TI DCDC Solutions for
Handheld and Low Standby
Power Devices
Kean Pan
Business Development Engineer
1
Agenda
• Challenges for DCDC on Handheld / Low Power Devices
• DCS-Control Overview and Devices
• MicroSiP Modules
• Multi-phase DCDC for Processor Power
• DCDC for Multi-cell Application
• Ultra Low Power DCDC
2
TI Information – Selective Disclosure
Challenges for DCDC on Handheld / Low
Power Devices
• Smaller solution size / higher power density
• Higher efficiency
Extends operation time of application
Reduces overall system temperature
• Longer operating and stand-by time
Active communication with application, e.g. DVS
Lower quiescent current, Snooze Mode
• Lower solution cost
Less external components
Smaller external components
• Lower EMI and system noise
No need for filtering
Supporting audio, optical and RF systems
TI Information – Selective Disclosure
DCS-Control Overview
and Devices
4
TI Information – Selective Disclosure
DCS Control™ - Stands for
• High efficiency over the entire load current range
• Fastest load transient response
• Seamless transition into Power Save Mode
• Stable over a large range of output capacitance typ 10uF to 100uF
5
TI Information – Selective Disclosure
Traditional PWM Control Review
Internal Compensation
OSC = Fixed Frequency
PFM Detection Circuitry
PFM Circuitry
TI Information – Selective Disclosure
Summary – PWM control architecture
• Complex and silicon intensive (costly) Power Save Mode
entry, exit and operation mode circuits
• Loop compensation required
• Fixed switching frequency with +/-20% typical tolerance
We need something new to reach the next level
TI Information – Selective Disclosure
Basic Hysteretic Control
fs
Vin  Vout   Vout  ESR


Vhys  L  Vin
TI Information – Selective Disclosure
Switching Frequency Varies and is
a Function of ESR, L and Vhys
Considerations – Hysteretic Control
• Possibly simplest control circuit
• Fastest response to input voltage and output voltage perturbations
among all control techniques
• Switching frequency depends on Vhys, L, Vin, Vout and ESR
– Frequency variation
• Inherently stable operation
Technical items to be solved
• Modern DC DC converters have no output capacitor ESR
• Compensate for effects preventing good output voltage accuracy
• Implementation of Power Save Mode
• Control or acceptance of switching frequency variation
Requires changes to basic hysteretic control
TI Information – Selective Disclosure
TPS62130 Block Diagram
TI Information – Selective Disclosure
DCS-Control™
Proprietary Ramp Circuitry Feeds VOS (Vout) to Comparator
VOS (Vout)
FB
Hysteretic
Feedforward
ErrorCapacitor
Amplifier
Comparator for
Only Required
for Precise
for Power
DC
Fast Response
Save Mode
Regulation
Mode
to Changes in
Performance
Output Voltage
TI Information – Selective Disclosure
On Timer for
Power Save Mode
and Constant
Operating
Frequency
What Does DCS-Control™ Provide?
•Superb Transient Response
•Seamless Transition To Power
Save Mode
TI Information – Selective Disclosure
Old versus DCS-Control™
Triangle Load Sweep (10mA – 1.0A)
TPS62110
TPS62150
Output voltage
Inductor Current
Load Current
CH1 – VOUT @ 50mV/div
CH2 – IL @ 1A/div
CH3 – ILOAD @ 1A/div
CH1 – VOUT @ 50mV/div
CH2 – IL @ 1A/div
CH3 – ILOAD @ 1A/div
 No disturbing bursts during the transition
between PWM and Power Save Mode
TI Information – Selective Disclosure
How Does DCS-Control™ Go from Power
Save Mode to PWM Mode?
DCS-Control™ = Direct Control with
Seamless Transition to Power Save Mode
Seamlessly!
