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General Description

The AAT1140 SwitchReg is a 1.4MHz step-down converter with an input voltage range of 2.7V to 5.5V and output voltage as low as 0.6V. It is optimized to react quickly to a load variation.

Features

? VIN Range: 2.7V to 5.5V

? VOUT Fixed or Adjustable from 0.6V to VIN

? 35μA No Load Quiescent Current

? Up to 98 Efficiency

? 600mA Max Output Current

? 1.4MHz Switching Frequency

? 120μs Soft Start

? Fast Load Transient

? Over-Temperature Protection

? Current Limit Protection

? 100 Duty Cycle Low-Dropout Operation

? <1μA Shutdown Current

? SOT23-5 Package

? Temperature Range: -40°C to +85°C

Applications

? Cellular Phones

? Digital Cameras

? Handheld Instruments

? Microprocessor / DSP Core / IO Power

? PDAs and Handheld Computers

? USB Devices