AAT1110

Fast Transient 800mA Step-Down Converter General Description The AAT1110 SwitchReg™ is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product family. It is a 1.4MHz stepdown 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 AAT1110 the ideal choice for portable applications. The AAT1110 is available in either a fixed version with internal feedback or a programmable version with external feedback resistors. It can deliver up to 800mA of load current while maintaining a low 27µA no load quiescent current. The 1.4MHz switching frequency minimizes the size of external components while keeping switching losses low. The AAT1110 feedback and control delivers excellent load regulation and transient response with a small output inductor and capacitor. AAT1110 Features SwitchReg™ VIN Range: 2.7V to 5.5V VOUT Fixed or Adjustable from 0.6V to VIN 27µA No Load Quiescent Current Output Current Up to 800mA 1.4MHz Switching Frequency 120µs Soft Start Fast Load Transient Over-Temperature Protection Current Limit Protection 100% Duty Cycle Low-Dropout Operation <1µA of 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 The AAT1110 is designed to maintain high efficien cy throughout t...