Size and Performance Tradeoffs in Micro-Inductors for High Frequency DC-DC Conversion

This paper presents the design and measurement of optimized inductors-on-silicon (ldquomicro-inductorsrdquo) for use in high frequency DC-DC conversion applications. These ultra-compact low profile (< 70 mum) inductors range in area from 0.5-2.5 mm 2 . The design process utilizes optimization sof...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2009-10, Vol.45 (10), p.4234-4237
Main Authors: Meere, R., O'Donnell, T., Wang, N., Achotte, N., Kulkarni, S., O'Mathuna, S.C.
Format: Article
Language:English
Subjects:
Application software
Area measurement
Constraint optimization
Conversion
Density
Density measurement
Design optimization
design tradeoffs
Devices
enhancement
Frequency conversion
Frequency measurement
High frequencies
high frequency
Inductance
Inductance measurement
Inductors
Magnetism
Optimization
Process design
Saturation
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Summary:This paper presents the design and measurement of optimized inductors-on-silicon (ldquomicro-inductorsrdquo) for use in high frequency DC-DC conversion applications. These ultra-compact low profile (< 70 mum) inductors range in area from 0.5-2.5 mm 2 . The design process utilizes optimization software that finds the optimal physical dimensions, to maximize inductor efficiency, given certain technology constraints. Optimized micro-inductors achieve measured inductance densities of 66 nH/mm 2 for a 2.5 mm 2 area, 110 nH/mm 2 for 1.3 mm 2 device and 82 nH/mm 2 for a 0.5 mm 2 footprint area. Measured saturation currents range from 0.15-0.5 A for the optimized devices.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2009.2024544