LTC3203EDD#PBF Analog Devices

LTC3203/LTC3203-1 LTC3203B/LTC3203B-1 500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps FEATURES DESCRIPTIO Selectable Dual Mode Operation: 1:1.5 or 1:2 The LTC 3203/LTC3203-1/LTC3203B/LTC3203B-1 are low High Output Current: Up to 500mA noise, high efficiency charge pump DC/DC converters Low Noise Constant Frequency (1MHz/0.9MHz) capable of driving loads up to 500mA from a 2.7V to 5.5V Operation* input. Low external parts count (two flying capacitors and V Range: 2.7V to 5.5V bypass capacitors at V and V ) make the LTC3203 IN IN OUT Adjustable Output Voltage (LTC3203/LTC3203B) family ideally suited for small, battery-powered applica- User Selectable Fixed Output Voltages: 4.5V or 5V tions. (LTC3203-1 and LTC3203B-1) Built-in soft-start circuitry prevents excessive inrush Burst Mode Operation with current during start-up. High switching frequency enables I ~ 120A (LTC3203/LTC3203-1) Q the use of small external capacitors. The LTC3203/ Constant Freqency Operation at All Loads LTC3203-1 feature Burst Mode operation at light load to (LTC3203B/LTC3203B-1) achieve high efficiency whereas the LTC3203B/ Soft-Start Limits Inrush Current at Turn-On LTC3203B-1 operate at constant frequency to achieve Short-Circuit/Thermal Protection lowest noise operation. Shutdown Disconnects Load from Input The LTC3203-1/LTC3203B-1 have a user selectable fixed Shutdown Current: < 1A output voltage of 4.5V or 5V to power LEDs or logic Available in a 10-pin (3mm 3mm) DFN Package circuits. The FB pin of the LTC3203/LTC3203B can be used U to program the desired output voltage. The parts are short- APPLICATIO S circuit and overtemperature protected and are available in High Current LED Backlight Supply for a low profile (3mm 3mm) DFN package. Cellphones/PDAs , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Cellphone Camera Light Supply Burst Mode is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. General Purpose 3.3V or Li-Ion to 5V Supply *Protected by U.S. Patents including 6411531. USB ON THE GO(OTG) Devices TYPICAL APPLICATIO Efficiency vs V at 300mA Load Current IN 100 ON/OFF OUTPUT PROGRAMMING 90 80 V V = 5V SHDN SEL OUT 70 LTC3203-1 V = 4.5V OUT V OUT V 60 IN V V IN OUT 500mA 10F + + 50 2.2F C1 C2 2.2F 2.2F 40 C1 C2 R1* 30 MODE GND 20 3203 F02 100k I V V *R1 10 OUT(MAX) SEL OUT 300mA LOW 4.5V 316k 0 300mA HIGH 5V 357k 2.5 3 4 4.5 5 5.5 3.5 500mA LOW 4.5V 357k V (V) IN 500mA HIGH 5V 402k 3203 G05 32031fa 1 EFFICIENCY (%) U ULTC3203/LTC3203-1 LTC3203B/LTC3203B-1 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW V , V to GND ......................................... 0.3V to 6V IN OUT + 10 C2 1 C1 MODE, V /FB, SHDN ..................... 0.3V to V +0.3V SEL IN V 2 9 GND OUT V Short Circuit Duration ............................. Indefinite OUT + C1 3 11 8 C2 I (Note 2)....................................................... 500mA OUT SHDN 4 7 V IN Operating Temperature Range (Note 3) ... 40C to 85C V /FB* 5 6 MODE SEL Storage Temperature Range .................. 65C to 125C DD PACKAGE 10-LEAD (3mm 3mm) PLASTIC DFN T = 125C, = 44C/W, = 3C/W JMAX JA JC EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB *V ON LTC3203-1/LTC3203B-1. FB ON LTC3203/LTC3203B SEL ORDER PART NUMBER DD PART MARKING LBQK LTC3203EDD LCFH LTC3203EDD-1 LCGY LTC3203BEDD-1 LTC3203BEDD LCGX Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: