Design methodology for dynamic voltage scaling in the buck converter

Abstract

Dynamic voltage scaling is a technique that reduces the energy consumption in electronics systems. This paper deals with the design of the buck converter to meet dynamic voltage specifications and regulation under load current steps. A design methodology is proposed. Filter designs, number of interleaved phases, optimum switching frequency and control speed are key parameters that are taken into account in this methodology. The minimum time control law enables the maximum inductance design at the optimum switching frequency, thus, maximizing the efficiency of the converter. This methodology is applied to a particular specification for dynamic voltage scaling and a prototype is built to validate the concepts