Size and performance tradeoffs in micro-inductors for high frequency DC-DC conversion

Ronan Meere; T. O'Donnell; N. Wang; N. Achotte; S. Kulkarni; S. C. O'Mathuna

doi:10.1109/TMAG.2009.2024544

Size and performance tradeoffs in micro-inductors for high frequency DC-DC conversion

Ronan Meere
, T. O'Donnell
, N. Wang
, N. Achotte
, S. Kulkarni
, S. C. O'Mathuna

Tyndall IPES (Integrated Power)

University College Cork

Research output: Contribution to journal › Article › peer-review

Abstract

This paper presents the design and measurement of optimized inductors-on-silicon ("micro-inductors") for use in high frequency dc-dc conversion applications. These ultra-compact low profile (< 70 μm) inductors range in area from 0.5-2.5 mm². 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/mm² for a 2.5 mm² area, 110 nH/mm² for 1.3 mm device and 82 nH/mm² for a 0.5 mm² footprint area. Measured saturation currents range from 0.15-0.5 A for the optimized devices.

Original language	English
Article number	5257146
Pages (from-to)	4234-4237
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	45
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2009.2024544
Publication status	Published - Oct 2009

Keywords

Density
Design tradeoffs
Enhancement
High frequency
Optimization

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10.1109/TMAG.2009.2024544

Cite this

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title = "Size and performance tradeoffs in micro-inductors for high frequency DC-DC conversion",

abstract = "This paper presents the design and measurement of optimized inductors-on-silicon ({"}micro-inductors{"}) for use in high frequency dc-dc conversion applications. These ultra-compact low profile (< 70 μm) inductors range in area from 0.5-2.5 mm2. 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/mm2 for a 2.5 mm2 area, 110 nH/mm2 for 1.3 mm device and 82 nH/mm2 for a 0.5 mm2 footprint area. Measured saturation currents range from 0.15-0.5 A for the optimized devices.",

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T1 - Size and performance tradeoffs in micro-inductors for high frequency DC-DC conversion

AU - Meere, Ronan

AU - O'Donnell, T.

AU - Wang, N.

AU - Achotte, N.

AU - Kulkarni, S.

AU - O'Mathuna, S. C.

PY - 2009/10

Y1 - 2009/10

N2 - This paper presents the design and measurement of optimized inductors-on-silicon ("micro-inductors") for use in high frequency dc-dc conversion applications. These ultra-compact low profile (< 70 μm) inductors range in area from 0.5-2.5 mm2. 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/mm2 for a 2.5 mm2 area, 110 nH/mm2 for 1.3 mm device and 82 nH/mm2 for a 0.5 mm2 footprint area. Measured saturation currents range from 0.15-0.5 A for the optimized devices.

AB - This paper presents the design and measurement of optimized inductors-on-silicon ("micro-inductors") for use in high frequency dc-dc conversion applications. These ultra-compact low profile (< 70 μm) inductors range in area from 0.5-2.5 mm2. 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/mm2 for a 2.5 mm2 area, 110 nH/mm2 for 1.3 mm device and 82 nH/mm2 for a 0.5 mm2 footprint area. Measured saturation currents range from 0.15-0.5 A for the optimized devices.

KW - Density

KW - Design tradeoffs

KW - Enhancement

KW - High frequency

KW - Optimization

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DO - 10.1109/TMAG.2009.2024544

M3 - Article

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VL - 45

SP - 4234

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 10

M1 - 5257146

ER -

Size and performance tradeoffs in micro-inductors for high frequency DC-DC conversion

Abstract

Keywords

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