AAT2146

PRODUCT DATASHEET AAT2146 TM SwitchReg www.DataSheet4U.com Low Noise, Fast Transient 600mA Step-Down Converter Features VIN Range: 2.7V to 5.5V Low Noise Light Load Mode Low Ripple PWM Mode VOUT Fixed or Adjustable from 0.6V to VIN 37μA No Load Quiescent Current Up to 98% Efficiency 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 General Description The AAT2146 SwitchReg is a 2MHz 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 AAT2146 incorporates a unique low noise architecture which reduces ripple and spectral noise. The AAT2146 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 37μA no load quiescent current. The 2MHz switching frequency minimizes the size of external components while keeping switching losses low. The AAT2146 is designed to maintain high efficiency throughout the operating range, which is critical for portable applications. The AAT2146 is available in the Pb-free, space-saving 2.0x2.1mm SC70JW-8 package and is rated over the -40°C to +85°C temperature range. Applications ...