General Description

The AAT1149 SwitchReg is a 3.0MHz step-down converter with an input voltage range of 2.7V to 5.5V and output voltage as low as 1.0V. It is optimized to react quickly to load variations and operate with a tiny 0603 inductor that is only 1mm tall.

特性 Features

? Ultra-Small 0603 Inductor (Height = 1mm)

? VIN Range: 2.7V to 5.5V

? VOUT Adjustable from 1.0V to VIN

? 400mA Max Output Current

? Up to 98 Efficiency

? 45μA No Load Quiescent Current

? 3.0MHz Switching Frequency

? 70μs Soft Start

? Fast Load Transient

? Over-Temperature Protection

? Current Limit Protection

? 100 Duty Cycle Low-Dropout Operation

? <1μA Shutdown Current

? SC70JW-8 or 0.9x1.2mm WLCSP 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