General Description

The AAT1123 SwitchReg™ is a member of Skyworks Total Power Management IC (TPMIC™) product family. It is a 1MHz step-down converter with an input voltage range of 2.7V to 5.5V and output as low as 0.6V. Its low supply current, small size, and high switching frequency make the AAT1123 the ideal choice for portable applications.

Features

• VIN Range: 2.7V to 5.5V

• VOUT Adjustable Down to 0.6V

▪ Fixed or Adjustable Version

• Fast Turn-On Time (100μs Typical)

• 25μA No Load Quiescent Current

• Up to 97 Efficiency

• Output Current Up to 600mA

• 1MHz Switching Frequency

• Soft Start

• Over-Temperature Protection

• Current Limit Protection

• 100 Duty Cycle Low-Dropout Operation

• 0.1μA Shutdown Current

• SC70JW-8 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