
FIGURE 10 SCHEMATIC
80 WITH R
PROG = 52k
EFFICIENCY (%)
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17 TIMER
75
70
65
60
55
HVIN = 8V
HVIN = 12V
HVIN = 24V
HVIN = 36V
50
13 OUT
45
12 IN
40
DJC
DJC PACKAGE
PACKAGE
22-LEAD(6mm
(6mm × 3mm)
22-LEAD
3mm)PLASTIC
PLASTICDFN
DFN
40893 TA01b
LTC4089EDJC-3
0.1µF
HIGH (6V-36V)
VOLTAGE INPUT
5V (NOM)
FROM USB
CABLE VBUS
4.5
3.5
3
4
BATTERY VOLTAGE (V)
2.5
HVIN
1µF
10µH
SW
BOOST
10µF
HVEN
HVOUT
IN
4.7µF
HVPR
1k
LTC4089-3
OUT
4.7µF
TIMER
0.1µF
BAT
CLPROG GND PROG
2k
100k
+
Li-Ion BATTERY
TO LDOs
REGS, ETC.
VOUT (TYP)
VBAT + 0.3V
5V
VBAT
AVAILABLE INPUT
HV INPUT
USB ONLY
BAT ONLY
40893 TAO1a
2
Protected by U.S. Patents, including 6522118, 6700364, 7733061.
Battery Management System
LTC3300-1
High Efficiency Bidirectional
Multicell Battery Balancer
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FEATURES
DESCRIPTION
Bidirectional Synchronous Flyback Balancing
of Up to 6 Li-Ion or LiFePO4 Cells in Series
Up to 10A Balancing Current (Set by External Components)
Bidirectional Architecture Minimizes Balancing Time and
Power Dissipation
Up to 92% Charge Transfer Efficiency
Stackable Architecture Enables >1000V Systems
Uses Simple 2-Winding Transformers
1MHz Daisy-Chainable Serial Interface with 4-Bit
CRC Packet Error Checking
High Noise Margin Serial Communication
Numerous Fault Protection Features
48-Lead Exposed Pad QFN and LQFP Packages
The LTC®3300-1 is a fault-protected controller IC for transformerbased bidirectional active balancing of multicell battery stacks.
All associated gate drive circuitry, precision current sensing,
fault detection circuitry and a robust serial interface with built-in
watchdog timer are integrated.
APPLICATIONS
When multiple LTC3300-1 devices are connected in series they
can operate simultaneously, permitting all cells in the stack to be
balanced concurrently and independently. Fault protection features
include readback capability, cyclic redundancy check (CRC) error
detection, maximum on-time volt-second clamps, and overvoltage
shutoffs.
Balancer Efficiency
CHARGE TRANSFER EFFICIENCY (%)
100
High Efficiency Bidirectional Balancing
DC2064A DEMO BOARD
ICHARGE = IDISCHARGE = 2.5A
VCELL = 3.6V
NEXT CELL ABOVE
CHARGE
SUPPLY
(ICHARGE 1-6)
95
CHARGE
DISCHARGE
90
+
CHARGE
RETURN
(IDISCHARGE 1-6)
•
85
CHARGE
RETURN
CELL 12
LTC3300-1
IDISCHARGE
+
6
SERIAL
DATA OUT
TO LTC3300-1
ABOVE
CELL 7
CELL 6
•
80
3
3
+
3
8
10
12
NUMBER OF CELLS (SECONDARY SIDE)
33001 TA01b
49
V–
LXE PACKAGE
PACKAGE
LXE
48-LEAD
(7mm ×× 7mm)
7mm) PLASTIC
LQFP
48-LEAD
(7mm
PLASTIC
LQFP
LTC3300ILXE-1
LTC3300HLXE-1
48 VREG
47 TOS
46 VMODE
45 CSBO
44 SCKO
43 SDOI
42 BOOST
41 BOOST–
40 BOOST+
39 C6
38 G6P
37 I6P
CHARGE
SUPPLY
36
35
34
33
32
31
30
29
28
27
26
25
C5
G5P
I5P
C4
G4P
I4P
C3
G3P
I3P
C2
G2P
I2P
G6S 1
I6S 2
G5S 3
I5S 4
G4S 5
I4S 6
G3S 7
I3S 8
G2S 9
I2S 10
G1S 11
I1S 12
49
V–
ICHARGE
+
CELL 1
•
36 C5
35 G5P
34 I5P
33 C4
32 G4P
31 I4P
30 C3
29 G3P
28 I3P
27 C2
26 G2P
25 I2P
3
SERIAL
DATA IN
FROM
LTC3300-1
BELOW
33001 TA01a
NEXT CELL BELOW
RTONS 13
RTONP 14
CTRL 15
CSBI 16
SCKI 17
SDI 18
SDO 19
WDT 20
V– 21
I1P 22
G1P 23
C1 24
G6S 1
I6S 2
G5S 3
I5S 4
G4S 5
I4S 6
G3S 7
I3S 8
G2S 9
I2S 10
G1S 11
I1S 12
LTC3300-1
•
TOP VIEW
TOP VIEW
VREG
TOS
VMODE
CSBO
SCKO
SDOI
BOOST
BOOST–
BOOST+
C6
G6P
I6P
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47
46
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42
41
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39
38
37
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Electric Vehicles/Plug-in HEVs
High Power UPS/Grid Energy Storage Systems
General Purpose Multicell Battery Stacks
RTONS 13
RTONP 14
CTRL 15
CSBI 16
SCKI 17
SDI 18
SDO 19
WDT 20
V– 21
I1P 22
G1P 23
C1 24
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Each LTC3300-1 can balance up to 6 series-connected battery cells
with an input common mode voltage up to 36V. Charge from any
selected cell can be transferred at high efficiency to or from 12 or
more adjacent cells. A unique level-shifting SPI-compatible serial
interface enables multiple LTC3300-1 devices to be connected in
series, without opto-couplers or isolators, allowing for balancing of
every cell in a long string of series-connected batteries.
UK
UK PACKAGE
PACKAGE
48-LEAD
(7mm
7mm)PLASTIC
PLASTIC
48-LEAD
(7mm ×× 7mm)
QFNQFN
LTC3300IUK-1
LTC3300HUK-1
3
Cable Drop Compensator
LT6110
Cable/Wire Drop Compensator
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FEATURES
DESCRIPTION
Improve Voltage Regulation to a Remote Load by 10×
Ideal for Resistor-Adjustable Voltage Regulators
Gain Configurable with a Single Resistor
High Side Current Sensing:
Integrated 20mΩ Sense Resistor for Up to 3A
Ability to Use an External Sense Resistor
300µV Maximum Input Offset Voltage
Output Current Accuracy of 1% Maximum
30µA Maximum Supply Current
2V to 50V Supply Range
Fully Specified from –40°C to 125°C
Available in Low Profile (1mm) ThinSOT™ and
(2mm × 2mm) DFN Packages
The LT®6110 is a precision high side current sense with a current
mode output, designed for controlling the output voltage of an
adjustable power supply or voltage regulator. This can be used to
compensate for drops in voltage at a remote load due to resistance
in a wire, trace or cable.
The LT6110 monitors load current via a series-connected internal or
external sense resistor. Two current mode outputs, one sinking and
one sourcing, are provided that are proportional to the load current.
This allows the LT6110 to adjust the output voltage of a wide variety
of regulators. Either output may be used to monitor the load current.
Low DC offset allows for the use of a small sense resistor, as well as
precise control of small variations in wire voltage drop.
APPLICATIONS
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Automotive and Industrial Power Distribution
USB Power
DC/DC Converters
Plug-In DC Adapters
Power over Ethernet
TOP VIEW
TOP VIEW
+IN 1
8 NC*
V+ 2
7 IOUT
RS 3
9
V–
NC* 1
IOUT 2
IMON 3
V– 4
6 IMON
5 V–
–IN 4
TS8
TS8 PACKAGE
PACKAGE
8-LEAD PLASTIC
PLASTIC TSOT-23
TSOT-23
8-LEAD
LT6110ITS8
LT6110HTS8
DC PACKAGE
8-LEAD (2mm × 2mm) PLASTIC DFN
LT6110IDC
LT6110HDC
VIN
IN
OUT
REGULATOR
8 +IN
7 V+
6 RS
5 –IN
RWIRE
ILOAD
VREG
VLOAD
RIN
FB
+IN V+
RS
–IN
IOUT
LT6110
+ –
VLOAD UNCOMPENSATED
5V
2A
IMON
V–
REMOTE
LOAD
5V
GND
500mV/DIV
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1A
VLOAD COMPENSATED
ILOAD
200µs/DIV
4
6110 TA01
Charge Pump
LTC3245
Wide VIN Range, Low Noise,
250mA Buck-Boost Charge Pump
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FEATURES
DESCRIPTION
2.7V to 38V VIN Range
IQ = 18µA Operating; 4μA in Shutdown
12V to 5V Efficiency = 81%
Multimode Operation (2:1, 1:1, 1:2) with Automatic
Mode Switching
Low Noise, Constant Frequency Operation
Pin Selectable Burst Mode® Operation
VOUT: Fixed 3.3V, 5V or Adjustable (2.5V to 5V)
IOUT Up to 250mA
Overtemperature and Short-Circuit Protection
Operating Junction Temperature: 150°C Maximum
Thermally Enhanced 12-Pin MSOP and Low Profile
12-Pin (3mm × 4mm) DFN Packages
The LTC®3245 is a switched capacitor buck-boost DC/DC converter
that produces a regulated output (3.3V, 5V or adjustable) from a
2.7V to 38V input. The device uses switched capacitor fractional
conversion to maintain regulation over a wide range of input voltage.
Internal circuitry automatically selects the conversion ratio to
optimize efficiency as input voltage and load conditions vary. No
inductors are required.
The unique constant frequency architecture provides a lower noise
output than conventional charge pump regulators. To optimize
efficiency at the expense of slightly higher output ripple, the device
has pin selectable Burst Mode operation.
Low operating current (20μA with no load, 4μA in shutdown) and
low external parts count (three small ceramic capacitors) make
the LTC3245 ideally suited for low power, space constrained
automotive/industrial applications. The device is short-circuit and
overtemperature protected, and is available in thermally enhanced
12-pin MSOP and low profile 3mm × 4mm 12-pin DFN packages.
APPLICATIONS
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Automotive ECU/CAN Transceiver Supplies
Industrial Housekeeping Supplies
Low Power 12V to 5V Conversion
VIN
2
VIN
3
BURST
4
SEL1
SEL2
–
11 C
13
GND
10 VOUT
9
C+
5
8
PGOOD
6
7
OUTS/ADJ
1
2
3
4
5
6
12
11
10
9
8
7
13
GND
GND
C–
VOUT
C+
PGOOD
OUTS/ADJ
MSE PACKAGE
12-LEAD PLASTIC MSOP
LTC3245EMSE
LTC3245IMSE
LTC3245HMSE
DE PACKAGE
12-LEAD (3mm × 4mm) PLASTIC DFN
LTC3245EDE
LTC3245IDE
90
400
VIN = 12V
80
350
EFFICIENCY
70
300
60
250
50
200
40
150
PLOSS
30
PLOSS (mW)
VIN
VIN
VIN
VIN
BURST
SEL1
SEL2
12 GND
1
5VOUT Efficiency vs Output Current
TOP VIEW
TOP VIEW
EFFICIENCY (%)
n
100
20
50
10
0.1
1
10
IOUT (mA)
100
0
1000
3245 TA01b
Efficient Regulated 5V Output
1µF
C+
C–
LTC3245
VIN
VIN = 2.7V TO 38V
1µF
SEL2
BURST
SEL1
VOUT
OUTS/ADJ
PGOOD
500k
VOUT = 5V
IOUT UP TO 250mA
10µF
GND
3245 TA01a
5
Data Converters
LTC2314-14
14-Bit, 4.5Msps Serial Sampling ADC in TSOT
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FEATURES
DESCRIPTION
4.5Msps Throughput Rate
Guaranteed 14-Bit No Missing Codes
Internal Reference: 2.048V/4.096V Span
Low Noise: 77.5dB SNR
Low Power: 6.2mA at 4.5Msps and 5V
Dual Supply Range: 3V/5V operation
Sleep Mode with < 1µA Typical Supply Current
Nap Mode with Quick Wake-up < 1 conversion
Separate 1.8V to 5V Digital I/O Supply
High Speed SPI-Compatible Serial I/O
Guaranteed Operation from –40°C to 125°C
8-Lead TSOT-23 Package
The LTC®2314-14 is a 14-bit, 4.5Msps, serial sampling A/D
converter that draws only 6.2mA from a wide range analog supply
adjustable from 2.7V to 5.25V. The LTC2314-14 contains an
integrated bandgap and reference buffer which provide a low cost,
high performance (20ppm/°C max) and space saving applications
solution. The LTC2314-14 achieves outstanding AC performance
of 77dB SINAD and –85dB THD while sampling a 500kHz input
frequency. The extremely high sample rate-to-power ratio makes
the LTC2314-14 ideal for compact, low power, high speed systems.
