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A Fully Integrated FVF-Based Low-Dropout Regulator with Wide Load Capacitance and Current Ranges
Huang,Mo1; Feng,Haigang2; Lu,Yan3
2019-12
Source PublicationIEEE Transactions on Power Electronics
ISSN0885-8993
Volume34Issue:12Pages:11880-11888
Abstract

The flipped-voltage-follower-based low-dropout regulator (LDO) has drawn attention for its fast response and reduced complexity, while super source follower can be combined to push the pole at the gate of the pass device to high frequency. But the maximum load current and minimum load capacitance of this topology are limited, especially when the poles and zero from the SSF are omitted in previous designs. This paper proposes a solution to extend the ranges of the load current and load capacitance, by implementing a small feed-forward capacitor ($C_{F}$) and a damping factor control circuitry. In addition, a slew rate enhancement circuit is applied to reduce the voltage undershoot. The proposed LDO is verified in a 65-nm CMOS process with 0.008 mm active area. The measured voltage undershoot is 80 mV with a load steps from 100 μA to 50 mA with 2-ns edge times, with no external capacitor. And the maximum load capacitance can be extended to 2 nF. A figure-of-merit of 0.8 mV is achieved.

KeywordAmplifier Damping Factor Control (Dfc) Feed-forward Flipped Voltage Follower (Fvf) Low-dropout Regulator (Ldo) Output Capacitorless (Ocl) Slew Rate Enhancement (Sre) Super Source Follower (Ssf)
DOI10.1109/TPEL.2019.2904622
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000485747300030
Scopus ID2-s2.0-85072290266
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Citation statistics
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
Corresponding AuthorLu,Yan
Affiliation1.School of Electronic and Information Engineering,South China University of Technology,Guangzhou,510630,China
2.Graduate School at Shenzhen,Tsinghua University,Shenzhen,518055,China
3.State Key Laboratory of Analog and Mixed-Signal VLSI,University of Macau,Taipa,Macao
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Huang,Mo,Feng,Haigang,Lu,Yan. A Fully Integrated FVF-Based Low-Dropout Regulator with Wide Load Capacitance and Current Ranges[J]. IEEE Transactions on Power Electronics, 2019, 34(12), 11880-11888.
APA Huang,Mo., Feng,Haigang., & Lu,Yan (2019). A Fully Integrated FVF-Based Low-Dropout Regulator with Wide Load Capacitance and Current Ranges. IEEE Transactions on Power Electronics, 34(12), 11880-11888.
MLA Huang,Mo,et al."A Fully Integrated FVF-Based Low-Dropout Regulator with Wide Load Capacitance and Current Ranges".IEEE Transactions on Power Electronics 34.12(2019):11880-11888.
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