Operating mode is the same in Power Save
Mode and PWM mode, so there is no mode
„switch‟ -> no possibility for glitch during mode
change
TI Information – Selective Disclosure
Transition from Power Save Mode to PWM
Vout
50mV/div
~2% Vout
Load Current
1A/div
Inductor
Low Output Voltage Dip and Fast Recovery Time Current
~600 ns
&
1A/div
SW node
Seamless Transition from Power Save Mode with No Overshoot
TI Information – Selective Disclosure
No load to 1A load step with 1uH and 22uF
Standard Step down converter Portfolio
300mA-500mA
SOT23, 2x2
1st Generation
600mA
1A, 1.2A, 1.6A
2A
3A
SOT23, 2x2
MSOP, 2x2, 3x3
2x2
3x3
TPS62200
TPS62220
TPS62000
TPS62020
TPS62040
TPS62260
L=1.0uH to 2.2uH
TPS62240
TPS62270***
TPS62290
TPS62060
TPS62065
DCS Control™
TPS62230
TPS62080
TPS62085*
TPS62090
TPS62590
TLV62080
TLV62065
TLV62090
L=4.7uH to 10uH
2nd Generation
L=1.0uH to 2.2uH
Cout up to 100uF
Value Devices
TPS62560
16
TI Information – Selective Disclosure
TPS62090 - 3A High efficiency step down
converter
Features
• VIN range from 2.5V to 6V
• 2.8MHz/1.4MHz switching frequency
Applications
• Notebook, Netbook computers
• Adjustable and fixed output voltage options
• Solid State Drive
• 100% duty cycle mode for lowest dropout
• Hard Disk Drive
• 20uA quiescent current in Power Save Mode
• Output voltage discharge function
• Adjustable softstart and short circuit
protection
• 10uF to 100uF output capacitance
• Processor supply
• Distributed power supplies
• Battery powered applications
• Thermal shutdown
• Package 3x3 QFN package
Smallest solution size 2.8MHz with 0.47uH
Highest efficiency 1.4MHz with 1uH
17
TI Information – Selective Disclosure
Efficiency 1.4MHz, 1.8V output
Coilcraft XFL4020
4x4x2.1
TPS62090 PG 1.0 Vout = 1.8V // Board 2 // 1.4MHz // Hiccup dis. // CL max 1-Eff 2D Iout 25°C
100
95
90
Efficiency [%]
85
80
88% efficiency at
1mA
75
70
90% efficiency at 2A
1uH inductor
65
60
55
50
0.00001
0.00010
0.00100
0.01000
0.10000
1.00000
10.00000
Iout [A]
2.7
3.7
5.0
18
TI Information – Selective Disclosure
Efficiency 2.8MHz, 1.8V output
Coilcraft XFL4020
4x4x2.1
TPS62090 PG 1.0 Vout = 1.8V // Board 2 // 2.8MHz // Hiccup dis. // CL max 1-Eff 2D Iout 25°C
100
95
90
Efficiency [%]
85
80
75
70
89% efficiency at 2A
400nH inductor
65
60
55
50
0.00001
0.00010
0.00100
0.01000
0.10000
1.00000
10.00000
Iout [A]
2.7
TI Information – Selective Disclosure
3.7
5.0
19
Fastest possible load transient response
Load Step 0.2A to 2A
Immediate and fastest
response to a load
step due to 100%
switch turn on
CH2:Vout, CH4=Iload, CH1=Inductor current
20
TI Information – Selective Disclosure
Seamless transition into Power Save Mode
Output voltage ripple
<20mV under all
conditions
CH2:Vout, CH3=Iload, CH4=Inductor current
TI Information – Selective Disclosure
21
Stable from 10uF up to 100uF output
capacitance
1uH/100uF
1uH/10uF
CH2:Vout, CH4=Iload, CH1=Inductor current
Load Step 0.2A to 2A
22
TI Information – Selective Disclosure
TPS62080 – 1.2A High efficiency step down
converter
Features
• Vin range from 2.5V to 6V
• 3MHz switching frequency
• Adjustable and fixed output voltage options
• 100% duty cycle mode for lowest dropout
Applications
• Battery powered applications
• Distributed power supplies
• Notebook, Netbook computers
• 20uA quiescent current in Power Save Mode
• 6.5uA quiescent current in SNOOZE Mode
• Output voltage discharge function
• 10uF to 100uF output capacitance
• Thermal shutdown
• 3x3 QFN package
10% efficiency increase with
SNOOZE Mode
23
TI Information – Selective Disclosure
60% efficiency at
100uA in SNOOZE
Mode
90% efficiency at 0.6A
1uH inductor
24
TI Information – Selective Disclosure
TPS62080 load transient response
Only 25mV drop for
a 1A load step!
