AAT1120

500mA Step-Down Converter General Description The AAT1120 SwitchReg is a 1.5MHz step-down 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 AAT1120 the ideal choice for portable applications. The AAT1120 delivers up to 500mA of load current, while maintaining a low 30μA no load quiescent current. The 1.5MHz switching frequency minimizes the size of external components, while keeping switching losses low. The AAT1120 feedback and control delivers excellent load regulation and transient response with a small output inductor and capacitor. The AAT1120 is available in a Pb-free, 8-pin, 2x2mm STDFN package and is rated over the -40°C to +85°C temperature range. AAT1120 Features SwitchReg™ VIN Range: 2.7V to 5.5V VOUT Range: 0.6V to VIN Up to 500mA Output Current Up to 96% Efficiency 30μA Typical Quiescent Current 1.5MHz Switching Frequency Soft-Start Control Over-Temperature and Current Limit Protection 100% Duty Cycle Low-Dropout Operation <1μA Shutdown Current Small External Components Ultra-Small STDFN22-8 Package Temperature Range: -40°C to +85°C Applications Bluetooth® Headsets Cellular Phones Digital Cameras Handheld Instruments Micro Hard Disk Drive Portable Music Players USB Devices www.DataSheet4U.com Typical Application VIN AAT1120 VP VIN C1 4.7µF EN FB LX L1 3.0μH R1 118kΩ R2 59kΩ C2 4.7µF VO = 1.8V 500mA GND PGND 1...