The Al3351 power module is a type of power supply that can be directly installed on a printed circuit board. Its characteristic is to power specialized integrated circuits (ASIcs), digital signal processors (DSPS), microprocessors, memories, field programmable arrays (FPGAs), and other digital or analog loads- Generally speaking, the Al3351 module is referred to as a load (POL) power supply system or a point of use power supply system (PUPS). Due to the advantages of modular structure, it is widely used in communication fields such as switching devices, access devices, mobile communication, microwave communication, optical transmission, routers, automotive electronics, aerospace, etc.