STMicroelectronics ST1PS01 Synchronous Step-Down Converter is a nano-quiescent miniaturized synchronous step-down converter. This device is able to provide up to 400mA output current with an input voltage ranging from 1.8V to 5.5V. This converter is specifically designed for applications where high efficiency, PCB size, and thickness are the key factors. The output voltage can be set using two digital control inputs, a VOUT from 1.8V to 3.3V can be dynamically selected. Thanks to the enhanced PCC (peak current control) the ST1PS01 reaches very high-efficiency conversion using just a 2.2µH inductor and two small capacitors. Advanced design circuitry is implemented to minimize the quiescent current.