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General Description

The AAT1142 SwitchReg is a dynamically programmable 2.2MHz step-down converter with an input voltage range of 2.7V to 5.5V and output from 0.6V to 2.0V. Its low supply current, high level of integration, and small footprint make the AAT1142 the ideal choice for microprocessor core power in systems such as smartphones.

Features

? VIN Range: 2.7V to 5.5V

? VOUT Programmable Range: 0.6V to 2.0V

? Dynamic Voltage Management:

? 50mV Output Resolution

? Fast, Stable Response

? Serial Control Options:

? I2C Two-Wire Interface

? S2Cwire Single-Wire Interface

? 800mA Output Current

? Up to 93 Efficiency

? Line, Load Regulation Less Than ±0.5

? 2.2MHz Switching Frequency

? Ultra-Small External Filter

? Low 35μA No Load Quiescent Current

? 100 Duty Cycle Low Dropout Operation

? Internal Soft Start

? Over-Temperature Protection

? Current Limit Protection

? Multi-Function MODE/SYNC Pin:

? PFM/PWM for High Efficiency

? PWM Only for Low Noise

? Clock Input to Synchronize to System Clock

? TSOPJW-12 or TDFN33-12 Package

? Temperature Range: -40°C to +85°C

Applications

? Camcorders

? Cellular Phones and Smartphones

? Digital Still Cameras

? Handheld Instruments

? Microprocessor / DSP Core

? MP3, Portable Music, and Portable Media Players

? PDAs and Handheld Computers