用于>5 V-1 V集成电压调节器的低损耗FeSi-FeNi电感器磁芯

Modern power delivery networks use buck-based DC-DC converters where inductors are used in energy storage and in maintaining continuous current to the load. While inductor design can partially address the rising power demands, enabling high conversion ratio integrated voltage regulators (IVRs) ultimately require novel magnetic materials with low loss and high frequency stability. In this work, we analyze soft magnetic composites (SMCs) made from FeSi and FeNi metal alloys for small signal and large signal losses at 0 DC, and large signal DC biasing (with in-situ temperature monitoring). The results are correlated with material properties such as filler morphology, surface packing, and DC resistivity. Loss metrics (racx and Racx) pertaining to inductors’ performance in buck-based IVRs, saturation magnetic energy density, and permeability of FeSi-FeNi cores are benchmarked with industry-grade magnetic cores used for power delivery.