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LTC3203-1 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3203-1 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC3203/LTC3203-1 LTC3203B/LTC3203B-1 1 32031fa APPLICATIO S TYPICAL APPLICATIO FEATURES DESCRIPTIO The LTC ®3203/LTC3203-1/LTC3203B/LTC3203B-1arelow noise, high efficiency charge pump DC/DC converters capable of driving loads up to 500mA from a 2.7V to 5.5V input. Low external parts count (two flying capacitors and bypass capacitors at VIN and VOUT) make the LTC3203 family ideally suited for small, battery-powered applica- tions. Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. The LTC3203/ LTC3203-1 feature Burst Mode operation at light load to achieve high efficiency whereas the LTC3203B/ LTC3203B-1 operate at constant frequency to achieve lowest noise operation. The LTC3203-1/LTC3203B-1 have a user selectable fixed output voltage of 4.5V or 5V to power LEDs or logic circuits. The FB pin of the LTC3203/LTC3203B can be used to program the desired output voltage. The parts are short- circuit and overtemperature protected and are available in a low profile (3mm × 3mm) DFN package. ■ High Current LED Backlight Supply for Cellphones/PDAs ■ Cellphone Camera Light Supply ■ General Purpose 3.3V or Li-Ion to 5V Supply ■ USB ON THE GO(OTG) Devices ■ Selectable Dual Mode Operation: 1:1.5 or 1:2 ■ High Output Current: Up to 500mA ■ Low Noise Constant Frequency (1MHz/0.9MHz) Operation* ■ VIN Range: 2.7V to 5.5V ■ Adjustable Output Voltage (LTC3203/LTC3203B) ■ User Selectable Fixed Output Voltages: 4.5V or 5V (LTC3203-1 and LTC3203B-1) ■ Burst Mode ® Operation with IQ ~ 120µA (LTC3203/LTC3203-1) ■ Constant Freqency Operation at All Loads (LTC3203B/LTC3203B-1) ■ Soft-Start Limits Inrush Current at Turn-On ■ Short-Circuit/Thermal Protection ■ Shutdown Disconnects Load from Input ■ Shutdown Current: < 1 µA ■ Available in a 10-pin (3mm × 3mm) DFN Package 500mA Output Current Low Noise Dual Mode Step-Up Charge Pumps 3203 F02 LTC3203-1 ON/OFF OUTPUT PROGRAMMING VSEL 500mA SHDN MODE GND VOUT VOUT VIN VIN C1+ C1– C2– C2+ 2.2 µF 2.2 µF 2.2 µF 10 µF R1* 100k IOUT(MAX) 300mA 300mA 500mA 500mA VSEL LOW HIGH LOW HIGH VOUT 4.5V 5V 4.5V 5V *R1 316k 357k 357k 402k VIN (V) 2.5 0 20 40 60 3 3.5 4 4.5 3203 G05 5 80 100 10 30 50 70 90 5.5 VOUT = 4.5V VOUT = 5V Efficiency vs VIN at 300mA Load Current , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Protected by U.S. Patents including 6411531. |
Similar Part No. - LTC3203-1_15 |
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Similar Description - LTC3203-1_15 |
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