AAT2146W

DATA SHEET AAT2146W Low-Noise, Fast Transient 600mA Step-Down Converter General Description The AAT2146W SwitchReg is a 2MHz fixed frequency step-down 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 AAT2146W is ideal for applications where fixed frequency and low ripple voltage are required over the full range of load conditions. The AAT2146W is programmable with external feedback resistors. It can deliver 600mA of load current while maintaining a low 150μA no-load quiescent current. The 2MHz switching frequency minimizes the size of external components while keeping switching losses low. The AAT2146W is designed to maintain high efficiency throughout the operating range, which is critical for portable applications. The AAT2146W is available in the Pb-free, space-saving 2.0x2.2mm SC70JW-8 package and is rated over the -40°C to +85°C temperature range. Features VIN Range: 2.7V to 5.5V Low Ripple Voltage Fixed Frequency PWM Mode VOUT Adjustable from 0.6V to VIN Efficiency up to 96% 600mA Max Output Current 2MHz Switching Frequency 150μs Soft Start Fast Load Transient Over-Temperature Protection Current Limit Protection 100% Duty Cycle Low-Dropout Operation <1μA 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 Han...