The LTC2314-14 also provides both nap and sleep modes for
further optimization of the device power within a system.
The LTC2314-14 has a high speed SPI-compatible serial interface
that supports 1.8V, 2.5V, 3V and 5V logic. The fast 4.5Msps
throughput makes the LTC2314-14 ideally suited for a wide variety
of high speed applications.
APPLICATIONS
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Communication Systems
High Speed Data Acquisition
Handheld Terminal Interface
Medical Imaging
Uninterrupted Power Supplies
Battery Operated Systems
Automotive
fS = 4.5Msps, fIN = 500kHz 32k-pt FFT
0
–40
TOP VIEW
VDD
REF
GND
AIN
1
2
3
4
VDD = 5V
SNR = 77.5dBFS
SINAD = 76.9dBFS
THD = 84.9dB
SFDR = 88.1dB
–20
AMPLITUDE (dBFS)
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8
7
6
5
CS
SCK
SDO
OVDD
–60
–80
–100
–120
TS8
TS8 PACKAGE
PACKAGE
8-LEAD
8-LEAD PLASTIC
PLASTIC TSOT-23
TSOT-23
LTC2314CTS8-14
LTC2314ITS8-14
LTC2314HTS8-14
–160
–140
0
250 500 750 1000 1250 1500 1750 2000 2250
FREQUENCY (kHz)
5V Supply, Internal Reference, 4.5Msps, 14-Bit Sampling ADC
5V
2.2µF
LTC2314-14
VDD
CS
REF
SCK
GND
SDO
2.2µF
ANALOG INPUT
0V TO 4.096V
AIN
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
OVDD
2.2µF
DIGITAL OUTPUT SUPPLY
1.8V TO 5V
231414 TA01
6
231414 TA01a
14-Bit 4.5Msps SAR ADC
20ppm/°C Max Integrated Reference in 8mm2 TSOT
The LTC®2314-14 leads a family of highly integrated 14-/12-bit SAR ADCs from 500ksps to 5Msps. Available in tiny 8-lead TSOT-23
packages, these ADCs integrate a precision bandgap reference with guaranteed 20ppm/ºC maximum temperature coefficient
and an internal reference buffer into an 8mm2 footprint, saving space in high density designs. They offer the flexibility of 3V or 5V
supply operation and low power consumption, including nap and sleep modes.
32k Point FFT, fS = 4.5Msps, fIN = 500kHz
Features
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Up to 5Msps Throughput Rate
77.5dB SNR, –85dB THD (14 Bits)
±3.75LSB INL Max, ±0.99LSB DNL Max (14 Bits)
Internal Reference: 20ppm/°C Max, 2.048V/4.096V Span
Low Power: 31mW at 4.5Msps and 5V
Flexible Supply Range: 3V or 5V Operation
Guaranteed Operation from –40°C to 125°C
8-Lead TSOT-23 Package
0
VDD = 5V
SNR = 77.5dBFS
SINAD = 76.9dBFS
THD = 84.9dB
SFDR = 88.1dB
–20
–40
AMPLITUDE (dBFS)
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–60
–80
–100
–120
–160
–140
0
250 500 750 1000 1250 1500 1750 2000 2250
FREQUENCY (kHz)
Complete 14-Bit/12-Bit Pin Compatible SAR ADC Family
500ksps
2.5Msps
4.5Msps
2314-14
14-Bit
2312-14
2313-14
12-Bit
2312-12
2313-12
Power
Consumption 8mW/14mW
3V/5V
14mW/26mW
5Msps
2315-12
18mW/31mW
L, LT, LTC, LTM, Linear Technology and the Linear logo are
registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
19mW/32mW
General Purpose SAR ADCs
8-Bit to 14-Bit Resolution, 6ksps to 5Msps
Resolution
Channels
6.6ksps to 75ksps
100ksps to 210ksps
250ksps to 450ksps
500ksps to 800ksps
1Msps
1.25Msps to
1.6Msps
2Msps to 2.8Msps
2313-14
1-Ch
2312-14
1416
6-Ch
1855
1403A
1403A-1
1414
1411
1-Ch
2361
2301
1286
1401
1285
2355-14
2356-14
1407A
1407A-1
2351-14
1858
2360
1860L
1400
1860
2362
2312-12
1404
1409
2313-12
2365
2302
1410
1402
1415
1403
2306
2315-12
2366
1412
1403-1
2355-12
2356-12
1407
1407-1
1288
1298
1594
1594L
1861L
1861
6-Ch
4-Ch
2-Ch
2305
12-Bit
1419
1408-14
8-Ch
14-Bit
1417
4.5Msps to 5Msps
2314-14
2-Ch
1418
3Msps to 3.5Msps
1408-12
1290
1854
1857
1598
1598L
1863L
1863
2308
1-Ch
2-Ch
1199L
1851
1197
1199
8-Ch
1093
1197L
1094
1090
1852
1-Ch
8-Bit
1091
1853
1096L
1096
1099
2-Ch
10-Bit
1092
6-Ch
8-Ch
2309
2351-12
1098L
1098
1850
1196
1198
Serial
Parallel
3V/5V Supply µPower
ADCs
3V Pin Compatible ADCs in
TSOT-6/-8 Packages
5V I2C ADCs in Tiny
DFN/QFN
5V SPI ADCs in Tiny
DFN/QFN
Serial SPI/Parallel
Interface
±10V Bipolar
Input ADCs
Simultaneous
Sampling ADCs
0V to 2.048V Input,
ADC in SO-8
0V to 5V Input, 5V Supply
ADCs in PDIP-8 Package
3V/5V Supply Pin Compatible
ADCs in TSOT-8 Package
0V to 4.096V, ±2.048V Unipolar/Bipolar
Inputs with 5V, ±5V Supply
0V to 5V, ±5V Unipolar/Bipolar
Inputs with 5V, ±5V Supply
0V to 2.5V, ±1.25V
Unipolar/Bipolar
3V/5V Supply Pin
Compatible ADCs
4.096V/±4.096V Unipolar or Bipolar
Inputs with Single ±5V Supply
3V/5V Supply
µPower ADCs
Serial SPI/Parallel
Interface
0V to 5V Input, 5V Supply
ADC in N-20, SW-20 Package
±2.5V Bipolar Inputs
with Single ±5V Supply
±1.8V SoftSpan™ Input
with 5V Supply
www.linear.com/2314 n 1-800-4-LINEAR
0213
Data Converters
LTC2315-12
12-Bit, 5Msps Serial Sampling ADC in TSOT
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FEATURES
DESCRIPTION
5Msps Throughput Rate
Guaranteed 12-Bit No Missing Codes
Internal Reference: 2.048V/4.096V Span
Low Noise: 73dB SNR
Low Power: 6.4mA at 5Msps and 5V
Dual Supply Range: 3V/5V Operation
Sleep Mode with < 1µA Typical Supply Current
Nap Mode with Quick Wake-Up < 1 Conversion
Separate 1.8V to 5V Digital I/O Supply
High Speed SPI-Compatible Serial I/O
Guaranteed Operation from –40°C to 125°C
8-Lead TSOT-23 Package
The LTC®2315-12 is a 12-bit, 5Msps, serial sampling A/D converter
that draws only 6mA from a wide range analog supply adjustable
from 2.7V to 5.25V. The LTC2315-12 contains an integrated
bandgap and reference buffer which provide a low cost, high
performance (20ppm/°C max) and space saving applications
solution. The LTC2315-12 achieves outstanding AC performance
of 72.6dB SINAD and –84dB THD while sampling a 500kHz input
frequency. The extremely high sample rate-to-power ratio makes
the LTC2315-12 ideal for compact, low power, high speed systems.
The LTC2315-12 also provides both nap and sleep modes for
further optimization of the device power within a system.
The LTC2315-12 has a high speed SPI-compatible serial interface
that supports 1.8V, 2.5V, 3V and 5V logic. The fast 5Msps
throughput makes the LTC2315-12 ideally suited for a wide variety
of high speed applications.
APPLICATIONS
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Communication Systems
High Speed Data Acquisition
Handheld Terminal Interface
Medical Imaging
Uninterrupted Power Supplies
Battery Operated Systems
Automotive
fS = 5Msps, fIN = 500kHz 16k-pt FFT
0
TOP VIEW
VDD
REF
GND
AIN
1
2
3
4
VDD = 5V
SNR = 73.1dBFS
SINAD = 72.6dBFS
THD = –84dB
SFDR = 87dBc
–20
AMPLITUDE (dBFS)
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7
6
5
CS
SCK
SDO
OVDD
TS8
TS8 PACKAGE
PACKAGE
8-LEAD
8-LEAD PLASTIC
PLASTIC TSOT-23
TSOT-23
LTC2315CTS8-12
LTC2315ITS8-12
LTC2315HTS8-12
–40
–60
–80
–100
–120
–140
0
500
1000
2000
1500
FREQUENCY (kHz)
2500
231512 TA01a
5V Supply, Internal Reference, 5Msps, 12-Bit Sampling ADC
5V
2.2µF
LTC2315-12
VDD
CS
REF
SCK
GND
SDO
2.2µF
ANALOG INPUT
0V TO 4.096V
AIN
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
OVDD
2.2µF
DIGITAL OUTPUT SUPPLY
1.8V TO 5V
231512 TA01
9
Data Converters
LTC2378-20
20-Bit, 1Msps, Low Power
SAR ADC with 0.5ppm INL
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FEATURES
DESCRIPTION
1Msps Throughput Rate
±0.5ppm INL (Typ)
Guaranteed 20-Bit No Missing Codes
Low Power: 21mW at 1Msps, 21µW at 1ksps
104dB SNR (Typ) at fIN = 2kHz
–125dB THD (Typ) at fIN = 2kHz
Digital Gain Compression (DGC)
Guaranteed Operation to 85°C
2.5V Supply
Fully Differential Input Range ±VREF
VREF Input Range from 2.5V to 5.1V
No Pipeline Delay, No Cycle Latency
1.8V to 5V I/O Voltages
SPI-Compatible Serial I/O with Daisy-Chain Mode
Internal Conversion Clock
16-Lead MSOP and 4mm × 3mm DFN Packages
The LTC®2378-20 is a low noise, low power, high speed 20-bit
successive approximation register (SAR) ADC. Operating from a
2.5V supply, the LTC2378-20 has a ±VREF fully differential input
range with VREF ranging from 2.5V to 5.1V. The LTC2378-20
consumes only 21mW and achieves ±2ppm INL maximum, no
missing codes at 20 bits with 104dB SNR.
The LTC2378-20 has a high speed SPI-compatible serial interface
that supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring
a daisy-chain mode. The fast 1Msps throughput with no cycle
latency makes the LTC2378-20 ideally suited for a wide variety of
high speed applications. An internal oscillator sets the conversion
time, easing external timing considerations. The LTC2378-20
automatically powers down between conversions, leading to
reduced power dissipation that scales with the sampling rate.
The LTC2378-20 features a unique digital gain compression (DGC)
function, which eliminates the driver amplifier’s negative supply
while preserving the full resolution of the ADC. When enabled, the
ADC performs a digital scaling function that maps zero-scale code
from 0V to 0.1 • VREF and full-scale code from VREF to 0.9 • VREF. For
a typical reference voltage of 5V, the full-scale input range is now
0.5V to 4.5V, which provides adequate headroom for powering the
driving amplifier from a single 5.5V supply.
APPLICATIONS
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Integral Nonlinearity vs Output Code
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Medical Imaging
High Speed Data Acquisition
Portable or Compact Instrumentation
Industrial Process Control
Low Power Battery-Operated Instrumentation
Automatic Test Equipment
2.0
TOP VIEW
TOP VIEW
1
VDD
2
GND
3
+
4
IN–
5
GND
6
REF
7
REF/DGC
8
IN
CHAIN
VDD
GND
IN+
IN–
GND
REF
REF/DGC
16 GND
15 OVDD
14 SDO
13 SCK
17
GND
12 RDL/SDI
11 BUSY
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
OVDD
SDO
SCK
RDL/SDI
BUSY
GND
CNV
1.5
1.0
INL ERROR (ppm)
CHAIN
MS PACKAGE
16-LEAD PLASTIC MSOP
LTC2378CMS-20
LTC2378IMS-20
10 GND
9 CNV
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
0.5
0
–0.5
–1.0
–1.5
LTC2378CDE-20
LTC2378IDE-20
–2.0
0
262144
524288
786432
OUTPUT CODE
1048576
237820 TA02
2.5V
1.8V TO 5V
10µF
VREF
0V
VREF
0V
+
10Ω
6800pF
10Ω
OVDD
VDD
IN+
LTC2378-20
3300pF
–
0.1µF
IN–
6800pF
REF
GND
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
REF/DGC
2.5V TO 5.1V
SAMPLE CLOCK
VREF
237820 TA01
47µF
(X7R, 1210 SIZE)
10
Protected by U.S. Patents, including 7705765.
