Sliding-mode control analog integrated circuit for switching DC-DC power converters

This communication describes the design and implementation of a microelectronic CMOS analog integrated circuit that provides versatile sliding-mode control laws for switching DC-DC power converters. In addition to perform general linear-surface state control laws, the controller circuit includes compensating dynamics. The proposal of this analog IC design, which operates in current-mode processing, exhibits good performance as far as operation speed, power consumption, suitability for low-voltage operation and robustness in front of interference are concerned. The main circuit, which allows modular connection, is composed of externally linearized transconductors based on current conveyors, current-mode amplifiers and filtering stages, and a transimpedance high-speed hysteretic comparator. Full-transistor-level post-layout simulations for a CMOS 0.8 μm technology and experimental results validate the high-speed functionality of the proposed sliding-mode controller ASIC implementation