General Description

The AAT1112 SwitchReg is a 1.5A step-down converter with an input voltage range of 2.4V to 5.5V and an adjustable output voltage from 0.6V to VIN. The 1.4MHz switching frequency enables the use of small external components. The small footprint and high efficiency make the AAT1112 an ideal choice for portable applications.

Features

• 1.5A Maximum Output Current

• Input Voltage: 2.4V to 5.5V

• Output Voltage: 0.6V to VIN

• Up to 95 Efficiency

• 42μA No Load Quiescent Current

• No External Compensation Required

• 1.4MHz Switching Frequency

• Synchronizable to External Clock

• Optional “PWM Only” Low Noise Mode

• 100 Duty Cycle Low-Dropout Operation

• Internal Soft Start

• Over-Temperature and Current Limit Protection

• <1μA Shutdown Current

• TSOPJW-12 or TDFN33-12 Package

• Temperature Range: -40°C to +85°C

Applications

• Cellular Phones

• Digital Cameras

• Hard Disk Drives

• MP3 Players

• PDAs and Handheld Computers

• Portable Media Players

• USB Devices