Data Converters
LTM9013
300MHz Digital Predistortion/Wideband Receiver
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FEATURES
DESCRIPTION
Integrated I/Q Demodulator, IF Amplifier, and Dual 14-Bit,
310Msps High Speed ADC
External Highpass Filter Allows Bandwidth Adjustment
300MHz Lowpass Filter for Each Channel
RF Input Frequency Range: 0.7GHz to 4GHz
50Ω Single-Ended RF Port
50Ω Differential LO Port
Frequency Flatness: 1.3dB Typical
66dBc IM3 Level at –7dBFS
59dB SNR at –1dBFS
Parallel DDR LVDS Outputs
Clock Duty Cycle Stabilizer
Low Power: 2.6W
Shutdown and Nap Modes
15mm × 15mm BGA Package
The LTM®9013 is a 300MHz digital predistortion receiver. Utilizing
an integrated system in a package (SiP) technology, it is a μModule®
(micromodule) receiver that includes a dual high speed 14-bit A/D
converter, lowpass filter, differential gain stages and a quadrature
demodulator.
The LTM9013 is perfect for digital predistortion applications, with
AC performance that includes 59dB SNR and 1.3dB frequency
flatness from DC to 300MHz. A highpass filter or simple AC coupling
are used external to the device for design flexiblity. The integrated
on-chip broadband transformers provide a 50Ω single-ended
interface at the RF input.
A 5V supply powers the demodulator and a 3.3V supply powers the
IF amplifiers for minimal distortion. A 1.8V supply allows low power
ADC operation. A separate output supply allows the DDR LVDS
outputs to drive 1.8V logic. An optional multiplexer allows both
channels to share a digital output bus. An optional clock duty cycle
stabilizer allows high performance at full speed for a wide range of
clock duty cycles.
APPLICATIONS
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Telecommunications
Wideband, Low IF Receivers
Digital Predistortion Receivers
Cellular Base Stations
64k Point FFT
fIN = 1950MHz, –1dBFS
0
–10
1
2
3
4
5
6
TOP VIEW
7 8 9
–20
–30
10 11 12 13 14
AMPLITUDE (dBFS)
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A
B
C
D
–40
–50
–60
–70
–80
–90
E
–100
F
–110
G
–120
H
J
0
16 32 48 64 80 96 112 128 144 160
FREQUENCY (MHz)
9013 TA01b
K
L
100Ω
M
5V
N
VCC1
5V
P
100Ω
LTM9013
BGAPACKAGE
PACKAGE
BGA
196-LEAD
(15mm×× 15mm
15mm × ×
2.82mm)
196-LEAD
(15mm
2.82mm)
15nH
0.01µF
6.8pF
15nH
0.01µF
VDD
1.8V
VCC2
3.3V
GAIN_Q GAIN_I
OVDD
1.8V
LTM9013CY-AA
LTM9013IY-AA
ADC
CLKOUT
0°
LNA
90°
ADC CLK
OF
ADC
GND
SCK CS
SDI SDO
GND
PAR/SER
9013 TA01
LO IN
100Ω
5V
100Ω
15nH
0.01µF
6.8pF
15nH
0.01µF
11
Interface
LTC2862/LTC2863/LTC2864/LTC2865
±60V Fault Protected 3V to 5.5V RS485/RS422
Transceivers with –55°C to 125°C Operating Range
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FEATURES
DESCRIPTION
Protected from Overvoltage Line Faults to ±60V
3V to 5.5V Supply Voltage
20Mbps or Low EMI 250kbps Data Rate
±15kV ESD Interface Pins, ±8kV All Other Pins
Extended Common Mode Range: ±25V
Guaranteed Failsafe Receiver Operation
High Input Impedance Supports 256 Nodes
1.65V to 5.5V Logic Supply Pin (VL) for Flexible
Digital Interface (LTC2865)
H-Grade Option Available (–40°C to 125°C)
Fully Balanced Differential Receiver Thresholds for Low Duty
Cycle Distortion
Current Limited Drivers and Thermal Shutdown
Pin Compatible with LT1785 and LT1791
Available in DFN and Leaded Packages
The LTC®2862/LTC2863/LTC2864/LTC2865 are low power, 20Mbps
or 250kbps RS485/RS422 transceivers operating on 3V to 5.5V
supplies that feature ±60V overvoltage fault protection on the data
transmission lines during all modes of operation, including powerdown. Low EMI slew rate limited data transmission is available in
a logic-selectable 250kbps mode in the LTC2865 and in 250kbps
versions of the LTC2862-LTC2864. Enhanced ESD protection allows
these parts to withstand ±15kV HBM on the transceiver interface
pins without latchup or damage.
Extended ±25V input common mode range and full failsafe
operation improve data communication reliability in electrically noisy
environments and in the presence of large ground loop voltages.
LTC2864
APPLICATIONS
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Supervisory Control and Data Acquisition (SCADA)
Industrial Control and Instrumentation Networks
Automotive and Transportation Electronics
Building Automation, Security Systems and HVAC
Medical Equipment
Lighting and Sound System Control
LTC2862
VCC
RE 2
7
B
DE 3
6
A
DI 4
5
GND
S8 PACKAGE
PACKAGE
S8
8-LEAD(150mil)
(150mil) PLASTIC
SO SO
8-LEAD
PLASTIC
TJMAX = 150°C, θJA = 150°C/W, θJC = 39°C/W
LTC2862CS8-1
LTC2862IS8-1
LTC2862HS8-1
LTC2862CS8-2
LTC2863
LTC2862IS8-2
LTC2862HS8-2
LTC2682MPS8-1
LTC2862MPS8-2
RO
1
RE
2
DE
3
DI
4
7 B
A
RO 2
7
B
DI 3
6
Z
GND 4
5
Y
S8 PACKAGE
PACKAGE
S8
8-LEAD(150mil)
(150mil) PLASTIC
SO SO
8-LEAD
PLASTIC
TJMAX = 150°C, θJA = 150°C/W, θJC = 39°C/W
LTC2863IS8-2
LTC2863HS8-2
LTC2863MPS8-1
LTC2863MPS8-2
5 GND
EXPOSED PAD (PIN 9) CONNECT TO PCB GND
θJC = 3°C/W
LTC2862CDD-1
LTC2862CDD-2
TJMAX = 150°C, θJA = 43°C/W,
LTC2862IDD-1
LTC2862HDD-1
LTC2862IDD-2
LTC2862HDD-2
VCC
1
RO
2
DI
3
GND
4
8 A
DI1
LTC2863IDD-2
LTC2863HDD-2
V GROUND LOOP
≤25V
2862345 TA01a
GND2
DE
3
DE 4
11 B
DI
4
7 Z
DI 5
10 Z
GND
5
6 Y
GND 6
9
Y
GND 7
8
NC
LTC2864CS-1
LTC2864IS-1
LTC2864HS-1
LTC2864CS-2
RO
RE
DE
DI
VL
GND
9 A
11
EXPOSED PAD (PIN 11) CONNECT TO PCB GND
θJC = 3°C/W
TJMAX = 150°C, θJA = 43°C/W,
LTC2864CDD-1
LTC2864CDD-2
LTC2864IDD-1
LTC2864HDD-1
TOP VIEW
1
2
3
4
5
6
13
8 B
DDPACKAGE
PACKAGE
DD
10-LEAD
(3mm×× 3mm)
3mm) PLASTIC
DFNDFN
10-LEAD
(3mm
PLASTIC
LTC2864IS-2
LTC2864HS-2
LTC2864MPS-1
LTC2864MPS-2
LTC2864IDD-2
LTC2864HDD-2
TOP VIEW
12
11
10
9
8
7
VCC
A
B
Z
Y
SLO
MSEPACKAGE
PACKAGE
MSE
12-LEADPLASTIC
PLASTIC MSOP
12-LEAD
MSOP
LTC2865IMSE
LTC2865HMSE
RO
1
RE
2
12 VCC
DE
3
DI
4
9
Z
VL
5
8
Y
GND
6
7
SLO
11 A
13
10 B
DE PACKAGE
PACKAGE
DE
12-LEAD
(4mm ×
× 3mm)
DFNDFN
12-LEAD
(4mm
3mm)PLASTIC
PLASTIC
EXPOSED PAD (PIN 13) CONNECT TO PCB GND
θJA = 43°C/W, θJC = 4.3°C/W
TJMAX = 150°C,LTC2865CDE
LTC2865IDE
LTC2865HDE
LTC2865 Receiving 10Mbps ±200mV Differential
Signal with 1MHz ±25V Common Mode Sweep
DI2
A,B
A,B
50V/DIV
A-B
0.5V/DIV
RO2
RE2
DE2
D
GND1
12
LTC2862
Rt
D
12 A
5 Y
R
Rt
2
6 Z
LTC2863IDD-1
LTC2863HDD-1
R
RO1
RE1
DE1
1
RE
7 B
9
DD PACKAGE
PACKAGE
DD
8-LEAD
(3mm×× 3mm)
3mm) PLASTIC
DFNDFN
8-LEAD
(3mm
PLASTIC
EXPOSED PAD (PIN 9) CONNECT TO PCB GND
θJC = 3°C/W
TJMAX = 150°C, θJA = 43°C/W,
LTC2863CDD-1
LTC2863CDD-2
VCC2
VCC1
RE 3
10 VCC
RO
EXPOSED PAD (PIN 13) CONNECT TO PCB GND
θJA = 40°C/W, θJC = 10°C/W
TJMAX = 150°C,
LTC2865CMSE
RS485 Link With Large Ground Loop Voltage
LTC2862
13 NC
LTC2865
6 A
TOP VIEW
8
LTC2863CS8-1
LTC2863IS8-1
LTC2863HS8-1
LTC2863CS8-2
8 VCC
9
DD PACKAGE
PACKAGE
DD
8-LEAD
(3mm×× 3mm)
3mm) PLASTIC
DFNDFN
8-LEAD
(3mm
PLASTIC
TOP VIEW
VCC 1
RO 2
TJMAX = 150°C, θJA = 88°C/W, θJC = 37°C/W
TOP VIEW
8
14 VCC
PACKAGE
SSPACKAGE
14-LEAD(150mil)
(150mil) PLASTIC
SO SO
14-LEAD
PLASTIC
TOP VIEW
RO 1
TOP VIEW
TOP VIEW
NC 1
RO
5V/DIV
A-B
RO
100ns/DIV
2862345 TA01b
LDO
LT3030
Dual 750mA/250mA Low Dropout,
Low Noise, Micropower Linear Regulator
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APPLICATIONS
Internal circuitry provides reverse-battery protection, reverse-current
protection, current limiting with foldback and thermal shutdown
with hysteresis. The adjustable output voltage device has a 1.220V
reference voltage. The LT3030 is offered in the thermally enhanced
20-lead TSSOP and 28-lead, low profile (4mm × 5mm × 0.75mm)
QFN packages.
The LT3030 optimizes stability and transient response with low ESR
ceramic output capacitors, requiring a minimum of only 10μF/3.3μF.
