UP6111A uP6111A Single-Phase PWM Controller IC

The UP6111A (uP6111A) is a high-performance single-phase PWM (Pulse Width Modulation) controller IC manufactured by uPI Semiconductor, designed for efficient voltage regulation in modern electronic systems. It is primarily used in laptop motherboards and graphics cards, where it controls external MOSFETs to deliver stable and efficient power to critical components such as CPUs, GPUs, and memory-related power rails. Often paired with compatible MOSFETs (such as SI7326DN), the UP6111A provides accurate duty-cycle control, fast transient response, and reliable operation under varying load conditions, making it a trusted solution for compact and high-efficiency VRM designs.