BUY AO4421 https://www.utsource.net/itm/p/1041978.html
P-Channel Enhancement Mode Field Effect Transistor
The AO4421 is a dual N-Channel MOSFET from Alpha and Omega Semiconductor. It is a high-side and low-side driver with a maximum operating voltage of 20V and a maximum current of 4.5A. It is designed for high-side and low-side switching applications in automotive, industrial, and consumer applications. It features a low RDS(on) of 0.7mΩ and a low gate charge of 8.5nC. It has an integrated charge pump for improved gate drive and a logic level gate drive for low power consumption. The AO4421 is RoHS compliant and is available in a SOP-8 package. (For reference only)