NDLI: Analysis of Microinductor Performance in a 20-100 MHz DC/DC Converter

Content Provider	IEEE Xplore Digital Library
Author	Meere, R. O'Donnell, T. Bergveld, H.J. Ningning Wang O'Mathuna, S.C.
Copyright Year	1986
Abstract	This paper presents a low-profile thin-film microfabricated inductor on silicon and its performance in a high-frequency low-power DC/DC converter. The design of the inductors has focused on maximizing efficiency while maintaining a relatively flat frequency response up to 30 MHz. The inductance at 20 MHz is approximately 150 nH with a resistance of 1.8 ¿. The performance of the microinductor has been compared to two conventional commercially available 150-nH chip inductors. One of the chip inductors has a magnetic-material core and the other is an air core. The maximum efficiency of the microinductor, which relates the power loss of the microinductor to output power loss of the converter, is measured to be approximately 93% at 20 MHz. The low-power DC/DC converter operates in the tens of milliwatts output power range, with an input voltage of 1.8 V and an output voltage programmable between 0 and 1.8 V. The converter maximum efficiency when using the microinductor on silicon is 78.5% at 20 MHz, which is approximately 2% lower than the efficiency using the conventional chip inductors.
Sponsorship	IEEE Power Electronics Society
Starting Page	2212
Ending Page	2218
Page Count	7
File Size	752450
File Format	PDF
ISSN	08858993
Volume Number	24
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance analysis DC-DC power converters Thin film inductors Silicon Magnetic cores Power generation Voltage Semiconductor thin films Frequency response Inductance magnetic-core inductors DC/DC conversion high frequency low profile
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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