25
TI Information – Selective Disclosure
DCS Control™ - Stands for
• High efficiency over the entire load current range
• Fastest load transient response
• Seamless transition into Power Save Mode
• Stable over a large range of output capacitance typ 10uF to 100uF
26
TI Information – Selective Disclosure
MicroSiPTM DC/DC Converters
Fully Integrated Power Solutions
SiP … What is it all about?
SiP stands for System in Package, i.e. a multiplicity of devices acting in concert
to perform one or more functions unattainable by a single (cost effective) device.
The package is the interconnect medium used to create a virtual “single” device.
A SiP approach can offer a significant number of advantages.
1. Smallest solution size : Innovative 3D integration
2. Optimized electrical performance: Comparable efficiency,
lower EMI
3. Ease of use: Reduced HW design workload / application issues
4. One stop shopping
The advantages coming along with this technology can only be realized if:
- The rationale for doing the SiP meets certain criteria.
- There is a balance between SiP lamitate area vs. silicon size.
Order of Target Customer Preferences
1. Size
– Solution size >45% smaller
compared to discrete solution
– Less than 1mm height
2. Ease of Use
– No External Components needed
– Simplified PCB Layout
– One-Stop-Shop
3.
Performance
– Superior EMI and noise
performance
– Similar feature set and efficiency
as discrete DC/DC converters
1 mm
(max)
PicoStarTM
PicoStarTM
TPS82671/x675
600mA Fully Integrated, Low Noise Step-Down Converter in MicroSiP™
• Regulated Switching Frequency: 5.5MHz
• All required external components are
integrated
• Spread Spectrum, PWM Frequency Dithering,
High PSRR and low ripple Power Save Mode
• Automatic Power Safe Mode transition or
forced PWM Mode operation
• Input voltage: 2.3V to 4.8V
• Allows < 7mm2 total solution size, thus provides
90mA/mm2
• One-Stop-Shop, reduced HW design workload and no
more questionable designs
• Supports noise sensitive applications through improved
RF spurious performance and radiated noise reduction
• Allows to choose between high efficiency over entire
load range (PSM) or regulated fixed frequency
• Supports Li-Ion batteries with extended voltage range
•
•
•
•
TPS82671
1.80 Vout, PFM/PWM Mode
TPS82675
1.20 Vout, PFM/PWM Mode
Cell Phones, Smart-Phones
Portable Audio/Video
Digital TV, WLAN, GPS and Bluetooth™
Portable Medical Devices
MircoSiP™ Module Overview
1 mm
(max)
Step-Down Converter
Device
TPS82676
TPS82677
Output
Voltage [V]
1.10
1.20
Supply Voltage
Range [V]
2.3 – 4.8
2.3 – 4.8
Output Current
[mA]
600
600
Features
TPS82674
TPS82675
TPS82673
1.20
1.20
1.26
2.3 – 4.8
2.3 – 4.8
2.3 – 4.8
600
600
600
PFM/PWM Mode, Output Cap Discharge, SSM
PFM/PWM Mode, SSM
PFM/PWM Mode, Output Cap Discharge, SSM
TPS82672
TPS82671
1.50
1.80
2.3 – 4.8
2.3 – 4.8
600
600
PFM/PWM Mode, SSM
PFM/PWM Mode, SSM
TPS826711
1.80
2.3 – 4.8
600
PFM/PWM Mode, Output Cap Discharge, SSM
TPS82670
1.86
2.3 – 4.8
600
PFM/PWM Mode, Output Cap Discharge, SSM
TPS82690
2.85
2.3 – 4.35
500
PFM/PWM Mode, Output Cap Discharge
TPS82695
2.50
2.3 – 4.35
500
PFM/PWM Mode, Output Cap Discharge
PFM/PWM Mode, Output Cap Discharge, SSM
PWM Mode, Output Cap Discharge
SSM = Spread Spectrum Modulation
Boost Converter
Device
TPS81256
Output
Voltage [V]
5.0
Supply Voltage
Range [V]
2.5 – 5.5
Output Current
[mA]
550+
Features
PFM/PWM Mode, Load Disconnect
Multi-phase DCDC for Processor
Power
32
TI Information – Selective Disclosure
App Processor Trends
• Process node scaling
100
• Reduced process scale:
90nm
process node [nm]
60nm
45nm
28nm
–
–
–
–
Increased leakage
Higher process variation
Reduced VDD and wider distribution
Reduced parasitic gate capacitance
overcompensated by
• Increased gate #
• Higher clock rates
10
2002
2004
2006
2008
2010
2012
• Higher clock rates and SoC
integration
– Driven by performance need
– Marketing driven
• Battery technology
– Does not keep pace
– New batteries:
• Ever increasing power demand
2
P  Pstatic  Pdynamic  f(VDD )  f(CGate ,#,fCR ,VDD
)
33
TI Information – Selective Disclosure
Key Focus: High Efficiency Operation
PFM 1-ph Power Stage
Efficiency
PFM Split Power Stage
PWM 2-ph Power Stages
PWM 1-ph Power Stage
→ high efficiency operation over the complete load range
Load Current
•
Ultra Light load: PFM split power stage.
