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A comparative study of digital low dropout regulators
Huang,Mo1; Lu,Yan1; Martins,Rui P.1,2
Source PublicationJournal of Semiconductors

Granular power management in a power-efficient system on a chip (SoC) requires multiple integrated voltage regulators with a small area, process scalability, and low supply voltage. Conventional on-chip analog low-dropout regulators (ALDOs) can hardly meet these requirements, while digital LDOs (DLDOs) are good alternatives. However, the conventional DLDO, with synchronous control, has inherently slow transient response limited by the power-speed trade-off. Meanwhile, it has a poor power supply rejection (PSR), because the fully turned-on power switches in DLDO are vulnerable to power supply ripples. In this comparative study on DLDOs, first, we compare the pros and cons between ALDO and DLDO in general. Then, we summarize the recent DLDO advanced techniques for fast transient response and PSR enhancement. Finally, we discuss the design trends and possible directions of DLDO.

KeywordDigital Control Fast Transient Response Integrated Voltage Regulator Low Dropout Regulator (Ldo) Power Supply Rejection (Psr)
URLView the original
Indexed ByESCI
WOS Research AreaPhysics
WOS SubjectPhysics, Condensed Matter
WOS IDWOS:000587059400001
Scopus ID2-s2.0-85096311776
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Science and Technology
Corresponding AuthorHuang,Mo
Affiliation1.State Key Laboratory of Analog and Mixed-Signal Vlsi,Institute of Microelectronics,DECE/FST,University of Macau,Macao
2.Instituto Superior Técnico,Universidade de Lisboa,Lisbon,1049-001,Portugal
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Huang,Mo,Lu,Yan,Martins,Rui P.. A comparative study of digital low dropout regulators[J]. Journal of Semiconductors,2020,41(11).
APA Huang,Mo,Lu,Yan,&Martins,Rui P..(2020).A comparative study of digital low dropout regulators.Journal of Semiconductors,41(11).
MLA Huang,Mo,et al."A comparative study of digital low dropout regulators".Journal of Semiconductors 41.11(2020).
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