General Purpose Linear Regulator
Battery-Powered Systems
Microprocessor Core/Logic Supplies
Post Regulator for Switching Supplies
Tracking/Sequencing Power Supplies
Dropout Voltage vs Load Current
500
TOP VIEW
TOP VIEW
ADJ1
1
20 SHDN1
BYP1
2
19 PWRGD1
OUT1
3
18 IN1
OUT1 1
22 PWRGD1
OUT1
4
17 IN1
OUT1 2
21 IN1
GND
5
16 GND
GND 3
20 IN1
GND
6
15 GND
GND 4
OUT2
7
14 IN2
GND 5
OUT2
8
13 IN2
BYP2
GND
21
9
ADJ2 10
19 GND
18 GND
400
350
300
200
OUT1
150
GND 6
17 IN2
100
12 PWRGD2
16 IN2
50
11 SHDN2
OUT2 8
15 PWRGD2
0
9 10 11 12 13 14
0
75 150 225 300 375 450 525 600 675 750
OUTPUT CURRENT (mA)
3030 TA01b
2.5VIN to 1.8V/1.5V Application
UFD PACKAGE
UFD
PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
28-LEAD (4mm × 5mm) PLASTIC QFN
LT3030EUFD
LT3030IUFD
OUT2
250
OUT2 7
FE
FE PACKAGE
PACKAGE
20-LEADPLASTIC
PLASTIC TSSOP
20-LEAD
TSSOP
LT3030EFE
LT3030IFE
LT3030HFE
LT3030MPFE
28 27 26 25 24 23
GND
29
TJ = 25°C
450
DROPOUT VOLTAGE (mV)
n
SHDN1
n
GND
n
SHDN2
n
GND
n
GND
n
GND
n
GND
n
ADJ1
n
GND
n
The LT®3030 is a dual, micropower, low noise, low dropout linear
regulator. The device operates with either common or independent
input supplies for each channel, over a 1.8V to 20V input voltage
range. Output 1/Output 2 supply 750mA/250mA respectively with
a typical dropout voltage of 300mV. With an external 10nF bypass
capacitor, output noise is only 20μVRMS over a 10Hz to 100kHz
bandwidth. Designed for use in battery-powered systems, the
low 120μA/75μA quiescent current makes it an ideal choice. In
shutdown, quiescent current drops to less than 1μA. Shutdown
control is independent for each channel and its precision logic
threshold allows for voltage lockout functionality. The LT3030
includes a PWRGD flag for each channel to indicate output
regulation.
BYP1
n
DESCRIPTION
ADJ2
n
FEATURES
Output Current: 750mA/250mA
Low Dropout Voltage: 300mV
Low Noise: 20μVRMS (10Hz to 100kHz)
Low Quiescent Current: 120μA/75μA
Wide Input Voltage Range: 1.8V to 20V
Adjustable Output: 1.220V Reference Voltage
Shutdown Quiescent Current: <1μA
Stable with 10µF/3.3µF Minimum Output Capacitor
Stable with Ceramic, Tantalum or Aluminum Electrolytic Capacitors
Precision Threshold for Shutdown Logic or UVLO Function
PWRGD Flag for each Output
Reverse Battery and Reverse Output-to-Input Protection
Current Limit with Foldback and Thermal Shutdown
Thermally Enhanced 20-Lead TSSOP and
28-Lead (4mm × 5mm) QFN Packages
BYP2
n
VIN
2.5V
IN1
3.3µF
IN2
1M
OUT1
10nF
LT3030
SHDN1
BYP1
SHDN2
ADJ1
113k
1%
VOUT1
1.8V
10µF 750mA
237k
1%
1M
PWRGD1
PWRGD2
OUT2
10nF
BYP2
GND
ADJ2
3030 TA01a
54.9k
1%
VOUT2
1.5V
3.3µF 250mA
237k
1%
13
LED Driver
LT3954
40VIN LED Converter with Internal PWM Generator
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
3000:1 True Color PWM™ Dimming for LEDs
Wide VIN Range: 4.5V to 40V
Rail-to-Rail Current Sense Range: 0V to 40V
Internal 40V/5A Switch
Programmable PWM Dimming Signal Generator
Constant Current (±3%) and Constant-Voltage (±2%) Regulation
Accurate Analog Dimming
Drives LEDs in Boost, SEPIC, CUK, Buck Mode, Buck-Boost
Mode, or Flyback Configuration
Output Short-Circuit Protected Boost
Open LED Protection and Reporting
Adjustable Switching Frequency: 100kHz to 1MHz
Programmable VIN UVLO with Hysteresis
C/10 Indication for Battery Chargers
Low Shutdown Current: <1µA
Thermally Enhanced 5mm × 6mm QFN Package
The LT®3954 is a DC/DC converter designed to operate as
a constant-current source and constant-voltage regulator. It
features an internal low side N-channel MOSFET rated for 40V/5A.
The LT3954 is ideally suited for driving high current LEDs, but
also has features to make it suitable for charging batteries and
supercapacitors. The fixed frequency, current mode architecture
results in stable operation over a wide range of supply and output
voltages. A voltage feedback pin serves as the input for several LED
protection features, and also makes it possible for the converter to
operate as a constant-voltage source. A frequency adjust pin allows
the user to program the frequency from 100kHz to 1MHz to optimize
efficiency, performance or external component size.
The LT3954 senses output current at the high side or at the low side
of the load. The internal PWM generator can be configured to selfoscillate at fixed frequency with duty ratio programmable from 4%
to 96%. When driven by an external signal, the PWM input provides
LED dimming ratios of up to 3000:1. The CTRL input provides
additional analog dimming capability.
APPLICATIONS
PWM Dimming Waveforms at
Various DIM Voltage Settings
VDIM = 8V
DCPWM = 97.2%
VDIM = 3.87V
DCPWM = 50%
ILED
0.65A/DIV
VC
CTRL
VREF
PWM
VMODE
TOP VIEW
DIM/SS
VDIM = 1.47V
DCPWM = 10%
36 35 34 33 32 31 30
SYNC 1
28 ISP
EN/UVLO 2
27 ISN
INTVCC 3
37
GND
GND 4
3954 TA01b
0.5ms/DIV
VIN = 24V
VLED = 32V
25 FB
VDIM = 0V
DCPWM = 2.8%
24 GND
VIN 6
23 PWMOUT
38
SW
SW 8
SW 9
21 SW
95% Efficiency 20W Boost LED Driver with Internal PWM Dimming
20 SW
NC 10
PGND
PGND
PGND
12 13 14 15 16 17
PGND
n
PGND
n
RT
n
High Power LEDs
Output Short-Circuit Protected Boost
Battery and Supercap Chargers
Accurate Current Limited Voltage Regulators
GNDK
n
22µH
VIN
5V TO 30V
4.7µF
499k
VIN
UHE
UHEPACKAGE
PACKAGE
36-LEAD
(5mm××6mm)
6mm) PLASTIC
QFN
36-LEAD
(5mm
PLASTIC
QFN
147k
LT3954EUHE
LT3954IUHE
LT3954
165k
INTVCC
100k
DIM
124k
10nF
PGND
ISP
VREF
1M
4.7µF
×3
SW
EN/UVLO
28.7k
350kHz
5.1k
47nF
4.7nF
300Hz
CTRL
0.38Ω
650mA
ISN
1M
FB
VMODE
37.4k
DIM/SS
SYNC
PWM
RT
PWMOUT
VC GND GNDK INTVCC
INTVCC
20W LED STRING
(CURRENT DERATED
FOR VIN < 9V)
3954 TA01a
1µF
NOTE: GND, GNDK AND SIGNAL LEVEL COMPONENTS MUST BE CONNECTED EXTERNALLY AS SHOWN.
AN INTERNAL CONNECTION BETWEEN GNDK AND PGND PINS PROVIDES GROUNDING TO THE SUPPLY
14
Protected by U.S. Patents, including 7199560, 7321203.
µModule Regulators
LTM8001
36VIN, 5A µModule Regulator
with 5-Output Configurable LDO Array
n
n
n
n
FEATURES
DESCRIPTION
Complete Step-Down Switch Mode Power Supply with Configurable Array of Five LDOs
Step-Down Switching Power Supply
– Adjustable 10% Accurate Output Current Limit
– Constant-Current, Constant-Voltage Operation
– Wide Input Voltage Range: 6V to 36V
– 1.2V to 24V Output Voltage
Configurable Output LDO Array
– Five 1.1A Parallelable Outputs
– Outputs Adjustable from 0V to 24V
– Low Output Noise: 90μVRMS (10Hz to 1MHz)
15mm × 15mm × 3.42mm Surface Mount BGA Package
The LTM®8001 is a 36VIN, 5A step-down μModule® regulator with a
5-output configurable LDO array. Operating over an input voltage
range of 6V to 36V, the LTM8001 buck regulator supports an output
voltage range of 1.2V to 24V. Following the buck regulator is an
array of five 1.1A linear regulators whose outputs may be connected
in parallel to accommodate a wide variety of load combinations.
Three of these LDOs are tied to the output of the buck regulator,
while the other two are tied together to an undedicated input.
The low profile package (3.42mm) enables utilization of unused
space on the bottom of PC boards for high density point of load
regulation. The LTM8001 is packaged in a thermally enhanced,
compact (15mm × 15mm) and low profile (3.42mm) overmolded
ball grid array (BGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8001 is RoHS
compliant.
APPLICATIONS
n
n
n
FPGA, DSP, ASIC and Microprocessor Supplies
Servers and Storage Devices
RF Transceivers
TOP VIEW
VOUT4 SET4 VOUT3 SET3 SET2 VOUT2
11
VOUT5
10
SET5
9
BIAS123
8
VOUT1
SET1
VREF
BIAS45
ILIM
SYNC
7
VIN45
BANK 3 6
RT
GND
COMP
BANK 2
5
VOUT0
BANK 4 4
FBO
SS
RUN
3
VIN0
BANK 1
2
1
A
B
C
D
E
F
G
H
J
K
L
BGA
BGA PACKAGE
PACKAGE
121PADS
PADS(15mm
(15mm ×
121
× 15mm
15mm××3.42mm)
3.42mm)
LTM8001EY
LTM8001IY
5A Output DC/DC µModule Converter
VIN45
VIN
6V TO 36V
10µF
VIN0
510k
3.3V
RUN
BIAS123
BIAS45 LTM8001
COMP
SS
VREF
ILIM
SYNC
GND
LDO 1
VOUT1
SET1
1.1V
1.5A
VOUT2
STEP-DOWN LDO 2 SET2
SWITCHING
V
REGULATOR LDO 3 OUT3
SET3
LDO 4
350kHz
19.6k
0.9V
1.5A
VOUT4
SET4
VOUT5
FBO LDO 5 SET5
RT
118k
Protected by U.S. Patents, including 7199560, 7321203.
1.8V
1A
1.2V
1A
VOUT0
4.7µF
4.7µF
2.2µF
45.3k
54.9k
121k
470µF
+
100µF
8001 TA01
15
µModule Regulators
LTM8045
Inverting or SEPIC µModule DC/DC Converter
with Up to 700mA Output Current
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
SEPIC or Inverting Topology
Wide Input Voltage Range: 2.8V to 18V
Up to 700mA Output Current at VIN = 12V,
VOUT = 2.5V or –2.5V
Up to 375mA Output Current at VIN = 12V,
VOUT =15V or –15V
2.5V to 15V or –2.5V to –15V Output Voltage
Selectable Switching Frequency: 200kHz to 2MHz
Programmable Soft-Start
User Configurable Undervoltage Lockout
6.25mm × 11.25mm × 4.92mm BGA Package
The LTM®8045 is a µModule® (micromodule) DC/DC converter that
can be configured as a SEPIC or inverting converter by simply
grounding the appropriate output rail. In a SEPIC configuration the
regulated output voltage can be above, below or equal to the input
voltage. The LTM8045 includes power devices, inductors, control
circuitry and passive components. All that is needed to complete
the design are input and output capacitors, and small resistors to
set the output voltage and switching frequency. Other components
may be used to control the soft-start and undervoltage lockout.
The LTM8045 is packaged in a compact (6.25mm × 11.25mm)
overmolded ball grid array (BGA) package suitable for automated
assembly by standard surface mount equipment. The LTM8045 is
RoHS compliant.
APPLICATIONS
n
n
Battery Powered Regulator
Local Negative Voltage Regulator
Low Noise Amplifier Power
Maximum Output Current
vs Input Voltage
800
TOP VIEW
VOUT–
BANK 1
5
4
3
VOUT+
BANK 2
700
VIN
BANK 4
OUTPUT CURRENT (mA)
n
GND
FB
RUN
BANK 3
2
SYNC
1
A
B
C
D
E
F
SS
H
G
600
500
400
±2.5VOUT
±3.3VOUT
±5VOUT
±8VOUT
±12VOUT
±15VOUT
300
200
RT
BGA
BGA PACKAGE
PACKAGE
40-LEAD(11.25mm
(11.25mm × 6.25mm
40-LEAD
6.25mm××4.92mm)
4.92mm)
100
LTM8045EY
LTM8045IY
LTM8045MPY
2
4
6
8
10 12 14
INPUT VOLTAGE (V)
Use Two LTM8045s to Generate ±5V
LTM8045
VOUT–
VIN
RUN
4.7µF
60.4k
SS
22µF
FB
RT
130k
VOUT
–5V
•
•
VIN
2.8VDC TO 18VDC
SYNC
VOUT+
GND
LTM8045
VOUT–
VIN
•
•
RUN
RT
115k
100µF
FB
SS
VOUT+
SYNC
GND
8045 TA01b
16
16
18
8045 TA01b
45.3k
VOUT
5V
Power System Management
LTC2977
8-Channel PMBus Power System Manager
Featuring Accurate Output Voltage Measurement
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
Sequence, Trim, Margin and Supervise Eight Power Supplies
Manage Faults, Monitor Telemetry and Create Fault Logs
PMBus Compliant Command Set
Supported by LTpowerPlay™ GUI
Margin or Trim Supplies to 0.25% Accuracy
Fast OV/UV Supervisors Per Channel
Coordinate Sequencing and Fault Management Across
Multiple Chips
Automatic Fault Logging to Internal EEPROM
Operate Autonomously without Additional Software
Internal Temperature and Input Voltage Supervisors
Accurate Monitoring of Eight Output Voltages, Input Voltage and
Internal Die Temperature
I2C/SMBus Serial Interface
Can Be Powered from 3.3V, or 4.5V to 15V
Programmable Watchdog Timer
100% Pin-Compatible Upgrade to the LTC2978/LTC2978A
Available in 64-pin 9mm × 9mm QFN Package
The LTC®2977 is an 8-channel Power System Manager used to
sequence, trim (servo), margin, supervise, manage faults, provide
telemetry and create fault logs. PMBus commands support power
supply sequencing, precision point-of-load voltage adjustment
and margining. DACs use a proprietary soft-connect algorithm
to minimize supply disturbances. Supervisory functions include
overvoltage and undervoltage threshold limits for eight power supply
output channels and one power supply input channel, as well as
over and under temperature limits. Programmable fault responses
can disable the power supplies with optional retry after a fault is
detected. Faults that disable a power supply can automatically
trigger black box EEPROM storage of fault status and associated
telemetry. An internal 16-bit ADC monitors eight output voltages,
one input voltage, and die temperature. In addition, odd numbered
channels can be configured to measure the voltage across a
current sense resistor. A programmable watchdog timer monitors
microprocessor activity for a stalled condition and resets the
microprocessor if necessary. A single wire bus synchronizes power
supplies across multiple LTC power system management devices.
Configuration EEPROM supports autonomous operation without
additional software.
APPLICATIONS
n
n
Typical ADC Total Unadjusted
Error vs Temperature
0.25
0.20
VSENSEM6 1
VSENSEP7 2
VSENSEM7 3
VOUT_EN0 4
VOUT_EN1 5
VOUT_EN2 6
VOUT_EN3 7
VOUT_EN4 8
VOUT_EN5 9
VOUT_EN6 10
VOUT_EN7 11
VIN_EN 12
DNC 13
VIN_SNS 14
VPWR 15
VDD33 16
65
GND
VSENSEP0 = 1.8V
THREE TYPICAL PARTS
0.15
0.10
ERROR (%)
n
64 VSENSEP6
63 VSENSEM5
62 VSENSEP5
61 VDACM7
60 VDACP7
59 VDACP6
58 VDACM6
57 VDACM5
56 VDACP5
55 VDACP4
54 VDACM4
53 VSENSEM4
52 VSENSEP4
51 VDACM3
50 VDACP3
49 VSENSEM3
n
Computers and Network Servers
Industrial Test and Measurement
High Reliability Systems
Medical Imaging
Video
TOP VIEW
48 VSENSEP3
47 VSENSEM2
46 VSENSEP2
45 VDACM2
44 VDACP2
43 VSENSEM1
42 VSENSEP1
41 VDACM1
40 VDACP1
39 VDACP0
38 VDACM0
37 VSENSEM0
36 VSENSEP0
35 REFM
34 REFP
33 ASEL1
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
–50 –30 –10 10 30 50 70
TEMPERATURE (°C)
UPPACKAGE
PACKAGE
UP
64-LEAD (9mm × 9mm) PLASTIC QFN
VIN
VIN_SNS
3.3V**
VDD33
VDACP0
TO INTERMEDIATE
BUS CONVERTER ENABLE
VIN_EN
SDA
PMBus
INTERFACE
LTC2977CUP
LTC2977IUP
WRITE-PROTECT
TO/FROM OTHER
LTC POWER SUPPLY MANAGERS
VOUT
VSENSEP0
LTC2977*
SCL
ALERTB
VSENSEM0
CONTROL0
VOUT_EN0
WP
FAULTB00
PWRGD
WDI/RESETB
ASEL0
SHARE_CLK
R30
R20
ASEL1
2977 TA01a
DIGITALLY
MANAGED
POWER
SUPPLY
VFB
LOAD
VDACM0
GND
Protected by U.S. Patents, including 7382303, 7420359 and 7940091.
110
8-Channel PMBus Power System Manager
VPWR
64-LEAD (9mm × 9mm) PLASTIC QFN
90
2977 TA01b
4.5V < VIBUS < 15V**
VDD33 17
VDD25 18
WP 19
PWRGD 20
SHARE_CLK 21
WDI/RESETB 22
FAULTB00 23
FAULTB01 24
FAULTB10 25
FAULTB11 26
SDA 27
SCL 28
ALERTB 29
CONTROL0 30
CONTROL1 31
ASEL0 32
n
R10
SGND
TO µP RESETB INPUT
RUN/SS
GND
WATCHDOG
TIMER INTERRUPT
*SOME DETAILS OMITTED FOR CLARITY
ONLY ONE OF EIGHT CHANNELS SHOWN
**MAY BE POWERED FROM EITHER AN
EXTERNAL 3.3V SUPPLY OR THE INTERMEDIATE BUS
17
Switching Regulators—Monolithic
LTC3129
15V, 200mA Synchronous Buck-Boost
DC/DC Converter with 1.3µA Quiescent Current
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
Regulates VOUT Above, Below or Equal to VIN
Wide VIN Range: 2.42V to 15V, 1.92V to 15V After Start-Up
(Bootstrapped)
Wide VOUT Range: 1.4V to 15.75V
200mA Output Current in Buck Mode
Single Inductor
1.3µA Quiescent Current
Programmable Maximum Power Point Control
1.2MHz Ultralow Noise PWM
Current Mode Control
Pin Selectable Burst Mode® Operation
Up to 95% Efficiency
Accurate RUN Pin Threshold
Power Good Indicator
10nA Shutdown Current
Thermally Enhanced 3mm × 3mm QFN and
16-Lead MSOP Packages
The LTC®3129 is a high efficiency, 200mA buck-boost DC/DC
converter with a wide VIN and VOUT range. It includes an accurate
RUN pin threshold to allow predictable regulator turn-on and a
maximum power point control (MPPC) capability that ensures
maximum power extraction from non-ideal power sources such as
photovoltaic panels.
The LTC3129 employs an ultralow noise, 1.2MHz PWM switching
architecture that minimizes solution footprint by allowing the use
of tiny, low profile inductors and ceramic capacitors. Built-in loop
compensation and soft-start simplify the design. For high efficiency
operation at light loads, automatic Burst Mode operation can be
selected, reducing the quiescent current to just 1.3µA.
Additional features include a power good output, less than 10nA of
shutdown current and thermal shutdown.
The LTC3129 is available in thermally enhanced 3mm × 3mm QFN
and 16-lead MSOP packages. For fixed output voltage options, see
the functionally equivalent LTC3129-1, which eliminates the need for
an external feedback divider.
APPLICATIONS
Efficiency and Power Loss vs Load
90
16
15
14
13
12
11
10
9
17
PGND
VIN
BST1
SW1
PGND
SW2
BST2
VOUT
PGOOD
10
50
POWER LOSS
40
3129 TA01b
22nF
16 15 14 13
12 VOUT
BST1 1
22nF
10µH
BST1 SW1
2.42V TO 15V
VIN
10 PWM
RUN 4
9
5
6
7
8
NC
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
LTC3129EUD
LTC3129IUD
5V AT 200mA, VIN > 5V
5V AT 100mA, VIN < 5V
SW2 BST2
VOUT
VIN
VOUT
10µF
LTC3129
11 PGOOD
17
PGND
10pF
3.32M
RUN
10µF
VCC
MPPC
FB
PGOOD
PWM
1.02M
VCC
GND
PGND
2.2µF
3129 TA01a
18
1
30
BST2
SW2
60
VIN = 2.5V
0.1
VIN = 3.6V
VIN = 5V
10
VIN = 15V
VOUT = 5V
0
0.01
0.01
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
TOP VIEW
VCC 3
70
20
MSE PACKAGE
16-LEAD PLASTIC MSOP
LTC3129EMSE
LTC3129IMSE
VIN 2
100
80
EFFICIENCY (%)
1
2
3
4
5
6
7
8
EFFICIENCY
POWER LOSS (mW)
VCC
RUN
MPPC
GND
FB
NC
NC
PWM
1000
100
TOP VIEW
NC
n
PGND
n
FB
n
SW1
n
GND
n
Industrial Wireless Sensor Nodes
Post-Regulator for Harvested Energy
Solar Panel Post-Regulator/Charger
Intrinsically Safe Power Supplies
Wireless Microphones
Avionics-Grade Wireless Headsets
MPPC
n
Switching Regulators—Monolithic
LTC3129-1
15V, 200mA Synchronous Buck-Boost
DC/DC Converter with 1.3µA Quiescent Current
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
Regulates VOUT Above, Below or Equal to VIN
Wide VIN Range: 2.42V to 15V, 1.92V to 15V After Start-Up
(Bootstrapped)
Fixed Output Voltage with Eight User-Selectable Settings
from 2.5V to 15V
200mA Output Current in Buck Mode
Single Inductor
1.3µA Quiescent Current
Programmable Maximum Power Point Control
1.2MHz Ultralow Noise PWM
Current Mode Control
Pin Selectable Burst Mode® Operation
Up to 95% Efficiency
Accurate RUN Pin Threshold
Power Good Indicator
10nA Shutdown Current
Thermally Enhanced 3mm × 3mm QFN and
16-Lead MSOP Packages
The LTC®3129-1 is a high efficiency, 200mA buck-boost DC/DC
converter with a wide VIN and VOUT range. It includes an accurate
RUN pin threshold to allow predictable regulator turn-on and a
maximum power point control (MPPC) capability that ensures
maximum power extraction from non-ideal power sources such as
photovoltaic panels.
APPLICATIONS
Additional features include a power good output, less than 10nA of
shutdown current and thermal shutdown.
The LTC3129-1 is available in thermally enhanced 3mm × 3mm QFN
and 16-lead MSOP packages. For an adjustable output voltage, see
the functionally equivalent LTC3129.
Efficiency and Power Loss vs Load
16
15
14
13
12
11
10
9
17
PGND
100
80
EFFICIENCY (%)
1
2
3
4
5
6
7
8
EFFICIENCY
90
VIN
BST1
SW1
PGND
SW2
BST2
VOUT
PGOOD
70
60
10
50
POWER LOSS
40
1
30
POWER LOSS (mW)
VCC
RUN
MPPC
GND
VS3
VS2
VS1
PWM
1000
100
TOP VIEW
VIN = 2.5V
0.1
VIN = 3.6V
VIN = 5V
10
VIN = 15V
VOUT = 5V
0
0.01
0.01
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
20
MSE PACKAGE
16-LEAD PLASTIC MSOP
LTC3129EMSE-1
LTC3129IMSE-1
3129 TA01b
22nF
16 15 14 13
12 VOUT
BST1 1
VIN 2
11 PGOOD
17
PGND
VCC 3
9
5
6
7
8
LTC3129EUD-1
LTC3129IUD-1
10µF
VS1
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
SW2 BST2
VOUT
VIN
LTC3129-1
10 PWM
RUN 4
BST1 SW1
VIN
2.42V TO 15V
22nF
10µH
BST2
SW2
TOP VIEW
VS2
n
PGND
n
VS3
n
SW1
n
Industrial Wireless Sensor Nodes
Post-Regulator for Harvested Energy
Solar Panel Post-Regulator/Charger
Intrinsically Safe Power Supplies
Wireless Microphones
Avionics-Grade Wireless Headsets
GND
n
MPPC
n
The LTC3129-1 employs an ultralow noise, 1.2MHz PWM switching
architecture that minimizes solution footprint by allowing the use
of tiny, low profile inductors and ceramic capacitors. Built-in loop
compensation and soft-start simplify the design. For high efficiency
operation at light loads, automatic Burst Mode operation can be
selected, reducing the quiescent current to just 1.3µA. To further
reduce part count and improve light load efficiency, the LTC3129-1
includes an internal voltage divider to provide eight selectable fixed
output voltages.