–
•
Light load: single phase PFM operation.
–
•
Small RDS,on FETs keep efficiency high at medium loads
High load: multi-phase PWM operation
–
•
PFM maintains high efficiency conversion.
Medium load: single phase PWM operation
–
•
Parasitic FET gate capacitance is kept at minimum number for lowest currents
Phases operate in parallel. The effective RDS,on is divided by the number of phases. In addition, losses in the inductor are kept as small as
possible since the DCR is divided as well.
Incorporated Charge-Pump
–
Si-Anode low-VIN efficiency boost/ process variation /peak output current efficiency boost
TI Information – Selective Disclosure
Key Focus: Smallest Solution Size
• Smallest solution size is achieved
by
– Stand-alone concept: compared to
PMICs, decoupling caps can be
saved, placement can be optimized
– Small input and output capacitors
– Cancelling additional external
components
– Enabling smallest inductors
• Single phase: allowing tiniest inductors
by high frequency operation and
current limits optimized for choosing
tiny inductors
• Multi phase: The multi-phase
technology allows for choosing
smallest inductors with small saturation
currents. The overall size of the n
inductors is smaller than a single
inductor with an according saturation
current would be. Still, smaller effective
DCRs can be achieved keeping
inductor losses small by putting them in
parallel.
Height requirements (<1.2mm,
<1.0mm, <0.8mm) can be met.
Volume Factor 4 for 2x current.
½ I (0.47uH) vs. I (0.47uH)
Volume Factor 2 for 2x current for ½ inductance
½ I (0.47uH) vs. I (0.2uH)
35
TI Information – Selective Disclosure
Multi phase vs. two inductors in parallel
•
•
To achieve smallest solution size, tiny inductors are a must. Tiny inductors come with limited saturation
current ratings. So why not putting simply two inductors in parallel to overcome height constrains?
