Design of a fully-integrated buck voltage regulator using standard CMOS technology

This paper presents the design of a fully-integrated buck voltage regulator using standard 0.18 μm CMOS technology. The converter employs a dual-phase structure to minimize the output ripple. The controller is implemented using a hysteretic architecture based on sliding-mode theory. The external low-pass filter has been fully-integrated by increasing the switching frequency up to 45 MHz. The proposed converter is a monolithic solution, based on standard CMOS technology, for integration of passive components on-chip without the need of expensive and complicated post-fabrication processes. The regulator operates with an input voltage of 1.8 V, generates an output voltage of 1 V, supplies a maximum current of 400 mA, and delivers 53% power efficiency.