Very high frequency integrated voltage regulator for small portable devices

As today's small portable devices (smartphones, tablets, etc.) becomes lighter, thinner, quicker, and smarter, the voltage regulator for the processor is expected to be efficient, miniaturized, integrated, and placed closer to the processor. In this paper, a concept of very high frequency (tens...

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Bibliographic Details
Published in2016 IEEE Energy Conversion Congress and Exposition (ECCE) pp. 1 - 7
Main Authors Dongbin Hou, Lee, Fred C., Qiang Li
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2016
Subjects
Core loss
Inductance
Inductors
Loss measurement
Magnetic cores
Regulators
Voltage control
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Summary:As today's small portable devices (smartphones, tablets, etc.) becomes lighter, thinner, quicker, and smarter, the voltage regulator for the processor is expected to be efficient, miniaturized, integrated, and placed closer to the processor. In this paper, a concept of very high frequency (tens of MHz) 3D integrated voltage regulator for small portable devices is proposed. Both single-phase and 5-phase integrated inductor with NEC flake magnetic material is designed, fabricated and experimentally tested at 20MHz, featuring simple single-via winding structure, small size, ultra-low profile, ultra-low DCR, air-gap-free magnetic core, and lateral non-uniform flux.
DOI:10.1109/ECCE.2016.7855555