3 / 2016-06-28 16:23:22

Study of PCB routing loss for Coupled Inductor based VR(Voltage Regulator) design in Server Computing System

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Coupled inductor is one appealing technology to improve transient response and reduce output decoupling significantly in interleaved multi-phase voltage regulators (VRs). One well known problem is that couple inductor winding structure causes PCB routing path longer than discrete inductor design. This paper investigates possible PCB routing schemes for couple inductor and conducts a fair and quantitative comparison with discrete inductor in a server VR design. Simulation and measurement is also conducted to verify the analysis.