DCR variation causes inductor current to be
unequally distributed. A PCB temperature
gradient might enforce this effect
–
–
Efficiency suffers since the “seen” DCR is not DCR/2
An inductor might run into saturation. A higher
saturation current is required, increasing solution size
•
No phase shedding feasible
•
No phase inversed operation possible
•
Regulation bandwidth limitation
•
On TPS6238xx solutions, the current is actively balanced
•
The efficiency benefits from both DCR and RDS,on in
parallel reducing losses by 50% for two phases and by 66%
for three phases
•
Automatic phase shedding allows highest efficiency over the
complete output current range
•
The output voltage ripple is minimized by phase inverted
operation
•
EMI and input ripple are minimized by phase inverted
operation
•
The effective regulation bandwidth is increased with the
number of phases
•
Balancing and precise current limits allow the choice of
tiniest inductors
36
TI Information – Selective Disclosure
TPS62385x Overview
• 4.7A 2-Phase Step-Down Converter
•
Highest Efficiency
–
–
–
–
–
–
Reduced Inductor and On-Chip losses by Multi Phase Design
SmartRail Technology for highest Efficiency over the whole Load Range
Integrated Charge Pump for low Battery Efficiency Boosting
Low RDS,on Switches and Active Rectifiers
Automatic dual-to-single Phase Transition
Power Save Mode for Light Load Efficiency
•
I²C High Speed Compatible Interface
•
Excellent DC and AC Output Voltage Regulation
–
–
–
–
•
Differential Load Sensing
Multiplied Regulation Bandwidth by Multi Phase Design
Precise DC Output Voltage Accuracy
Reduced Output Voltage Ripple by 180°-Phase Shifted Operation
Multiple Robust Operation and Protection Features
–
–
–
–
–
Soft Start with 500μs Startup Time
Power Good Indication
Programmable Slew Rate at Voltage Transition
Low Battery Voltage Ripple by Phase Shifted Operation
Over Temperature Monitoring and Protection with programmable
thresholds
Input Under Voltage Detection and Lockout
Output Current Limit and Protection
7-bit SAR ADC for Output Current Monitoring
Interrupt Signal for Exception Handling
–
–
–
–
•
Programmable Output Voltage 10mV Steps
–
–
0.5V to 1.77V
Optional: VOUT can be analog controlled via VSEL
TI Information – Selective Disclosure
•
2.22mm x 2.44mm chip size
•
0.5mm pitch
–
–
Enables low cost board version
Best for power trace routing
TPS62386x Overview
• 6.8A 2-Phase Step-Down Converter
•
Highest Efficiency
–
–
–
–
–
–
Reduced Inductor and On-Chip losses by Multi Phase Design
SmartRail Technology for highest Efficiency over the whole Load Range
Integrated Charge Pump for low Battery Efficiency Boosting
Low RDS,on Switches and Active Rectifiers
Automatic dual-to-single Phase Transition
Power Save Mode for Light Load Efficiency
•
I²C High Speed Compatible Interface
•
Excellent DC and AC Output Voltage Regulation
–
–
–
–
•
Differential Load Sensing
Multiplied Regulation Bandwidth by Multi Phase Design
Precise DC Output Voltage Accuracy
Reduced Output Voltage Ripple by 180°-Phase Shifted Operation
Multiple Robust Operation and Protection Features
–
–
–
–
–
Soft Start with 500μs Startup Time
Power Good Indication
Programmable Slew Rate at Voltage Transition
Low Battery Voltage Ripple by Phase Shifted Operation
Over Temperature Monitoring and Protection with programmable
thresholds
Input Under Voltage Detection and Lockout
Output Current Limit and Protection
7-bit SAR ADC for Output Current Monitoring
Interrupt Signal for Exception Handling
–
–
–
–
•
Programmable Output Voltage 10mV Steps
–
–
0.5V to 1.77V
Optional: VOUT can be analog controlled via VSEL
TI Information – Selective Disclosure
•
2.22mm x 2.44mm chip size
•
0.5mm pitch
–
–
Enables low cost board version
Best for power trace routing
TPS62387x Overview
• 7.8A 2-Phase Step-Down Converter
•
Highest Efficiency
–
–
–
–
–
–
Reduced Inductor and On-Chip losses by Multi Phase Design
SmartRail Technology for highest Efficiency over the whole Load Range
