A new voltage regulator module with integrating coupled magnetic

Multiphase interleaving synchronous buck converter is widely adopted for voltage regulator module (VRM), which requires strictly steady and dynamic performances to power microprocessor. In this paper, a new non-isolated multiphase VRM with integrating coupled magnetic is introduced to improve steady and dynamic performances. Firstly, a integrating coupled magnetic is modelled by gyrator-capacitor approach. Then all these magnetic components can be coupled into one single ferrite core shape to reduce the magnetic size. By proper designing the air gap and coupling coefficient of integrating coupled-inductor, this new technique can greatly improve the performances of VRM with faster transient response and lower output ripple current. The Matlab simulation and 1.5 V/40 A prototype experimental results of two-phase VRM show that integrating coupled inductor can improve steady and dynamic performances.