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UNISONIC TECHNOLOGIES CO., LTD L5200
LOW NOISE, REGULATED CHARGE PUMP DC/DC CONVERTERS
6 5
CMOS IC
MSOP-8 4
DESCRIPTION
The UTC L5200-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 L5200-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 L5200-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 L5200-ADJ is available in MSOP-8 package and L5200-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: L5200L
FEATURES
* Low Noise Constant Frequency Operation * Output Current: 100mA * 2MHz Switching Frequency * 4.5V/5.0V Fixed Output Voltage * VIN Range: 2.7V ~ VOUT * Automatic Soft-Start. * No Inductors * Less than 1A of Shutdown Current
ORDERING INFORMATION
Ordering Number Normal Lead Free Plating L5200-AD-SM1-R L5200L-AD-SM1-R L5200-AD-SM1-T L5200L-AD-SM1-T L5200-xx-AG6-R L5200L-xx-AG6-R L5200-xx-AH6-R L5200L-xx-AH6-R Note: xx :output voltage L5200L-AD-SM1-R (1)Packing Type (2)Package Type (3)Output Voltage (4)Lead Plating (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 , Package MSOP-8 MSOP-8 SOT-26 TSOT-26 Packing Tape Reel Tube Tape Reel Tape Reel
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd
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L5200
MARKING (For SOT-26/TSOT-26)
6 LE 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 L5200-XX (Fixed) 6 5 4 C+ VIN C-
UTC L5200-ADJ
SHDN 3
PIN DESCRIPTION
L5200-ADJ MSOP-8 1 2 3 4, 5 6 PIN NO. L5200-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 a 1F~4.7f low 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 L5200 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 a 1F~4.7F 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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L5200
BLOCK DIAGRAM
UTC L5200 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 L5200 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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L5200
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 -20 ~ +85 Storage Temperature TSTG -40 ~ +150 Note 1: Based on long-term current density limitations. 2: Stressed above Absolute Maximum Ratings may impair life or cause permanent damage to the device. 3. The device is guaranteed to meet performance specification within 0 ~+70 operating temperature range and assured by design from -20 ~+85 , characteristic and correlation with static process control.
ELECTRICAL CHARACTERISTICS
(Ta =25 , VIN =3.6V, CFLY=1F, CIN=1F, COUT=1F, unless otherwise specified.) PARAMETER Input Supply Voltage Range Output Voltage Shutdown Input Threshold Feedback Voltage (For L5200-ADJ) Output Ripple Voltage(For L5200-fixed) Operating Supply Current Shutdown Current Shutdown Input Current Feedback Input Current (For L5200-ADJ) Open-Loop Output Resistance Switching Frequency Efficiency (For UTC L5200-fixed) L5200-4.5V L5200-5.0V SYMBOL VIN VOUT VIH VIL VFB VR ICC I SHDN IIH IIL IFB ROL FOSC TEST CONDITIONS * IOUT100mA * * * * * * * * * MIN 2.7 4.41 4.9 1.3 1.217 TYP 4.5 5 MAX VOUT 4.59 5.1 0.4 1.319 8 1 1 1 50 UNIT V V V V V V mVP-P mA A A A nA MHz % ms