Integrated Charge Pump for low Battery Efficiency Boosting
Low RDS,on Switches and Active Rectifiers
Automatic dual-to-single Phase Transition
Power Save Mode for Light Load Efficiency
•
I²C High Speed Compatible Interface
•
Excellent DC and AC Output Voltage Regulation
–
–
–
–
•
Differential Load Sensing
Multiplied Regulation Bandwidth by Multi Phase Design
Precise DC Output Voltage Accuracy
Reduced Output Voltage Ripple by 180°-Phase Shifted Operation
Multiple Robust Operation and Protection Features
–
–
–
–
–
Soft Start with 500μs Startup Time
Power Good Indication
Programmable Slew Rate at Voltage Transition
Low Battery Voltage Ripple by Phase Shifted Operation
Over Temperature Monitoring and Protection with programmable
thresholds
Input Under Voltage Detection and Lockout
Output Current Limit and Protection
7-bit SAR ADC for Output Current Monitoring
Interrupt Signal for Exception Handling
–
–
–
–
•
Programmable Output Voltage 10mV Steps
–
–
0.5V to 1.77V
Optional: VOUT can be analog controlled via VSEL
TI Information – Selective Disclosure
•
2.22mm x 2.44mm chip size
•
0.5mm pitch
–
–
Enables low cost board version
Best for power trace routing
DCDC for Multi-Cell Applications
40
TI Information – Selective Disclosure
DCS-Control™ Step-Down Converter
VIN MAX >6V
Vin
Vout
Iout
L-C
Package
Solution Size
[mm2] *
Features
75mA
22uH/4.7uF
3x3 SOT
30
Iq=11uA, EN, PG,
2x2 SON (TPS62122),
DCS-ControlTM
300mA
10uH/10uF
2x2 SON
40
Iq=11uA, Adj. EN, PG,
DCS-ControlTM
TPS62120
2.0 to 15V
ADJ,
2.0V
TPS62125
3.0 to 17V
ADJ,
1.8V
TPS62130
3.0 to 17V
ADJ, 1.8,
3.3, 5.0V
3.0 A
1uH/22uF
3x3 QFN
95
Iq=17uA, EN, PG,
FSW, DEF, SS/TR,
DCS-ControlTM
TPS62140
3.0 to 17V
ADJ, 1.8,
3.3, 5.0V
2.0A
1uH/22uF
3x3 QFN
95
Iq=17uA, EN, PG,
FSW, DEF, SS/TR,
DCS-ControlTM
Pin to Pin Compatible
Pin to Pin Compatible
TPS62150
3.0 to 17V
ADJ, 1.8,
3.3, 5.0V
1.0A
1uH/22uF
3x3 QFN
85
Iq=17uA, EN, PG,
FSW, DEF, SS/TR,
DCS-ControlTM
TPS62160
3.0 to 17V
ADJ, 1.8,
3.3, 5.0V
1.0A
2.2uH/22uF
2x2 SON
45
Iq=17uA, EN, PG,
DCS-ControlTM
TPS62170
3.0 to 17V
ADJ, 1.8,
3.3, 5.0V
0.5A
2.2uH/22uF
2x2 SON
45
Iq=17uA, EN, PG,
DCS-ControlTM
* Estimated Total Solution Size based on EVM layout for fixed VOUT, incl. CIN, COUT and L
Released:
November 2011
TPS6216x/17x
Tiny 17V 0.5A/1A Step-Down Converter in 2x2 WSON
• DCS-Control™ topology: fast AC line and load transient
response plus seamless transition into Power Save Mode
• Maintains a stable and accurate output voltage
• Supports high Output Capacitance of up to 200uF
• Robust design through supporting many L-C
combinations and on board capacitance
• Works with small inductor and low ESR capacitors
• Allows cost efficient external components and
supports a total solution size of 45mm2
• 100% Duty Cycle and 17uA typ. Quiescent Current
• Enables extended application run time through
lowest dropout and power consumption
• Power Good Output
• Indicates output voltage condition, e.g. for
system communication like startup
sequencing.
• General Purpose Point-of-Load
• Industrial Applications, e.g. PLC, measurement
• DSC Camera
• Enterprise Solid-state drives
• Low power DSP core applications
• Computing
TPS62160EVM-627
TPS62170EVM-627
Released:
November 2011
TPS62130/40/50:
3 - 17V VIN, 1-3A, 2.5MHz Step-Down Converters in 3x3mm QFN
•
High Efficiency Step Down Converter with DCS-ControlTM
• High VIN step down converter with small solution size
•
VIN range from 3 to 17V
• 12V @ 3.3V / 3A utilizing a 1uH inductor
•
Adjustable VOUT from 0.9 to 6.0V
• DCS-ControlTM regulation is fast and accurate
•
Fixed VOUT options: 1.8V, 3.3V, 5.0V
•
Output current up to: 3A (TPS62130)
• Low quiescent current and selectable switching
frequency for high efficiency
2A (TPS62140)
• VFB control allows current source applications
1A (TPS62150)
•
(3 .. 17)V
Seamless transition to Power Save Mode
•
Pin-selectable switching frequency (full, half)
•
100% Duty Cycle Mode
•
10uF
Quiescent current of 17uA (typ.)
