BUY PS21997-AST https://www.utsource.net/itm/p/8646848.html

The PS21997-AST is a module manufactured by Mitsubishi. It is a power supply module with a voltage range of 3.3V to 5V. It is designed to provide a regulated output voltage and current for a variety of applications. It has a high efficiency and low noise operation, and is suitable for use in industrial, automotive, and consumer electronics applications. It features a wide operating temperature range of -40°C to +85°C, and is RoHS compliant. (For reference only)