The LTC3203EDD-1#PBF is a low noise dual mode step-up Charge Pump capable of driving loads up to 500mA from a 2.7 to 5.5V input. It uses a switched capacitor charge pump to boost VIN to a regulated output voltage. Low external parts count (two flying capacitors and bypass capacitors at VIN and VOUT) make the LTC3203 family ideally suited for small, battery-powered applications. Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. The LTC3203-1 feature Burst Mode? operation at light load to achieve high efficiency. The LTC3203-1 has an user selectable fixed output voltage of 4.5V or 5V to power LEDs or logic circuits.
- Selectable dual mode operation (1:1.5 or 1:2)
- High output current (up to 500mA)
- Low noise constant frequency (1/0.9MHz) operation
- User selectable fixed output voltages (4.5 or 5V)
- Automatic Burst Mode? operation with IQ ~ 120μA
- Soft-start limits inrush current at turn-on
- Short-circuit/thermal protection
- Shutdown disconnects load from input
- <1μA Shutdown current
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