| Autor: |
Kyuwoon Hwang, Xiaosong Wu, Preston Galle, Mark G. Allen, Peter Smeys, Peter Johnson, Peter J. Hopper, Seong-Hyok Kim, L. Milner |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
2007 Proceedings 57th Electronic Components and Technology Conference. |
| DOI: |
10.1109/ectc.2007.374056 |
| Popis: |
A CMOS-compatible microfabricated inductor is presented. The inductor consists of a planar spiral coil optionally sandwiched between upper and lower magnetic core layers. Core materials investigated include ferrite-filled polymer and electrodeposited nickel-iron permalloy (Ni0.80Fe0.20).Four core constructions were investigated: air-core (i.e., no magnetic material); lower permalloy core with upper air core; lower permalloy core with upper ferrite polymer core; and lower and upper permalloy core. In all cases with magnetic cores, a nominal magnetic air gap of 2 microns was utilized. As expected, the all-permalloy construction yielded the highest inductance. Inductors were characterized both by impedance analysis as well as in a prototype buck DC-DC conversion circuit. When the converter was operated at 5 MHz, peak efficiency of 82% and an efficiency of 80% at a load current of 2.5 A and output voltage of 2 V was obtained. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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