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UNISONIC TECHNOLOGIES CO., LTD L5201
LOW NOISE, REGULATED CHARGE PUMP DC/DC CONVERTERS
6 5
CMOS IC
MSOP-8 4
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 <1A. The L5201-ADJ is available in MSOP-8 package and L5201-fixed in SOT-26 and TSOT-26 package.
1 4
2
3 SOT-26
6
5
12
3 TSOT-26
*Pb-free plating product number: L5201L
FEATURES
* Low Noise Constant Frequency Operation * Output Current: 90mA@3.0VORDERING INFORMATION
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 MSOP-8 MSOP-8 SOT-26 TSOT-26 Packing 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 (c) 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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L5201
MARKING (For SOT-26/TSOT-26)
6 LF 1 2 3 5 4 Lead Plating Voltage Code
CMOS IC
PIN CONFIGURATIONS
MSOP-8 C+ 1 VIN 2 C- 3 PGND 4 8 VOUT 7 FB 6 SHDN 5 SGND VOUT GND SOT-26/TSOT-26 1 2 UTC L5201-XX (Fixed) 6 5 4 C+ VIN C-
UTC L5201-ADJ
SHDN 3
PIN DESCRIPTION
L5201-ADJ MSOP-8 1 2 3 4, 5 6 PIN NO. L5201-xx SOT-26/TSOT-26 6 5 4 2 3 PIN NAME C+ VIN C GND
SHDN
FUNCTION Flying Capacitor Positive Terminal Input Supply Voltage, should be bypassed with at least 6.8f lo ESR ceramic capacitor. Flying Capacitor Negative Terminal Ground terminal, should be tied to a ground plane for best performance Shutdown Mode, Active-Low Input. A low on SHDN disables the
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 6.8f 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
www.unisonic.com.tw
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L5201
BLOCK DIAGRAM
UTC L5201 Adjustable version (MSOP-8)
CMOS IC
SOFT - START
SWITCH CONTROL
SHDN
FB -
ERROR AMPLIFIER
OSCILLATOR
+ VOUT
1.268V
CHARGE PUMP
+ C VIN C
SGND
PGND
UTC L5201 fixed version (SOT-26/TSOT-26)
SOFT - START
SWITCH CONTROL
SHDN
VOUT
_ ERROR AMPLIFIER + OSCILLATOR
1. 268V
CHARGE PUMP
C+ V IN C
_
GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L5201
ABSOLUTE MAXIMUM RATINGS
CMOS IC
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.
ELECTRICAL CHARACTERISTICS
(VCC=VSHDN = 3V, Ta=25C, CFLY=1F, CIN=10F, COUT=10F, 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 High Low Feedback Voltage (For L5201-ADJ) Ripple Voltage (For L5201-Fixed) Shutdown Supply Current Feedback Input Current (For L5201-ADJ) Efficiency (For L5201-Fixed) Frequency VOUT Turn-on time Short-Circuit Current Thermal Shutdown Temperature Thermal Shutdown Hysteresis SHDN Input Threshold VIH VIL VFB VR ISHDN IFB FOSC tON ISC TSD 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 1.4 1.217 1.268 25 25 0.3 1.319 TYP 90 4.5 5 MAX VOUT 140 4.68 V 5.2 V V V mVP-P 1 -50 88 80 1 0.35 340 150 30 50 A nA % 1.3 MHz ms mA UNIT V A
0.7
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www.unisonic.com.tw
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L5201
TYPICAL APPLICATION CIRCUIT
10F
CMOS IC
4 C VIN 2.7 V ~ VOUT 10 F 5 2 3 OFF ON
_
6 C+ V OUT 1 10F _ VOUT = 5 V + 2% , IOUT UP~ 40 mA V IN 2 .7V , IOUT UP ~ 90 mA V IN 3.0V
VIN GND SHDN
CIN, C OUT: TAIYO YUDEN, JMK212BJ106KG CFLY: TAIYO YUDEN, EMK212JB105KG
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L5201
TYPICAL CHARACTERISTICS
Startup Time with 50mA Load T T VSHDN Startup Time with 90mA Load T T VSHDN
CMOS IC
1 VOUT
1 VOUT
2 Ch1 2.00V Ch2 2.00V 100s Ch1 1.52V
2 Ch1 2.00V Ch2 2.00V 100s Ch1 1.52V
Output Ripple With IOUT=50mA T T
Output Ripple With IOUT=90mA T T
1
1
Ch1 10.0mV
M 1.00s Ch1 5.60mV
Ch1 10.0mV
M 1.00s Ch1 5.40mV
5.2 5.15 5.1
Output Voltage (V)
Output Voltage vs Output Current
5.2 5.15 5.1
Output Voltage vs Supply Voltage
5.05 5 4.95 4.9 4.85 4.8
0
VIN=3.6V
5.05 5
Ta = 100 Ta = 25
4.95 4.9
Ta = -40
VIN=2.7V
VIN=3.0V
4.85 IOUT =20mA 4.8 2.5 3.0 3.5 4.0 4.5 Supply Voltage (V) 5.0
10 20
Output Current (mA)
30 40
50 60
70 80 90
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www.unisonic.com.tw
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L5201
TYPICAL CHARACTERISTICS(Cont.)
5.2 5.15
Output Voltage (V)
CMOS IC
Output Voltage vs Temperature
1200 1150 1100
Frequency (MHz)
Frequency vs Supply Voltage
Ta = 100
5.1 5.05 5 4.95 4.9 4.85 4.8
-40
1050 1000 950 900
Ta = 25
850 Ta = -40 800 750
VIN=3.0V I OUT=50mA
-20 0 20 40 60 80 100
700
2.5
3.0
Temperature (
)
3.5 4.0 Supply Voltage (V)
4.5
5.0
1200 1150 1100
Frequency (MHz)
Frequency vs. Temperature
Efficiency vs Load Current
100 90 80 70
Efficiency (%)
VIN = 2.7V VIN = 3.0V VIN = 3.3V
1050 1000 950 900 850 800 750 700 -40 -20 0 20 40 60 80 100
60 50 40 30 20 40 0 0.01 0.1
VIN = 3.6V
Temperature (
)
1 10 100 Load Current (mA)
1000
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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