Preliminary
RT9902
4 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down
General Description
The RT9902 is a complete power supply solution for digital still cameras and other hand-held devices.
It integrates a high-efficiency main step-up DC-DC converter, two highefficiency step-down converters, a charge pump, and a linear controller that drives an external P-MOSFET for linear com
regulator.
The RT9902 is targeted for applications that use either two or three AA cells or a single lithiumion battery.
The main step-up DC-DC converter accepts inputs from 1.
5V to 5.
5V and build in 2.
6A Internal switch.
The two step-down DC-DC converters (CH2, CH3) accept inp...