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The ST1PS01 from STMicroelectronics is a synchronous step-down converter IC which provides a maximum output current of 400mA from an input at a voltage between 1.8V and 5.5V.
It is notable for its ultra-low quiescent current and when not switching, it draws just 500nA at an input voltage of 3.6V.
Housed in an 8-ball fl ip-chip package measuring 1.14mm x 1.44mm, it is intended for use in product designs that require a small and thin PCB, and which benefit from the device’s high conversion efficiency.
Using an enhanced peak-current control topology, the ST1PS01 achieves very high efficiency using an inductor of just 2.2μH and two small capacitors. It reaches 94% efficiency when supplying a 1mA load, and stepping a 3.6V input down to an output of 3.3V.
The output voltage can be set dynamically using two digital control inputs. ST supplies the converter in three versions, each providing a different set of output-voltage selection options:
The STEVAL-1PS01AJR evaluation board features the ST1PS01 synchronous step-down converter for applications in which high efficiency and PCB size and thickness are important.
ST1PS01: Up to 94% conversion efficiency