VCC
RUN
MPPC
VOUT
5V AT
10µF 100mA VIN < VOUT
200mA VIN > VOUT
PGOOD
PWM
AA OR AAA
BATTERIES
VS1
VCC
VS2
VS3
GND
2.2µF
PGND
31291 TA01a
19
Octo-Buck
1A
1A
4A
2A
Outputs Easily Paralleled
VIN
1
2
VIN
4A
3
4
5
6
7
8
4A
1
2
3
4
5
6
7
8
VIN
4A
2A
1A
1A
1
2
1A
•
3
4
5
•
6
7
•
8
•
•
•
1A
®
TheLTC 3375deliversanewlevelofdesignflexibilitywithitsmulticonfigurable8-channeloutputs.Uptofourchannels
canbetiedtogetherforupto4Aofoutputcurrentwithasingleinductor.15uniqueoutputrailcombinationsarepossible,
enablinglate-stagepowerleveladjustments.EachsynchronousDC/DCconvertercanbepoweredandcontrolledindependently.
Anon-chipdietemperaturesensorprovidesreal-timethermaldataforsafeoperation.Pushbuttoncontrol,power-onreset,
watchdogtimerandanI2Cserialportprovideflexiblecontrolandhighreliability.
Features
Buck Efficiency vs Load
•8IndependentSynchronousBucks
100
•Master-slaveConfigurableforupto
4AOutput/Railwith1Inductor
90
•IndependentVINSuppliesforEach
Converter
•PrecisionEnablePinThresholdsfor
AutonomousSequencing(orI2C
Control)
•On-ChipDieTempMonitor
•QFN-48Package
(7mmx7mmx0.75mm)
Efficiency (%)
•15PowerStageConfigurations
80
70
60
Info & Free Samples
www.linear.com/product/LTC3375
1-800-4-LINEAR
SINGLE STAGE
DUAL STAGE
TRIPLE STAGE
QUAD STAGE
50
40
30 Burst Mode® OPERATION
V = 3.3V
20 VIN = 1.8V
OUT
10 fOSC = 2MHz
L = 2.2µH
0
1
10
100
Load Current (mA)
www.linear.com/product/LTC3375
1000
, LT, LTC, LTM, Linear Technology, the Linear logo and Burst
Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Switching Regulators—Monolithic
LTC3621/LTC3621-2
17V, 1A Synchronous Step-Down Regulator
with 3.5µA Quiescent Current
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
Wide VIN Range: 2.7V to 17V
Wide VOUT Range: 0.6V to VIN
95% Max Efficiency
Low IQ < 3.5µA, Zero-Current Shutdown
Constant Frequency (1MHz/2.25MHz)
Full Dropout Operation with Low IQ
1A Rated Output Current
±1% Output Voltage Accuracy
Current Mode Operation for Excellent Line and Load
Transient Response
Pulse-Skipping, Forced Continuous, Burst Mode® Operation
Internal Compensation and Soft-Start
Overtemperature Protection
Compact 6-Lead DFN (2mm × 3mm) Package or 8-Lead MSOPE
Package with Power Good Output and Independent SGND Pin
The LTC®3621/LTC3621-2 is a high efficiency 17V, 1A synchronous
monolithic step-down regulator. The switching frequency is fixed to
1MHz or 2.25MHz. The regulator features ultralow quiescent current
and high efficiencies over a wide VOUT range.
The step-down regulator operates from an input voltage range of
2.7V to 17V and provides an adjustable output range from 0.6V to
VIN while delivering up to 1A of output current. A user-selectable
mode input is provided to allow the user to trade off ripple noise
for light load efficiency; Burst Mode operation provides the highest
efficiency at light loads, while pulse-skipping mode provides the
lowest voltage ripple.
APPLICATIONS
List of LTC3621 Options
PART NAME
FREQUENCY
VOUT
LTC3621
1.00MHz
Adjustable
LTC3621-2
2.25MHz
Adjustable
Portable-Handheld Scanners
Automotive Applications
Emergency Radio
Efficiency and Power Loss vs Load
VIN 2
RUN 3
7
GND
90
5 INTVCC
4 FB
DCB PACKAGE
6-LEAD (2mm × 3mm) PLASTIC DFN
LTC3621EDCB
LTC3621IDCB
LTC3621EMS8E
LTC3621IMS8E
SW
VIN
RUN
PGOOD
1
2
3
4
9
GND
8
7
6
5
SGND
MODE
INTVCC
FB
EFFICIENCY
80
MS8E PACKAGE
8-LEAD PLASTIC MSOP
LTC3621EDCB
LTC3621IDCB
LTC3621EMS8E-2
LTC3621IMS8E-2
0.1
70
60
50
0.01
40
30
POWER LOSS
20
10
0
0.0001
POWER LOSS (W)
6 MODE
SW 1
1.0
100
TOP VIEW
TOP VIEW
EFFICIENCY (%)
n
0.001
VIN = 12V
0.01
0.001
0.1
LOAD CURRENT (A)
1
0.0001
3621 TA01b
2.5V VOUT with 400mA Burst Clamp, fSW = 1MHz
VIN
2.7V TO 17V
4.7µH
VIN
10µF
SW
LTC3621
RUN
FB
MODE
INTVCC
GND
Protected by U.S. Patents, including 5481178, 6580258, 6498466, 6611131, 6177787, 5705919, 5847554.
604k
22pF
VOUT
2.5V
1A
22µF
191k
3621 TA01a
1µF
21
20V, 2.5A SWITCHER+
VIN
12V
BOOST
PVIN
47µF
VOUT
0.8V @ 2.5A
1.5µH
SW
INTVCC
47µF
FB
TTHERMAL LIMIT
TMONITOR
PGND
IMONITOR
FSW = 2MHz
Programmable Input & Output Current Limits and
Monitoring with Die Temp Sensing
®
™
The LTC 3626 SWITCHER+ is the first member of a new switcher family featuring programmable input and output
current limits, as well as on-chip die temperature monitoring with programmable thermal shutdown. These features
provide enhanced system level protection, control and real time status readings. Plus, its unique controlled on-time
architecture is ideal for high step-down ratios where high switching frequencies and fast transient response are essential.
The LTC3626 combines up to 3MHz switching with a small, compact solution footprint.
Features
•Wide Output Voltage Range:
0.6V to 97%VIN
•95% Efficient
•Up to 2.5A Output Current
- Average Input and Output Current
Monitoring (IMONIN, IMONOUT)
- Programmable Average Input/Output
Current Limit
- Die Temp Monitor and Programmable
Limit (TSET)
Measured Output Current Error (%)
•2.6V to 20V Input Voltage
Output Current Monitor Error
5
Info & Free Samples
www.linear.com/product/LTC3626
4
1-800-4-LINEAR
3
2
1
0
–1
–2
–3
TA = 85°C
TA = 25°C
TA = –40°C
–4
–5
1
1.25
1.5
1.75
2
Output Current (A)
2.25
2.5
cds.linear.com/docs/Design%20Note/dn511.pdf
, LT, LTC, LTM, Linear Technology and the Linear logo are
registered trademarks and Switcher+ is a trademark of Linear
Technology Corporation. All other trademarks are the property
of their respective owners.
Switching Regulators—Monolithic
LTC3639
High Efficiency, 150V
100mA Synchronous Step-Down Regulator
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
Wide Operating Input Voltage Range: 4V to 150V
Synchronous Operation for Highest Efficiency
Internal High Side and Low Side Power MOSFETs
No Compensation Required
Adjustable 10mA to 100mA Maximum Output Current
Low Dropout Operation: 100% Duty Cycle
Low Quiescent Current: 12µA
Wide Output Range: 0.8V to VIN
0.8V ±1% Feedback Voltage Reference
Precise RUN Pin Threshold
Internal or External Soft-Start
Programmable 1.8V, 3.3V, 5V or Adjustable Output
Few External Components Required
Programmable Input Overvoltage Lockout
Thermally Enhanced High Voltage MSOP Package
he LTC®3639 is a high efficiency step-down DC/DC regulator with
internal high side and synchronous power switches that draws only
12μA typical DC supply current while maintaining a regulated output
voltage at no load.
The LTC3639 can supply up to 100mA load current and features
a programmable peak current limit that provides a simple method
for optimizing efficiency and for reducing output ripple and
component size. The LTC3639’s combination of Burst Mode®
operation, integrated power switches, low quiescent current, and
programmable peak current limit provides high efficiency over a
broad range of load currents.
With its wide input range of 4V to 150V and programmable
overvoltage lockout, the LTC3639 is a robust regulator suited for
regulating from a wide variety of power sources. Additionally, the
LTC3639 includes a precise run threshold and soft-start feature
to guarantee that the power system start-up is well-controlled in
any environment. A feedback comparator output enables multiple
LTC3639s to be connected in parallel for higher current applications.
APPLICATIONS
n
n
n
n
n
n
Industrial Control Supplies
Medical Devices
Distributed Power Systems
Portable Instruments
Battery-Operated Devices
Automotive
Avionics
The LTC3639 is available in a thermally enhanced high voltagecapable 16-lead MSE package with four missing pins.
Efficiency and Power Loss vs Load Current
100
90
TOP VIEW
SW 1
FBO
VPRG2
VPRG1
GND
5
6
7
8
17
GND
14 RUN
12
11
10
9
EFFICIENCY
OVLO
ISET
SS
VFB
MSE PACKAGE
VARIATION: MSE16 (12)
16-LEAD PLASTIC MSOP
LTC3639EMSE
LTC3639IMSE
LTC3639HMSE
LTC3639MPMSE
70
1000
VIN = 12V
VIN = 36V
VIN = 72V
VIN = 150V
60
50
40
100
POWER LOSS
30
10
POWER LOSS (mW)
VIN 3
VOUT = 5V
80
16 GND
EFFICIENCY (%)
n
20
10
0
0.1
1
1
10
LOAD CURRENT (mA)
100
3639 TA01b
5V to 150V Input to 5V Output, 100mA Step-Down Regulator
VIN
5V TO 150V
470µH
1µF
200V
VIN
SW
LTC3639
RUN
VFB
OVLO
VPRG2
VOUT
5V
10µF 100mA
SS
VPRG1
GND
3639 TA01a
23
Switching Regulators—Controllers
LTC3859AL
Triple Output, Buck/Buck/Boost
Synchronous Controller with 28µA Burst Mode IQ
n
n
n
n
n
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
Low Operating IQ: 28μA (One Channel On)
Dual Buck Plus Single Boost Synchronous Controllers
Outputs Remain in Regulation Through Cold Crank Down to 2.5V
Wide Bias Input Voltage Range: 4.5V to 38V
Buck Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
Boost Output Voltage Up to 60V
RSENSE or DCR Current Sensing
100% Duty Cycle for Boost Synchronous MOSFET Even in
Burst Mode® Operation
Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Continuous, Pulse-Skipping or Low Ripple Burst
Mode Operation at Light Loads
Very Low Buck Dropout Operation: 99% Duty Cycle
Adjustable Output Voltage Soft-Start or Tracking
Low Shutdown IQ: 10μA
Small 38-Lead 5mm × 7mm QFN and TSSOP Packages
The LTC®3859AL is a high performance triple output (buck/buck/boost)
synchronous DC/DC switching regulator controller that drives all
N-channel power MOSFET stages. Constant frequency current
mode architecture allows a phase-lockable switching frequency
of up to 850kHz. The LTC3859AL operates from a wide 4.5V to
38V input supply range. When biased from the output of the boost
converter or another auxiliary supply, the LTC3859AL can operate
from an input supply as low as 2.5V after start-up.
The 28μA no-load quiescent current extends operating runtime in
battery powered systems. OPTI-LOOP compensation allows the
transient response to be optimized over a wide range of output
capacitance and ESR values. The LTC3859AL features a precision
0.8V reference for the bucks, 1.2V reference for the boost and a
power good output indicator. The PLLIN/MODE pin selects among
Burst Mode operation, pulse-skipping mode, or continuous inductor
current mode at light loads.