VIN=3V, IOUT=100mA IOUT=0mA, SHDN =VIN SHDN =0V, VOUT=0V SHDN =VIN SHDN =0V VFB=1.4V VIN=3V, IOUT=100mA VFB=0V (ROL (2VIN - VOUT)/IOUT)
1.268 30 3.5
-1 -1 -50 9.2 2 80 0.8
1 VIN=3V, IOUT=50mA VIN=3V, IOUT=0mA Soft Start Time tON 10%~90% Note: * stand for specifications which apply over the designed operating temperature range.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L5200
TYPICAL APPLICATION CIRCUIT
Regulated 5V Output from a 2.7V ~ VOUT Input
1F 4 C VIN 2 .7 V ~ VOUT 1F 5 2 3 OFF ON 6 C+ V OUT 1 1 F _ VOUT = 5 V + 2% , IOUT UP ~ 40 mA VIN 2 .7V , IOUT UP ~ 100 mA V IN 3 .1 V
CMOS IC
Output Ripple Voltage vs Load Current
40 V IN = 3V CFLY = 1 F Ta = 25 30 COUT = 1 F 20
_
VIN GND SHDN
OUTPUT RIP PLE (mVP -P)
10
COUT = 2.2 F
UTC L5200-5.0V
0
0
25
50
75
100
OUTPUT CURRENT (mA )
White or Blue LED Driver with LED Current Control ( UTC L5200-ADJ)
1F 1 2 3V ~ 4.4V Li - Ion BATTERY 1F FB ON OFF 6 SGND SHDN PGND 7 5 4 C VIN
+
3 CV OUT 8 1F 82 82 82 82 82 82 UP TO 6 LEDS
( APPLY PWM WAVEFORM FOR ADJUSTABLE BRIGHTNESS CONTROL )
VSHDN
t
USB Port to Regulated 5V Power Supply ( UTC L5200-5.0V)
1F 4 6
5 3 USB Port 1F
1
UTC L5200-5.0V
VOUT 1 F 5V2% 50mA
2
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L5200
TYPICAL CHARACTERISTICS (L5200-5.0V)
Output Voltage vs Supply Voltage
5.15 5.10
Output Voltage (V)
CMOS IC
Output Voltage vs Load Current
5.2 CIN = COUT = CFLY = 1 F Ta = 25
CIN = COUT = CFLY = 1 F IOUT = 20mA Ta = 85 Ta = 25 Ta = -40
5.1
Output Voltage (V)
5.05 5.00 4.95 4.90 4.85 2.7
5.0 VIN = 2.7V 4.9 VIN = 3V
VIN = 3.2V
3.0
3.3 3.6 3.9 Supply Voltage (V)
4.2
4.5
4.8
0
50
100 150 Load Current (mA)
200
No Load Supply Current vs Supply Voltage
6 CIN = COUT = CFLY = 1 F VSHDN = VIN
Oscillator Frequency (MHz)
Oscillator Frequency vs Supply Voltage
3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 Ta = -40 Ta = 85 Ta = 25
Supply Current (mA)
5
Ta = 25
Ta = 85 4 Ta = -40
3 2.7
3.0
3.3 3.6 3.9 Supply Voltage (V)
4.2
4.5
1.0
2.7
3.0
3.3
3.6
3.9
4.2
4.5
Supply Voltage (V)
VSHDN Threshold Voltage vs Supply Voltage
1.1 1.0 100 90 Ta = -40 Ta = 25 0.8 0.7 0.6 0.5 2.7 Ta = 85 80
Efficiency vs Load Current
CIN = COUT = CFLY = 1 F Ta = 25 VIN = 2.7V VIN = 3.2V VIN = 3.7V VIN = 4.5V
Threshold Voltage (V)
Efficiency (%)
0.9
70 60 50 40 30
3.0
3.3 3.6 3.9 Supply Voltage (V)
4.2
4.5
1
10 Load Current (mA)
100
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L5200
TYPICAL CHARACTERISTICS (L5200-5.0V) (cont.)
Short Circuit Current vs Supply Voltage
250 CFLY = 1 F Ta = 25 VOUT = 0V
CMOS IC
VOUT Soft-Start Ramp
VSHDN 2V/DIV
Output Current (mA)
200 VOUT 1V/DIV 150
100 2.7
3.0
3.3
3.6
3.9
4.2
4.5
VIN = 3V
200 s/DIV
Supply Voltage (V)
Output Ripple
VOUT (AC COUPLED) 20mV/DIV COUT = 1 F COUT = 3.3 F
Load Transient Response
IL 10mA ~ 90mA 50mA/DIV
COUT = 10 F
VOUT (AC COUPLED) 50mV/DIV VIN = 3.3V IL = 100mA 200ns/DIV VIN = 3.3V COUT = 1 F 10 s/DIV
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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