A Non-isolated Voltage Regulator Module with Integrating Coupled-Inductor

With lower output voltage and higher output current demands, today´s VRM is almost based on interleaved multiphase buck converter, which requires strictly steady and dynamic performances to supply microprocessor. In this paper, a non-isolated multiphase VRM with integrating coupled magnetic is introduced to reduce magnetic component and improve steady state and dynamic performances. All these magnetic components can be coupled into a single ferrite core. By proper designing the gap of integrating coupled-inductor, this novel technique can greatly improve the performances of VRM with fast transient response and high efficiency. The simulation and experimental results of two-phase VRM show that integrating coupled-inductor can improve VRM´s steady and dynamic performances, compared with the conventional VRM