The STMicroelectronics PM8903ATR is a 3A step-down monolithic switching regulator. It offers an adjustable output voltage down to 0.6V and operates at a switching frequency of 1.1MHz.
The STMicroelectronics PM8903 is a high-efficiency, monolithic step-down switching regulator designed to deliver up to 3A continuous current. It operates from a 2.8V to 6V input voltage.