A Simple Ramp Generator With an Active Ramp Tracking Control For a Fast Response PWM Buck Converter

In this paper, a simple ramp generator with an active ramp tracking control (ARTC) for a fast response PWM buck converter is proposed. It simplifies two amplifiers and two analog level shifters in the conventional ramp generator with the ARTC to a single amplifier. The area and power of the proposed ramp generator are reduced to 31% and 44% compared to the conventional ramp generator with the ARTC. The PWM buck converter with the proposed ramp generator was fabricated in a 1.8V 65nm CMOS process.