Datasheet Summary
3MHz Fast Transient 400mA Step-Down Converter General Description
The AAT1149 SwitchReg is a 3.0MHz step-down converter with an input voltage range of 2.7V to 5.5V and output voltage as low as 1.0V. It is optimized to react quickly to load variations and operate with a tiny 0603 inductor that is only 1mm tall. The AAT1149 output voltage is programmable via external feedback resistors. It can deliver 400mA of load current while maintaining a low 45μA no load quiescent current. The 3.0MHz switching frequency minimizes the size of external ponents while keeping switching losses low. The AAT1149 maintains high efficiency throughout the operating range, which is critical for portable...
