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Limit Cycle Oscillation Reduction for Digital Low Dropout Regulators
Huang M.1; Lu Y.1; Sin S.-W.1; Seng P.1; Martins R.P.1; Ki W.-H.3
2016-09-01
Source PublicationIEEE Transactions on Circuits and Systems II: Express Briefs
ISSN15497747
Volume63Issue:9Pages:903-907
Abstract

The digital low dropout regulator (D-LDO) has drawn significant attention recently for its low-voltage operation and process-scalability. However, the D-LDO inherently suffers from limit cycle oscillation (LCO). To address this issue, the modes and amplitudes of LCO are calculated in this work and verified by SPICE simulation in a 65-nm CMOS process. An LCO reduction technique for the D-LDO is then proposed, by adding two unit power transistors in parallel with the main power MOS array as a feedforward path. This technique sets the LCO mode to 1 and effectively reduces the ripple amplitude for a wide (0.5-20 mA) load current range. When compared with the dead-zone scheme, this technique minimizes LCO with negligible circuit complexity and design difficulty.

KeywordCompensation Zero Describing Function Digital Control Feedforward Path Limit Cycle Oscillation (Lco) Low Dropout Regulator (Ldo) Sampled Nonlinear System
DOI10.1109/TCSII.2016.2534778
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000382684700019
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Citation statistics
Cited Times [WOS]:18   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorHuang M.; Lu Y.
Affiliation1.Universidade de Macau
2.Instituto Superior Técnico
3.Hong Kong University of Science and Technology
Recommended Citation
GB/T 7714
Huang M.,Lu Y.,Sin S.-W.,et al. Limit Cycle Oscillation Reduction for Digital Low Dropout Regulators[J]. IEEE Transactions on Circuits and Systems II: Express Briefs,2016,63(9):903-907.
APA Huang M.,Lu Y.,Sin S.-W.,Seng P.,Martins R.P.,&Ki W.-H..(2016).Limit Cycle Oscillation Reduction for Digital Low Dropout Regulators.IEEE Transactions on Circuits and Systems II: Express Briefs,63(9),903-907.
MLA Huang M.,et al."Limit Cycle Oscillation Reduction for Digital Low Dropout Regulators".IEEE Transactions on Circuits and Systems II: Express Briefs 63.9(2016):903-907.
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