Permanent Magnet Coupled Power Inductor for Multi-phase DC-DC Switching Power Converters

A permanent magnet on-chip power inductor (PMOI) consisting of a spiral design and a multi-stage permanent magnet. The design utilizes a permanent magnet to generate a flux cancellation effect which aids in yielding a 100 percent increase in the saturation current. This design reduces the total power inductor size to half for the same inductance value, and/or doubles the inductance density.