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RT9902 - 4 Channel DC/DC Converters IC

Description

The RT9902 is a complete power supply solution for digital still cameras and other hand-held devices.

Features

  • z z z z z z z z z z z z z z 1.5V to 5.5V Battery Input Voltage Range Main step-up DC-DC Converter `1.5V to 5.5V Adjustable Output Voltage `Up to 90% Efficiency `2.6A, 0.3Ω Internal Power Switch Two Step-Down DC-DC Converters `0.8V to 5.5V Adjustable Output Voltage `94% Efficiency `100% Duty Cycle Step-up Charge Pump for Micro-Controller Linear Controller for Linear Regulator Up to 1.4MHz Switching Frequency 1μA Supply Current in Shutdown Mode Programmable Soft Start Function Independent Enabl.

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Datasheet Details

Part number RT9902
Manufacturer Richtek Technology Corporation
File Size 561.46 KB
Description 4 Channel DC/DC Converters IC
Datasheet download datasheet RT9902 Datasheet

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Full PDF Text Transcription

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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 www.DataSheet4U.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 inputs from 1.5V to 5.5V and regulate a resistor adjustable output from 0.8V to 5.5V.
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