Linear-Non-Linear Control Applied in Multiphase VRM

Abstract

Microprocessors are exigent loads that require specific power supplies, voltage regulator modules (VRM), that provide a well-regulated voltage, high efficiency and very good dynamic response. Multiphase interleaving synchronous buck converters are one of the best topological alternatives. In this paper a new approach to the non-linear control of multiphase VRMs is proposed. Thanks to the non-linear control, the proposed approach provides very good dynamic response and allows higher equivalent inductance values that other solutions, which means that, from the transient response point of view, the number of phases or the frequency can be reduced