•
Power Good
•
General Purpose POL
•
Solid State Disk Drives
•
Embedded and mobile Computing
•
Industrial applications
TI Information – Selective Disclosure
SW
AVIN
VOS
EN
PG
TPS62131
Programmable Soft Start and Tracking
•
1.8V / 3A
1μH
PVIN
SS/TR
3.3nF
FB
DEF
AGND
FSW
PGND
Cstart
Adjustable Startup
DEF
Pin Selectable Output Voltage
TR
FB Voltage Control
FSW
Pin Selectable Switching Frequency
TPS62130EVM-505
TPS62140EVM-505
TPS62150EVM-505
100k
22uF
TLV6213x/5x:
4 .. 17V VIN, 3/1A, Step-Down Converters in 3x3mm QFN
•
High Efficiency Step Down Converter with DCS-ControlTM
• High VIN step down converter with small solution size
•
VIN range from 4 to 17V
• 12V @ 3.3V / 3A utilizing a 1uH inductor
•
Adjustable VOUT from 0.9 to 5.0V
• DCS-ControlTM regulation is fast and accurate
•
Output current up to: 3A (TLV62130)
• Low quiescent current and selectable switching
frequency for high efficiency
1A (TLV62150)
•
Seamless transition to Power Save Mode
•
Pin-selectable switching frequency (full, half)
•
100% Duty Cycle Mode
•
•
•
• VFB control allows current source applications
(3 .. 17)V
Programmable Soft Start.
Quiescent current of 17uA (typ.)
10uF
•
Solid State Disk Drives
•
Embedded and mobile Computing
•
Industrial applications
TI Information – Selective Disclosure
VOS
SS/TR
3.3nF
General Purpose POL
AVIN
EN
Power Good
•
SW
PG
TPS62131
Cstart
Adjustable Startup
TR
FB Voltage Control
1.8V / 3A
1μH
PVIN
FSW
FB
DEF
AGND
FSW
PGND
Pin Selectable Switching Frequency
100k
22uF
Ultra Low Power DC DC
Product Overview + Roadmap
45
TI Information – Selective Disclosure
Ultra Low Power - Product Status
• TPS62120 Industry's first
commercial successful energy
harvester in full production Iq=11uA
• CC430 solar demonstrator
• TPS61251 adjustable current limit
boost converter with 2uA Snooze
mode
• TPS62730 CC2540 Companion
Step Cown Converter with 30nA
standby mode
• TPS62125 300mA Step down
Converter with 6uA EN comparator
46
TI Information – Selective Disclosure
Ultra low power device line up (RTM’ed)
DC/DC
Topology
VIN
IOUT
Key Features
Package
Application
TPS62120
TPS62122
Step Down
2V –
15V
75mA
Iq = 11uA, DCSControlTM
2x2 SON,
SOT23-8
Self powered wireless
switch, embedded
processing, Low Power
RF
TPS62730
Step Down
1.9V –
3.9V
100mA
Iq 30nA in Bypass,
22uA in DC/DC mode,
DCS-ControlTM
1x1.5
SON
Low Power RF companion
DC/DC for CC2540/41,
CC430, CC1120 etc.
