Datasheet Details
| Part number | RT9903B |
|---|---|
| Manufacturer | Richtek Technology Corporation |
| File Size | 456.99 KB |
| Description | 4 Channel DC/DC Converters IC |
| Datasheet |
 RT9903B Datasheet
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General Description
The RT9903B is a complete power-supply solution for digital still cameras and other hand-held devices.
It integrates a high-efficiency fours step-up DC-DC converters and a charge pump.
Key Features
- z Two step-up DC-DC Converters (CH1, CH2) `HV Internal Switches `50mA Load Current One Step-up DC-DC Converter (CH3) `0.2V Reference Voltage `HV Internal Switches `LED Brightness Dimming Control `Over Voltage Protection One Step-up DC-DC Converter (CH4) `External Switches `External Current Limit Setting Up to 1.4MHz Switching Frequency 1μA Supply Current in Shutdown Mode External Compensation Network for All Converters Programmable Soft Start Function (CH1, CH2, CH3, CH4) Independent Enable Pin.