UNISONIC TECHNOLOGIES CO., LTD
L5201
CMOS IC
LOW NOISE, REGULATED
CHARGE PUMP DC/DC
CONVERTERS
MSOP-8
6
4
2
1
5
4
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6
SOT-26
1 2
3
TSOT-26
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*Pb-free plating product number: L5201L
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FEATURES
3
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DESCRIPTION
The UTC L5201-xx series are low noise, constant frequency
charge pump DC/DC converters and designed to increase efficiency
in white LED application. The operating voltage range is 2.7V ~ VOUT
input with up to 100mA of output current. Low external parts counts
(one flying capacitor and two small bypass capacitors at VIN and
VOUT) make the UTC L5201-xx series ideally suited for small,
battery-powered applications.
A charge-pump architecture maintains constant switching
frequency to zero load and reduces both output and input ripple. The
UTC L5201-xx series have thermal shutdown capability to escape
the device damaged from a continuous short-circuit. With built-in
soft-start circuitry to prevents excessive current flow at VIN during
start-up. High switching frequency enables the use of small ceramic
capacitors. A low-current shutdown feature disconnects the load from
VIN and reduces quiescent current to <1µA.
The L5201-ADJ is available in MSOP-8 package and
L5201-fixed in SOT-26 and TSOT-26 package.
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* Low Noise Constant Frequency Operation
* Output Current:
90mA@3.0V<VIN<5V
100mA@3.0V<VIN<4.5V
* 1MHz Switching Frequency
* 4.5V/5.0V Fixed Output Voltage
* VIN Range: 2.7V ~ VOUT
* Automatic Soft-Start.
* No Inductors
* Less than 1µA of Shutdown Current
ORDERING INFORMATION
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Ordering Number
Normal
Lead Free Plating
L5201-AD-SM1-R
L5201L-AD-SM1-R
L5201-AD-SM1-T
L5201L-AD-SM1-T
L5201-xx-AG6-R
L5201L-xx-AG6-R
L5201-xx-AH6-R
L5201L-xx-AH6-R
Note: xx :output voltage
Package
Packing
MSOP-8
MSOP-8
SOT-26
TSOT-26
Tape Reel
Tube
Tape Reel
Tape Reel
L5201L-AD-SM1-R
(1)Packing Type
(2)Package Type
(3)Output Voltage
(4)Lead Plating
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
(1) R: Tape Reel, T: Tube
(2) SM1: MSOP-8, AG6: SOT-26, AH6: TSOT-26
(3) AD: ADJ, xx: 45:4.5V, 50:5.0V
(4) L: Lead Free Plating, Blank: Pb/Sn
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QW-R502-107,A
L5201
CMOS IC
MARKING (For SOT-26/TSOT-26)
6
5
4
Lead Plating
LF
Voltage Code
2
3
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1
PIN CONFIGURATIONS
UTC
L5201-ADJ
PGND 4
PIN DESCRIPTION
PIN NO.
L5201-xx
SOT-26/TSOT-26
6
5
3
4
4, 5
6
1
GND
2
SHDN 3
UTC
L5201-XX
(Fixed)
PIN
NAME
C+
6
C+
5
V IN
4
C-
FUNCTION
Flying Capacitor Positive Terminal
Input Supply Voltage, should be bypassed with at least 6.8µf low ESR
ceramic capacitor.
Flying Capacitor Negative Terminal
Ground terminal, should be tied to a ground plane for best
performance
VIN
C¯
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2
6 SHDN
5 SGND
VOUT
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L5201-ADJ
MSOP-8
1
8 VOUT
7 FB
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C+ 1
VIN 2
C- 3
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SOT-26/TSOT-26
MSOP-8
2
GND
3
SHDN
Shutdown Mode, Active-Low Input. A low on SHDN disables the
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L5201 series. SHDN must not be allowed to float.
Feedback Input Pin for Adjustable output. An output divider should be
7
X
FB
connected from VOUT to FB to program the output voltage.
Regulated Output Voltage, should be bypassed with at least 6.8µf low
8
1
VOUT ESR ceramic capacitor as close as possible to the pin for best
performance
X : The pin is Inexistent for SOT-26 and TSOT-26 package.
UNISONIC TECHNOLOGIES CO., LTD
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QW-R502-107,A
L5201
CMOS IC
BLOCK DIAGRAM
UTC L5201 Adjustable version (MSOP-8)
SWITCH
CONTROL
SOFT - START
SHDN
FB
-
+
OSCILLATOR
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ERROR
AMPLIFIER
1.268V
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VOUT
CHARGE
PUMP
+
C
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VIN
C
SGND
PGND
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UTC L5201 fixed version (SOT-26/TSOT-26)
SWITCH
CONTROL
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SOFT - START
SHDN
VOUT
ERROR
AMPLIFIER
+
1. 268V
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OSCILLATOR
_
CHARGE
PUMP
C+
V IN
C
_
GND
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QW-R502-107,A
L5201
CMOS IC
ABSOLUTE MAXIMUM RATINGS
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PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage(to GND)
VIN
-0.3 ~ 6
V
Charge Pump Voltage(to GND)
VOUT
-0.3 ~ 5.5
V
V SHDN
-0.3 ~ (VIN+0.3)
Shutdown Voltage(to GND)
V
Maximum DC Output Current (Note 1)
IOUT
150
mA
VOUT Short-Circuit Duration
Indefinite
Operating Temperature
TOPR
-40 ~ +85
℃
Storage Temperature
TSTG
-40 ~ +150
℃
Note: 1. Based on long-term current density limitations.
2. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
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ELECTRICAL CHARACTERISTICS
SHDN Input Threshold
High
Low
Feedback Voltage (For L5201-ADJ)
Shutdown Supply Current
VIH
VIL
VFB
VR
VIN = 3V, IOUT = 50mA
VIN = 3V, IOUT = 90mA
2.7V＜VIN＜5V, IOUT=0mA,
VSHDN = 0
VFB=1.4V
VIN = 2.7V, IOUT = 40mA
VIN = 3V, IOUT = 90mA
Oscillator Free Running
VIN = 3V, IOUT = 0mA
VIN = 3V, VOUT = GND,
SHDN = 3V
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Ripple Voltage (For L5201-Fixed)
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(VCC=VSHDN = 3V, Ta=25°C, CFLY=1µF, CIN=10µF, COUT=10µF, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
Input Voltage
VIN
VOUT=5.0V
2.7
2.7V＜VIN＜5V, IOUT=0mA,
No Switching Supply Current
IQ
SHDN=VIN, VOUT=5.5V
2.7V＜VIN＜5V, IOUT≤ 50mA
L5201-4.5V
4.32
3.0V＜VIN＜5V, IOUT≤ 100mA
Output Voltage
VOUT
2.7V＜VIN＜5V, IOUT ≤ 40mA
L5201-5.0V
4.8
3.0V＜VIN＜5V, IOUT≤ 90mA
IFB
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Feedback Input Current (For L5201-ADJ)
ISHDN
Efficiency (For L5201-Fixed)
Frequency
VOUT Turn-on time
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Short-Circuit Current
FOSC
tON
ISC
TSD
MAX
VOUT
UNIT
V
90
140
µA
4.5
4.68
5
5.2
V
1.4
1.217
1.268
25
25
-50
0.7
88
80
1
0.35
0.3
1.319
V
V
V
mVP-P
1
µA
50
nA
%
1.3
MHz
ms
340
mA
150
30
℃
℃
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Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
η
TYP
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QW-R502-107,A
L5201
CMOS IC
TYPICAL APPLICATION CIRCUIT
10µF
4
C
5
10 µF
2
3
OFF ON
VIN
6
C+
V OUT
GND
1
10µF
VOUT = 5 V _
+ 2%
,
IOUT UP~ 40 mA V IN ≥ 2 .7V
,
I OUT UP ~ 90 mA V IN ≥ 3.0V
SHDN
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CIN, C OUT: TAIYO YUDEN, JMK212BJ106KG
CFLY: TAIYO YUDEN, EMK212JB105KG
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VIN
2.7 V ~ VOUT
_
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QW-R502-107,A
L5201
CMOS IC
TYPICAL CHARACTERISTICS
Startup Time with 50mA Load
T
T
VSHDN
1
Startup Time with 90mA Load
T
T
VSHDN
1
VOUT
2
Ch1 2.00V Ch2 2.00V 100µs Ch1 1.52V
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VOUT
Ch1 2.00V Ch2 2.00V 100µs Ch1 1.52V
Output Ripple With IOUT=90mA
T
T
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Output Ripple With IOUT=50mA
T
T
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1
Ch1 10.0mV
5.2
Output Voltage vs Output Current
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5.15
M 1.00µs Ch1 5.60mV
5.05
5.2
5.05
5
4.95
4.95
Ta = 100℃
Ta = 25℃
4.9
0
Output Voltage vs Supply Voltage
5.15
5
4.85
4.8
M 1.00µs Ch1 5.40mV
5.1
VIN=3.6V
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Output Voltage (V)
5.1
Ch1 10.0mV
Ta = -40℃
4.9
VIN=2.7V
10 20
VIN=3.0V
30 40
50 60
Output Current (mA)
70 80 90
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4.85
IOUT =20mA
4.8
2.5
3.0
3.5
4.0
4.5
Supply Voltage (V)
5.0
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L5201
CMOS IC
TYPICAL CHARACTERISTICS(Cont.)
Output Voltage vs Temperature
5.2
5.05
5
4.95
1050
4.9
0
20
40
60
80
700
100
Temperature (℃)
2.5
3.0
3.5
4.0
Supply Voltage (V)
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100
90
1150
80
1100
4.5
5.0
Efficiency vs Load Current
Frequency vs. Temperature
1200
VIN = 2.7V
VIN = 3.0V
70
Efficiency (%)
1050
1000
950
900
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Frequency (MHz)
850 Ta = -40℃
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-20
900
750
I OUT=50mA
-40
950
800
VIN=3.0V
4.85
Ta = 25℃
1000
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Frequency (MHz)
Output Voltage (V)
1100
5.1
850
800
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750
700
Ta = 100℃
1150
5.15
4.8
Frequency vs Supply Voltage
1200
-40 -20
0
20
40
60
80
100
VIN = 3.3V
50
40
VIN = 3.6V
30
20
40
0
0.01
0.1
1
10
100
Load Current (mA)
1000
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Temperature (℃)
60
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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www.unisonic.com.tw
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QW-R502-107,A