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A Dual-Loop Digital LDO Regulator with Asynchronous-Flash Binary Coarse Tuning
Huang Y.3; Lu Y.3; Maloberti F.2; Martins R.P.3
2018-04-26
Conference NameIEEE International Symposium on Circuits and Systems (ISCAS)
Source PublicationProceedings - IEEE International Symposium on Circuits and Systems
Volume2018-May
Conference DateMAY 27-30, 2018
Conference PlaceFlorence, ITALY
Abstract

This paper presents a dual-loop digital low-dropout regulator (DLDO) with asynchronous-flash (AF) binary coarse tuning for fast transient response. In steady state, the DLDO operates with a unary-weighted low power fine-tune loop to improve the regulation accuracy. Besides, a freeze mode is also employed to further reduce the power budget and to eliminate the limit cycle oscillation phenomenon. When a load-transient is detected, the proposed AF bidirectional shift register will direct the binary-weighted power switches for coarse and fast tuning. The prototype is fabricated in a 28nm bulk CMOS process. With V=0.5V and 50mV dropout, the AF-DLDO can deliver 33mA output current and consume only 10.5μA quiescent current. We measured 102mV voltage undershoot for a 30mA/20ns load step, showing a 0.11ps FOM.

KeywordAsynchronous Flash Coarse Tuning Digital Low-dropout Regulator Ldo Power Management
DOI10.1109/ISCAS.2018.8351669
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000451218703117
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionINSTITUTE OF MICROELECTRONICS
Affiliation1.Instituto Superior Técnico
2.Università degli Studi di Pavia
3.Universidade de Macau
Recommended Citation
GB/T 7714
Huang Y.,Lu Y.,Maloberti F.,et al. A Dual-Loop Digital LDO Regulator with Asynchronous-Flash Binary Coarse Tuning[C],2018.
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