Journal
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Volume 6, Issue 2, Pages 549-562Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2017.2741977
Keywords
IC; on-chip voltage regulator; optimization; power supply on-chip; resonant switched-capacitor converter (SCC); size efficiency; switched-resonator converters; zero-current switching (ZCS)
Categories
Funding
- Siliconix Division, Vishay Ltd.
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This paper details efficiency analysis and characteristics of a gyrator switched-resonator converter (GSwRC) IC. Followed by an efficiency analysis, this paper introduces an optimized size-efficiency design procedure for IC realization of the converter. In area-sensitive applications, the optimization method combined with the converter's benefits presents an attractive approach for power delivery in point-of- load applications. To verify the analytical framework, two sets of bridge-type GSwRCs prototypes have been evaluated. One is an on-chip bridge GSwRC that has been fabricated in 0.18-mu m 5-V CMOS process, according to the principles detailed in this paper, and verified through postlayout analysis and experimental measurements of the fabricated IC. The second prototype is a discrete GSwRC that is used for further validation of the theoretical framework. In addition, the analysis has been verified through a design example of a multiphase resonant switched-capacitor converter. The fabricated IC prototype operation is demonstrated with 1.5 A, delivering up to 2.25 W from 3-V input voltage, with peak efficiency at 85%. A fully monolithic controller to regulate the output voltage is described and implemented on-chip by an automated synthesis process and place-and-route tools.
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