APPLICATIONS
220µF
1µF
499k
VBIAS
VFB3
TG1
68.1k
4.9µH
2mΩ
VIN
2.5V TO 38V
(START-UP ABOVE 5V)
SW3
TRACK/SS1
TOP VIEW
TOP VIEW
SENSE1+
3
36 TG1
SENSE1–
4
35 SW1
FREQ
5
34 BOOST1
PLLIN/MODE
6
33 BG1
SS3 3
29 BG1
SS3
7
32 SW3
SENSE3+ 4
28 SW3
SENSE3+
8
31 TG3
SENSE3– 5
27 TG3
SENSE3–
9
39
PGND
BOOST1, 2, 3
38 37 36 35 34 33 32
31 SW1
FREQ 1
VFB3 6
29 BG3
ITH3 7
26 BOOST3
39
PGND
25 BG3
28 VBIAS
SGND 8
24 VBIAS
SGND 12
27 EXTVCC
RUN1 9
23 EXTVCC
RUN1 13
26 INTVCC
RUN2 10
22 INTVCC
RUN2 14
25 BG2
RUN3 11
21 BG2
RUN3 15
24 BOOST2
21 OV3
ITH2 19
20 TRACK/SS2
PACKAGE
FEFEPACKAGE
38-LEAD PLASTIC TSSOP
38-LEAD
PLASTIC TSSOP
LTC3859ALEFE
LTC3859ALIFE
LTC3859ALHFE
LTC3859ALMPFE
100
80
UHF PACKAGE
PACKAGE
UHF
38-LEAD (5mm × 7mm) PLASTIC QFN
38-LEAD
(5mm × 7mm) PLASTIC QFN
LTC3859ALEUHF
LTC3859ALIUHF
LTC3859ALHUHF
LTC3859ALMPUHF
8mΩ
649k
68.1k
VOUT2
8.5V
3A
68µF
Efficiency and Power Loss vs Load Current
SW2
VFB2 18
6.5µH
3859al TA01a
90
TG2
22 TG2
220µF
VOUT1
SENSE2+
SENSE2–
TRACK/SS1, 2
VFB2
SS3
PGND SGND
13 14 15 16 17 18 19
OV3
23 SW2
SENSE2+ 17
20 BOOST2
SENSE2 12
357k
68.1k
VOUT1
5V
5A
10000
VIN = 12V
VOUT1 = BURST
EFFICIENCY
1000
70
60
100
50
40
30
20
10
VOUT1 = BURST LOSS
POWER LOSS (mW)
SENSE2– 16
–
0.1µF
RUN1, 2, 3
EXTVCC
TG2
SW2
BG2
ITH1, 2, 3
TRACK/SS2
ITH3 11
0.1µF
30 BOOST1
PLLIN/MODE 2
30 BOOST3
SW1, 2, 3
BG1
SENSE1+
SENSE1–
VFB1
4.7µF
TG1
PGOOD1
37 PGOOD1
ITH1
2
VFB1
VFB1
SENSE1+
38 TRACK/SS1
VFB3 10
LTC3859AL
BG3
SENSE3–
SENSE3+
INTVCC
1
6mΩ
SW1
TG3
1.2µH
220µF
ITH1
ITH2
n
SENSE1–
n
VFB2
n
Automotive Always-On and Start-Stop Systems
Battery Operated Digital Devices
VOUT3
REGULATED AT 10V WHEN VIN < 10V
Distributed DC Power Systems
FOLLOWS VIN WHEN VIN > 10V
Multioutput Buck-Boost Applications
SENSE2+
n
Compared to the LTC3859 and the LTC3859A, the LTC3859AL is
fully pin-compatible, but with lower Burst Mode operation IQ (28µA
with one channel on).
EFFICIENCY (%)
n
1
10
0
0.0001
0.001
0.1
0.01
1
OUTPUT CURRENT (A)
10
0.1
3859al TA01b
24
Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6144194, 6177787, 6580258.
Switching Regulators—Controllers
LTC3863
60V Low IQ Inverting DC/DC Controller
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DESCRIPTION
The LTC®3863 is a robust, inverting DC/DC PMOS controller
optimized for automotive and industrial applications. It drives a
P-channel power MOSFET to generate a negative output and
requires just a single inductor to complete the circuit. Output
voltages from –0.4V to –150V are typically achievable with higher
voltages possible, only limited by external components.
APPLICATIONS
The LTC3863 is available in thermally enhanced 12-lead MSOP and
3mm × 4mm DFN packages.
The LTC3863 offers excellent light load efficiency, drawing only
70μA quiescent current in a user programmable Burst Mode
operation. Its peak current mode, constant frequency PWM
architecture provides for good control of switching frequency and
output current limit. The switching frequency can be programmed
from 50kHz to 850kHz with an external resistor and can be
synchronized to an external clock from 75kHz to 750kHz.
The LTC3863 offers programmable soft-start or output tracking.
Safety features include overvoltage, overcurrent and short-circuit
protection including frequency foldback.
Industrial and Automotive Power Supplies
Telecom Power Supplies
Distributed Power Systems
Efficiency
TOP VIEW
TOP VIEW
1
12 GATE
11 VIN
FREQ
2
SGND
3
SS
4
VFB
ITH
13
PGND
PLLIN/MODE
FREQ
SGND
SS
VFB
ITH
10 SENSE
9
CAP
5
8
RUN
6
7
VFBN
13
PGND
12
11
10
9
8
7
GATE
VIN
SENSE
CAP
RUN
VFBN
MSE PACKAGE
12-LEAD PLASTIC MSOP
LTC3863EDE
LTC3863IDE
LTC3863HDE
LTC3863MPDE
DE PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
LTC3863EMSE
LTC3863IMSE
LTC3863HMSE
LTC3863MPMSE
1
2
3
4
5
6
9
70
7
60
EFFICIENCY
40
30
CAP
10
0
0.002
10µF
25V
×2
VIN
61.9k
GATE
ITH
3
+
100µF
20V
2
1
POWER LOSS
0.02
0.2
LOAD CURRENT (A)
2
0
3863 TA01b
VIN
4.5V TO 16V
SENSE
SS
14.7k
4
PULSE-SKIPPING MODE
Burst Mode OPERATION
16mΩ
PLLIN/MODE
27nF
5
20
0.47µF
RUN
6
50
4.5V to 16V Input, –5V/1.7A Output, 350kHz Inverting Converter
350kHz
8
POWER LOSS (W)
PLLIN/MODE
90
VIN = 12V
80 VOUT = –5V
EFFICIENCY (%)
n
FEATURES
Wide Operating VIN Range: 3.5V to 60V
Wide Negative VOUT Range: –0.4V to Beyond –150V
Low Operating IQ = 70µA
Strong High Voltage MOSFET Gate Driver
Constant Frequency Current Mode Architecture
Verified FMEA for Adjacent Pin Open/Short
Selectable High Efficiency Burst Mode® Operation or PulseSkipping Mode at Light Loads
Programmable Fixed Frequency: 50kHz to 850kHz
Phase-Lockable Frequency: 75kHz to 750kHz
Accurate Current Limit
Programmable Soft-Start or Voltage Tracking
Internal Soft-Start Guarantees Smooth Start-Up
Low Shutdown IQ = 7µA
Available in Small 12-Lead Thermally Enhanced MSOP and DFN
Packages
Si7129
LTC3863
FREQ
10µH
B540C
511k
33µF
×2
+
n
VOUT
–5V
150µF 1.7A
16V
×2
SGND
VFBN
PGND
Protected by U.S. Patents, including 5731694.
VFB
68pF
80.6k
3863 TA01a
25
Switching Regulators—Controllers
LTC3890-3
60V Low IQ, Dual, 2-Phase
Synchronous Step-Down DC/DC Controller
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
FEATURES
DESCRIPTION
Wide VIN Range: 4V to 60V (65V Abs Max)
Low Operating IQ: 50µA (One Channel On)
Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
RSENSE or DCR Current Sensing
Out-of-Phase Controllers Reduce Input Capacitance and Power
Supply Induced Noise
Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Continuous, Pulse-Skipping or Low Ripple
Burst Mode® Operation at Light Loads
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Output Voltage Soft-Start or Tracking
Power Good Output Voltage Monitor
Low Shutdown IQ: <14µA
Internal LDO Powers Gate Drive from VIN or EXTVCC
Narrow SSOP Package
The LTC®3890-3 is a high performance dual step-down switching
regulator DC/DC controller that drives all N-channel synchronous
power MOSFET stages. A constant frequency current mode
architecture allows a phase-lockable frequency of up to 850kHz.
Power loss and supply noise are minimized by operating the two
controller output stages out-of-phase.
The 50μA no-load quiescent current extends operating life in
battery-powered systems. OPTI-LOOP® compensation allows the
transient response to be optimized over a wide range of output
capacitance and ESR values. A wide 4V to 60V input supply range
encompasses a wide range of intermediate bus voltages and battery
chemistries.
APPLICATIONS
Independent TRACK/SS pins for each controller ramp the output
voltages during start-up. Current mode control limits the inductor
current during short-circuit conditions. The PLLIN/MODE pin selects
among Burst Mode operation, pulse-skipping mode, or continuous
conduction mode at light loads.
Automotive Always-On Systems
Battery Operated Digital Devices
Distributed DC Power Systems
For versions with different and/or additional features, see the
LTC3890 family summary, Table 1, in the Pin Functions section of
the full data sheet.
Efficiency and Power Loss vs Output Current
TOP VIEW
1
28 TRACK/SS1
100
2
27 PGOOD1
VIN = 12V
90 VOUT = 3.3V
10000
VFB1
SENSE1+
3
26 TG1
80
1000
SENSE1–
4
25 SW1
70
FREQ
5
24 BOOST1
PLLIN/MODE
6
23 BG1
SGND
7
22 VIN
RUN1
8
21 PGND
RUN2
9
20 EXTVCC
SENSE2– 10
19 INTVCC
20
SENSE2+ 11
18 BG2
10
0
0.0001
VFB2 12
17 BOOST2
ITH2 13
16 SW2
TRACK/SS2 14
15 TG2
100
60
50
10
40
30
POWER LOSS (mW)
ITH1
EFFICIENCY (%)
n
1
0.001
0.01
0.1
1
OUTPUT CURRENT (A)
0.1
10
38903 TA01b
PACKAGE
GNGNPACKAGE
28-LEAD PLASTIC SSOP
28-LEAD
PLASTIC SSOP
High Efficiency Dual 8.5V/3.3V Output Step-Down Converter
LTC3890EGN-3
LTC3890IGN-3
LTC3890HGN-3
LTC3890MPGN-3
22µF
4.7µF
TG1
4.7µH
0.1µF
VIN
INTVCC
BOOST1
SW1
BG1
TG2
BOOST2
0.1µF
8µH
SW2
LTC3890-3
BG2
PGND
SENSE1+
SENSE2+
SENSE1–
VFB1
ITH1
SENSE2–
VFB2
ITH2
0.01Ω
0.008Ω
VOUT1
3.3V
5A
VIN
9V TO 60V
100k
470µF
1000pF
31.6k
34.8k
TRACK/SS1 SGND TRACK/SS2
0.1µF
0.1µF
100k
1000pF
34.8k
10.5k
VOUT2
8.5V
3A
330µF
38903 TA01a
26
Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258, 7230497.
Low Phase Noise
Reference Buffer/Logic Converter
Converts Sine Waves to Logic Levels with Lowest Additive Jitter
The LTC®6957 is a dual output buffer/driver/logic translator, ideal for converting sine waves into low phase noise logic level signals.
The device converts any DC to 300MHz reference frequency into dual LVPECL, LVDS or CMOS outputs with exceptionally low
additive jitter (less than 200fsRMS total jitter). The LTC6957 also features a proprietary, selectable, input stage bandwidth-limiting
feature, which substantially improves the additive phase noise for slow slewing signals by up to 3dB to 4dB.
Additive Phase Noise at 100MHz
Features
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Low Phase Noise Buffer/Driver
Three Logic Output Types Available:
LVPECL (LTC6957-1)
LVDS (LTC6957-2)
In-Phase CMOS (LTC6957-3)
Complementary CMOS (LTC6957-4)
Additive Jitter: <45fsRMS (LVPECL)
3.3V Supply Operation
Low Output Skew: 3ps Typical
Fully Specified from –40°C to 125°C
Available in 12-Pin MSOP & 3mm × 3mm DFN Packages
–140
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–145
PHASE NOISE (dBc/Hz)
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SINGLE-ENDED SINE WAVE INPUT
AT +7dBm (500mVRMS)
FILTA = FILTB = GND
LTC6957-2 (LVDS)
–150
LTC6957-4 (CMOS)
–155
–160
LTC6957-3
(CMOS)
–165
100
L, LT, LTC, LTM, Linear Technology and the Linear logo are
registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
LTC6957-1 (LVPECL)
1k
10k
100k
OFFSET FREQUENCY (Hz)
1M
The LTC6957 includes input filtering with three narrowband settings in
addition to the full bandwidth limitation of the circuit design (Table 1).
For slow slewing signals (ie <100MHz sine wave signals), substantially
lower additive phase noise can be achieved using this feature.
Table 1
The optimal filter setting depends on the clock frequency, amplitude,
and waveform shape, with the major determinant being the slew rate
at the input of the LTC6957. Table 2 shows the slew rate ranges most
suitable for the four specific filter settings.
FILTA
FILTB
BANDWIDTH
Low
Low
1200MHz (Full Bandwidth)
High
Low
500MHz (–3dB)
Low
High
160MHz (–3dB)
High
High
50MHz (–3dB)
Table 2
Another way to look at this is to consider the case of sine waves, for
which the frequency ranges will depend on the input amplitudes, as
shown in Table 3.
