APS1056

APS1056 Fast Transient 600mA Step-Down Converter General Description The APS1056 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 voltage as low as 0.6V. It is optimized to react quickly to a load variation. The APS1056 is available in fixed voltage versions with internal feedback and a programmable version with external feedback resistors. It can deliver 600mA 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 APS1056 is designed to maintain high efficiency throughout the operating range, which is critical for portable applications. The APS1056 is available in a Pb-free SOT23-5 package and is rated over the -40°C to +85°C temperature range. Features SwitchReg™ VIN Range: 2.7V to 5.5V VOUT Fixed or Adjustable from 0.6V to VIN 27µA No Load Quiescent Current Up to 98% Efficiency 600mA Max Output Current 1.4MHz Switching Frequency 120µs Soft Start Fast Load Transient Over-Temperature Protection Current Limit Protection 100% Duty Cycle Low-Dropout Operation <1µA Shutdown Current SOT23-5 Package Temperature Range: -40°C to +85°C Preliminary Information Applications Cellular Phones Digital Cameras Handheld Instruments Microprocessor / DSP Core / IO Power PDAs and Handheld Comp...