AR4SC Power Management IC

The AR4SC is a power management integrated circuit (IC),the Richtek (RT) controller family. It is commonly used in laptop and motherboard power sections for DC/DC voltage regulation, CPU core supply, and system power sequencing. Though the exact model identification is unclear, it is widely recognized as a compact switching controller or power stage IC in modern notebook designs.

Power management or DC/DC controller IC (suspected RT / Richtek family)

Compact SMD / QFN package for efficient PCB design

High-performance switching regulator with low power loss

Used in laptop VRM, GPU, and chipset power circuits

Stable voltage regulation under variable load

Built-in protection: OCP, OTP, and UVP (common to Richtek ICs)

Suitable for notebooks, mini-PCs, and embedded devices

IC ready stock OKSpare, IC available at OKSpare, and IC supplier OKSpare