The LTC6957-1 100MHz phase noise plots in the figures below
illustrate the trade-offs between filter settings at various input slew
rates. For a 100MHz sine wave, a 10dBm input level results in a slew
rate of 628V/µs. Table 2 indicates the best filter setting to use is
FILTA = FILTB = L which is supported by the blue trace in Figure a.
FILTA
FILTB
INPUT SLEW RATE (V/µs)
Low
Low
>400
High
Low
125 to 400
Low
High
40 to 125
High
High
<40
Table 3
FREQUENCY RANGE
With 0dBm at 100MHz, the input slew rate is 198V/µs. Table 2 indicates
that the best filter setting is FILTA = H, FILTB = L which is supported
by the green trace in Figure b. As the input decreased 10dB from
Figure a to Figure b, the blue trace rose 5dB while the green trace only
rose 3dB.
INPUT
AMPLITUDE
(dBm)
With –10dBm at 100MHz, the input slew rate is 63V/µs. Table 2 recommends the best filter setting is FILTA = L, FILTB = H which is supported
by the red trace in Figure c. As the input decreases 10dB from Figure a
to Figure b, then 10dB from Figure b to Figure c, the red trace rose
3dB, then 4dB, while the blue and green traces rose much faster.
–5
–10
FILTA = L,
FILTB = L
(MHz)
FILTA = H,
FILTB = L
(MHz)
FILTA = L,
FILTB = H
(MHz)
FILTA = H,
FILTB = H
(MHz)
10
>63
20 to 63
6.3 to 20
<6.3
5
>112
35 to 112
11 to 35
<11
0
>200
63 to 200
20 to 63
<20
>112
35 to 112
<35
>200
63 to 200
<63
LTC6957-1 (LVPECL) Additive Phase Noise at 100MHz with Varying Input Amplitudes
FILTA = FILTB = H
–150
–155
FILTA = L, FILTB = H
FILTA = H, FILTB = L
–160
–145
–150
FILTA = FILTB = H
FILTA = L, FILTB = H
–155
–160
FILTA = FILTB = L
1k
10k
100k
OFFSET FREQUENCY (Hz)
(a)
1M
–165
100
1k
10k
100k
OFFSET FREQUENCY (Hz)
(b)
1M
FILTA = FILTB = H
FILTA = FILTB = L
–145
–150
FILTA = H, FILTB = L
FILTA = L, FILTB = H
–155
–160
FILTA = H, FILTB = L
FILTA = FILTB = L
–165
100
–140
SINGLE-ENDED SINE WAVE INPUT,
100MHz AT 0dBm (632.5mVP-P)
LTC6957-1
PHASE NOISE (dBc/Hz)
PHASE NOISE (dBc/Hz)
–145
–140
SINGLE-ENDED SINE WAVE INPUT,
100MHz AT 10dBm (2VP-P)
LTC6957-1
PHASE NOISE (dBc/Hz)
–140
SINGLE-ENDED SINE WAVE INPUT,
100MHz AT –10dBm (200mVP-P)
LTC6957-1
–165
100
1k
10k
100k
OFFSET FREQUENCY (Hz)
1M
(c)
www.linear.com/6957 n 1-800-4-LINEAR
0313
Timing
LTC6957-1/LTC6957-2/LTC6957-3/LTC6957-4
Low Phase Noise, Dual Output Buffer/Driver/
Logic Converter
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FEATURES
DESCRIPTION
Low Phase Noise Buffer/Driver
Optimized Conversion of Sine Wave Signals to Logic Levels
Three Logic Output Types Available
– LVPECL
– LVDS
– CMOS
Additive Jitter 45fsRMS (LTC6957-1)
Frequency Range Up to 300MHz
3.15V to 3.45V Supply Operation
Low Skew 3ps Typical
Fully Specified from –40°C to 125°C
12-Lead MSOP and 3mm × 3mm DFN Packages
The LTC®6957-1/LTC6957-2/LTC6957-3/LTC6957-4 is a family of
very low phase noise, dual output AC signal buffer/driver/logic level
translators. The input signal can be a sine wave or any logic level
(≤2VP-P). There are four members of the family that differ in their
output logic signal type as follows:
LTC6957-1: LVPECL Logic Outputs
LTC6957-2: LVDS Logic Outputs
LTC6957-3: CMOS Logic, In-Phase Outputs
LTC6957-4: CMOS Logic, Complementary Outputs
The LTC6957 will buffer and distribute any logic signal with minimal
additive noise, however, the part really excels at translating sine
wave signals to logic levels. The early amplifier stages have
selectable lowpass filtering to minimize the noise while still
amplifying the signal to increase its slew rate. This input stage
filtering/noise limiting is especially helpful in delivering the lowest
possible phase noise signal with slow slewing input signals such as
a typical 10MHz sine wave system reference.
APPLICATIONS
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System Reference Frequency Distribution
High Speed ADC, DAC, DDS Clock Driver
Military and Secure Radio
Low Noise Timing Trigger
Broadband Wireless Transceiver
High Speed Data Acquisition
Medical Imaging
Test and Measurement
LTC6957-1, LTC6957-2
LTC6957-3, LTC6957-4
TOP VIEW
LTC6957-1, LTC6957-2
1
12 SD1
FILTA
1
12 SD1
V+
2
11 OUT1+
V+
2
IN+
3
10 OUT1–
IN+
11 V DD
3
IN–
4
9 OUT2–
IN–
4
GND
5
GND
5
FILTB
6
8 OUT2+
7 SD2
FILTB
6
13
GND
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
LTC6957IDD-1
LTC6957IDD-2
13
GND
10 OUT1
9 OUT2
8 GNDOUT
7 SD2
FILTA
V+
IN+
IN–
GND
FILTB
12
11
10
9
8
7
LTC6957-2 (LVDS)
LTC6957-4 (CMOS)
OCXO
–155
100MHz
+7dBm
SINE WAVE
–165
100
1
2
3
4
5
6
V+
1k
10k
100k
OFFSET FREQUENCY (Hz)
1M
SD1
V DD
OUT1
OUT2
GNDOUT
SD2
SD1
10nF
OUT1
IN+
TO PLL CHIPS
OR SYSTEM
SAMPLING CLOCKS
IN–
10nF
LTC6957-1 (LVPECL)
12
11
10
9
8
7
MS PACKAGE
12-LEAD PLASTIC MSOP
LTC6957IMS-3
LTC6957HMS-3
LTC6957IMS-4
LTC6957HMS-4
FILTB
50Ω
LTC6957-3
(CMOS)
FILTA
V+
IN+
IN–
GND
FILTB
3.3V
0.1µF
FILTA
–150
SD1
OUT1+
OUT1–
OUT2–
OUT2+
SD2
MS PACKAGE
12-LEAD PLASTIC MSOP
LTC6957IMS-1
LTC6957HMS-1
LTC6957IMS-2
LTC6957HMS-2
DD
DD PACKAGE
PACKAGE
12-LEAD
12-LEAD (3mm
(3mm ×× 3mm)
3mm) PLASTIC
PLASTIC DFN
DFN
LTC6957IDD-3
LTC6957IDD-4
SINGLE-ENDED SINE WAVE INPUT
AT +7dBm (500mVRMS)
FILTA = FILTB = GND
–145
–160
TOP VIEW
1
2
3
4
5
6
Additive Phase Noise at 100MHz
–140
LTC6957-3, LTC6957-4
TOP VIEW
TOP VIEW
FILTA
PHASE NOISE (dBc/Hz)
n
OUT2
LTC6957
GND
SD2
6957 TA01a
69571234 TA01b
Protected by U.S. Patents, including 7969189 and 8319551.
29
Timing
LTC6995-1/LTC6995-2
TimerBlox: Long Timer, Low Frequency Oscillator
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FEATURES
DESCRIPTION
Period Range: 1ms to 9.5 Hours
Timing Reset by Power-On or Reset Input
Configured with 1 to 3 Resistors
<1.5% Maximum Frequency Error
Programmable Output Polarity
2.25V to 5.5V Single Supply Operation
55µA to 80µA Supply Current (2ms to 9.5hr Clock Period)
500µs Start-Up Time
CMOS Output Driver Sources/Sinks 20mA
–55°C to 125°C Operating Temperature Range
Available in Low Profile (1mm) SOT-23 (ThinSOT™)
and 2mm × 3mm DFN Packages
The LTC®6995 is a silicon oscillator with a programmable period
range of 1.024ms to 9.54 hours (29.1µHz to 977Hz), specifically
intended for long duration timing events. The LTC6995 is part of the
TimerBlox® family of versatile silicon timing devices.
A single resistor, RSET, programs the LTC6995’s internal master
oscillator frequency. The output clock period is determined by
this master oscillator and an internal frequency divider, NDIV ,
programmable to eight settings from 1 to 221.
tOUT =
When oscillating, the LTC6995 generates a 50% duty cycle square
wave output. A reset function is provided to stop the master
oscillator and clear internal dividers. Removing reset initiates a full
output clock cycle which is useful for programmable power on reset
and watchdog timer applications.
APPLICATIONS
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Power-On Reset Timer
Long Time One Shot
“Heartbeat” Timers
Watchdog Timers
Periodic “Wake-Up” Call
High Vibration, High Acceleration Environments
TOP VIEW
V+ 1
DIV 2
SET 3
7
GND
The LTC6995 has two versions of reset functionality. The reset input
is active high for the LTC6995-1 and active low for the LTC6995-2.
The polarity of the output when reset is selectable for both versions.
OUTPUT (OSCILLATOR START STATE)
TOP VIEW
RST/RST 1
6 OUT
5 GND
6 OUT
GND 2
5 V+
SET 3
4 DIV
4 RST/RST
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
LTC6995CS6-1
LTC6995IS6-1
LTC6995HS6-1
LTC6995MPS6-1
LTC6995CS6-2
LTC6995IS6-2
LTC6995HS6-2
LTC6995MPS6-2
DCB PACKAGE
6-LEAD (2mm × 3mm) PLASTIC DFN
LTC6995CDCB-1
LTC6995IDCB-1
LTC6995HDCB-1
LTC6995CDCB-2
LTC6995IDCB-2
LTC6995HDCB-2
NDIV • RSET
• 1.024ms, NDIV = 1,8,64,...,221
50kΩ
RST/RST
POLARITY
LTC6995-1
0
0
Oscillating (Low)
LTC6995-2
0 (Reset)
1
0
0 (Reset)
Oscillating (Low)
0
1
Oscillating (High)
1 (Reset)
1
1
1 (Reset)
Oscillating (High)
Active Low Power-On Reset Timer
RST
OUT
V+
LTC6995-1
GND
V+
V+
1M
118k
SET
DIV
392k
0.1µF
OUT
5 SECONDS
1/2 tOUT
TIMER STOPPED
POWER-ON RESET
(1ms TO 4.8 HOURS)
699512 TA01
30
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© LT/FWG 0513 17K · Printed in U.S.A
1630 McCarthy Blvd., Milpitas, CA 95035-7417
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80V Sync Buck-Boost
Variable Input
2.8V to 80V
Up to 250W
IIN SET
Input Current:
Regulate or
Monitor
CSN
CSP
BG2
TG1
CSPIN
VIN SET
Fixed Output
1.3V to 80V
Output Current:
Regulate or
Monitor
BG1
CSNIN
IOUT SET
TG2
LT8705
CSPOUT
CSNOUT
FBIN
FBOUT
GND
VOUT SET
Four Regulation Loops (VOUT, I OUT, VIN and IIN)
®
The LT 8705 is the latest in our growing family of single inductor buck-boost controllers. This wide input voltage
range, high power controller is capable of delivering efficiencies up to 98.5% for a 48V, 5A output from an input voltage
range of 2.8V to 80V. Using a single inductor and 4 external MOSFETs, the LT8705 can deliver output power up to 250W.
Input or output voltage or current, any of these can be regulated with the devices’ 4 control loops. Its input regulation
loop is ideal for high impedance sources such as solar panels.
Features
36V to 80V Input; 48V, 5A Output
100
•Single Inductor
•VOUT Range: 1.3V to 80V
•VOUT, IOUT, VIN, IIN Feedback Loops
•Current Monitors
•Synchronous Rectification
•Quad N-Channel MOSFET Gate Drivers
•Solar-Powered Battery Charger Capable
1-800-4-LINEAR
98.0
97.0
Efficiency (%)
•VIN Range: 2.8V to 80V
www.linear.com/product/LT8705
99.0
•Very High Efficiency
Info & Free Samples
96.0
95.0
94.0
93.0
VIN = 36V
92.0
VIN = 48V
91.0
VIN = 80V
90.0
0.5 1.00
2.00
3.00
4.00
Load Current (A)
video.linear.com/138
5.00
, LT, LTC, LTM, Linear Technology and the Linear logo are
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