A pseudo 9-bit 10 MSample/s hybrid Analog to Digital Converter ( ADC) is proposed for applying to digital power controller. It features its structure that consists of three 3-bit ADCs: a flash ADC and two delay-line based window ADCs. The first one works in the entire voltage range. And the other two only work in the desired voltage window to improve the resolution. The ADC is designed and simulated in TSMC 0.35-mu m mixed signal process. Simulation results show that the expected funtions are achieved.