TPS62125
Step Down
3V –
17V
300mA
6uA Iq Input SVS,
13uA Iq active, VO
1.2V to 10V, DCSControlTM
2x2 SON
8
Embedded processing,
current loops, energy
harvesting, 4 cell alkaline
powered sensors
TPS61220
boost
0.7V –
5.5V
200mA
SW
limit
Iq 5.5uA
SC 70 - 6
1-3 cell alkaline powered
application e.g. sensors
TPS61251
boost
2.3V –
6.0V
2uA Iq snooze mode,
100mA - 1.5A
programmable input
current limit
2x2 SON
Low Iq buffer cap charger
47
TPS62730 (TPS_Radio)
100mA DC/DC solution with Bypass Mode
• Selectable or Automatic Transition from
DC/DC to bypass mode
• Extends application run time by up to 20%
• Up to 95% Efficiency, 25uA (typ.) Quiescent
Current and 30nA (typ.) Shutdown Current
• Support reduction of total power consumption from
battery
• Excellent low Output Voltage Ripple
• Makes this device ideal for RF applications
• DCS-Control™ topology
• Enables seamless transition into Power Save Mode
and excellent transient and AC load regulation
• Package: 1mm x 1.5mm QFN and 0402 caps,
0603 inductor
• Small external components and small IC package
allow for solution size of <12mm2
• BLE (Bluetooth Low Energy)
TPS62730EVM-726
• MSP430 and alike controller supply
• HVAC (Heating, Ventilating, and Air
Conditioning)
V
• RF4CE (ZigBee)
TPS62730
IN
1.9V - 3.9V
VIN
• Metering
• Smoke Detectors
CIN
2.2µF ON
GND
BYP
SW
VOUT
ON/BYP STAT
VOUT
L 2.2mH 2.1V
COUT
2.2µF
TPS62120, TPS62122
2V to 15V Input, 75mA Iout, 96% efficiency Step-Down Converter
 High efficiency in PFM mode
 Above 70% efficiency @ 100uA
 2.5V Rising / 1.85V Falling UVLO Thresholds
,
,
 Wide UVLO hysteresis window allows the storage of energy in
, CIN until there is enough for the converter to efficiently transfer
to the output avoiding short cycling during buck power-up
 Active Discharge Capacitor (TPS62120)
,
 Allows time control for power sequencing & a clear and sharp start
up voltage.
 Power Good pin (TPS62120)
 Notification of output voltage being regulated when Vout is greater
than 95% of the nominal value
 SOT-23-8 (TPS62120), 2x2 QFN (TPS62122)
 Multiple solar cells
 Inductive energy harvesters
 Low Power RF Applications
 Low Power Microprocessor
 Industrial sensing (12V bus)
TPS62122EVM-586
TPS62120EVM-640
TI Information – Selective Disclosure
High Efficiency
Above 70% @ 100µA for 10VIN
TI Information – Selective Disclosure
Proper start up from weak source
5V
300uA
Solar
Module
600
Lux
C store
100µ F
CIN
4.7µ F
TPS62120
vs.
TPS62231
TPS62120 UVLO hysteresis ~ 600mV
Runtime ~ 4ms -> 130uWs Energy
L
VOUT = 1.8V
COUT
4.7 µF
Load
100R
TPS62231UVLO
hysteresis ~100mV
Runtime ~ 400us -> 13uWs
Larger UVLO Hysteresis  more energy can be extracted from the storage capacitor
TI Information – Selective Disclosure
Released:
May 2012
TPS62125
300-mA Step-Down Converter with Adjustable Enable Threshold and Hysteresis
• Adjustable ENABLE threshold and
hysteresis
• DCS-Control™ topology
• High efficiency over entire load and
supply voltage range
• Wide input voltage range: 3V - 17V
• 100% Duty Cycle for Lowest Dropout
• Extend application run-time through high design flexibility
• Maintains a stable output voltage through a fast AC line
and load transient response
• Increases Efficiency at very light loads (>60% at 100uA)
• Allows to capture the entire energy from the harvester;
tolerates multiple different supply types
• Achieves longest run-time by allowing the application to
operate close to the input voltage level
• Energy Harvesting supplies
• Battery applications: 4x Alkaline or 2-4 Li-Ion cells
• 9V – 15V bus voltage rails
• Embedded Processing
• Inverter (negative VOUT)
TPS62125EVM-044
TPS62125
Programmable EN Comparator
 Precise (3%) programmable start up threshold setting
 Only 6uA quiescent current consumption
 EN comparator with internal 50mV hysteresis
 Increasing hysteresis with external resistor on EN-hys pin
VIN
VIN_startup
DC/DC ON
VIN
VIN
ON/
SHDN
VREF
Hysteresis
REN1
EN
VIN_stop
DC/DC OFF
REN2
VOUT
EN
Comparator
REF
EN_hys
Proper VOUT ramp up
R EN HYS
GND
TI Information – Selective Disclosure
Thank you
54
TI Information – Selective Disclosure