NDLI: Thin-Film-Integrated Power Inductor on Si and Its Performance in an 8-MHz Buck Converter

Content Provider	IEEE Xplore Digital Library
Author	Ningning Wang O'Donnell, T. Meere, R. Rhen, F.M.F. Roy, S. O'Mathuna, S.C.
Copyright Year	1965
Abstract	This paper presents a microinductor fabricated on silicon using electrochemical techniques that has high efficiency in a low power dc-dc converter. Small signal measurements show a flat frequency response up to 20 MHz with a self resonant frequency of 130 MHz. The inductance at low frequency is approximately 440 nH with a dc resistance of 0.5 Omega , and a high quality factor of 11.7 at 5.5 MHz. The current handling capability test shows less than 10% decrease in inductance at 500-mA current. The performance of the microinductor has been compared to a conventional chip inductor in a commercially available 8-MHz buck converter. The converter maximum efficiency when using the microinductor is shown to be approximately 3% lower than the one using the conventional discrete chip inductor. However, the profile of the microinductor is much lower than that of the discrete chip inductor. The maximum efficiency of the microinductor in the converter is estimated to be approximately 92%.
Sponsorship	IEEE Magnetics Society
Starting Page	4096
Ending Page	4099
Page Count	4
File Size	593146
File Format	PDF
ISSN	00189464
Volume Number	44
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thin film inductors Buck converters Inductance Silicon DC-DC power converters Electrical resistance measurement Frequency measurement Frequency response Resonant frequency Q factor thin film inductors dc–dc power conversion monolithic integrated circuits
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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