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An NMOS-LDO Regulated Switched-Capacitor DC-DC Converter with Fast-Response Adaptive-Phase Digital Control
Lu Y.1; Ki W.-H.2; Patrick Yue C.2
2016-02-01
Source PublicationIEEE Transactions on Power Electronics
ISSN08858993
Volume31Issue:2Pages:1294-1303
Abstract

A fully integrated low-dropout-regulated step-down multiphase-switched-capacitor DC-DC converter (a.k.a. charge pump, CP) with a fast-response adaptive-phase (Fast-RAP) digital controller is designed using a 65-nm CMOS process. Different from conventional designs, a low-dropout regulator (LDO) with an NMOS power stage is used without the need for an additional step-up CP for driving. A clock tripler and a pulse divider are proposed to enable the Fast-RAP control. As the Fast-RAP digital controller is designed to be able to respond faster than the cascaded linear regulator, transient response will not be affected by the adaptive scheme. Thus, light-load efficiency is improved without sacrificing the response time. When the CP operates at 90 MHz with 80.3% CP efficiency, only small ripples would appear on the CP output with the 18-phase interleaving scheme, and be further attenuated at V by the 50-mV dropout regulator with only 4.1% efficiency overhead and 6.5% area overhead. The output ripple is less than 2 mV for a load current of 20 mA.

KeywordDc-dc Converter Digital Controller Low Dropout Regulator (Ldo) Power Supply Rejection (Psr) Switched Capacitor Power Converter (Scpc) Voltage Regulator
DOI10.1109/TPEL.2015.2420572
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEnglish
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000362364000031
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Citation statistics
Cited Times [WOS]:31   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
Corresponding AuthorLu Y.; Ki W.-H.; Patrick Yue C.
Affiliation1.State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macao, China
2.Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Lu Y.,Ki W.-H.,Patrick Yue C.. An NMOS-LDO Regulated Switched-Capacitor DC-DC Converter with Fast-Response Adaptive-Phase Digital Control[J]. IEEE Transactions on Power Electronics,2016,31(2):1294-1303.
APA Lu Y.,Ki W.-H.,&Patrick Yue C..(2016).An NMOS-LDO Regulated Switched-Capacitor DC-DC Converter with Fast-Response Adaptive-Phase Digital Control.IEEE Transactions on Power Electronics,31(2),1294-1303.
MLA Lu Y.,et al."An NMOS-LDO Regulated Switched-Capacitor DC-DC Converter with Fast-Response Adaptive-Phase Digital Control".IEEE Transactions on Power Electronics 31.2(2016):1294-1303.
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