Highfrequency digital PWM controller IC for DC-DC converters

Abstract—This paper describes a complete digital PWM con-troller IC for high-frequency switching converters. Novel archi-tecture and configurations of the key building blocks are A/D converter, compensator, and digital pulse-width modulator, are introduced to meet the requirements of tight output voltage regula-tion, high-speed dynamic response, and programmability without external passive components. The implementation techniques are experimentally verified on a prototype chip that takes less than 1 mm2 of silicon area in a standard 0.5 digital complementary metal oxide semiconductor (CMOS) process and operates at the switching frequency of 1 MHz. Index Terms—DC–DC switch-mode power conversion, digital control, digital pulse width modulation. I