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Digital 2-/3-Phase Switched-Capacitor Converter with Ripple Reduction and Efficiency Improvement
Jiang J.1; Ki W.-H.1; Lu Y.2
2017-07-01
Source PublicationIEEE Journal of Solid-State Circuits
ISSN00189200
Volume52Issue:7Pages:1836-1848
Abstract

This paper presents a digitally controlled 2-/3-phase 6-ratio switched-capacitor (SC) dc-dc converter with low output voltage ripple and high efficiency. To achieve wide input and output voltage ranges, six voltage conversion ratios are generated with only two discrete flying capacitors by using both 2- A nd 3-phase operations. An adaptive ripple reduction scheme is proposed to achieve up to four times reduction in the output voltage ripple. The complexity of controller design is reduced by using digital synthesis, and the technique is scalable with process. Fast loop response is achieved by using synchronized hysteretic control. The SC converter was fabricated in a 0.13-μm CMOS process. It can deliver a maximum power of 250 mW to an output of 0.5-3 V with a wide input voltage range of 1.6-3.3 V. Compared to an SC converter with only 2-phase operation, the maximum efficiency improvement is 20%. The converter achieves a peak efficiency of 91%.

Keyword2-/3-phase 3-phase Adaptive Ripple Reduction Dc-dc Converter Digitally Controlled Efficiency Improvements Sc Converter Switched-capacitor (Sc) Voltage Conversion Ratio Voltage Regulator
DOI10.1109/JSSC.2017.2679065
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000404301300011
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Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
Corresponding AuthorJiang J.; Ki W.-H.; Lu Y.
Affiliation1.Hong Kong University of Science and Technology
2.Universidade de Macau
Recommended Citation
GB/T 7714
Jiang J.,Ki W.-H.,Lu Y.. Digital 2-/3-Phase Switched-Capacitor Converter with Ripple Reduction and Efficiency Improvement[J]. IEEE Journal of Solid-State Circuits,2017,52(7):1836-1848.
APA Jiang J.,Ki W.-H.,&Lu Y..(2017).Digital 2-/3-Phase Switched-Capacitor Converter with Ripple Reduction and Efficiency Improvement.IEEE Journal of Solid-State Circuits,52(7),1836-1848.
MLA Jiang J.,et al."Digital 2-/3-Phase Switched-Capacitor Converter with Ripple Reduction and Efficiency Improvement".IEEE Journal of Solid-State Circuits 52.7(2017):1836-1848.
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