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