Current feedback compensation (CFC) technique for adaptively adjusting the phase margin in capacitor-free LDO regulators

Huan Chien Yang*, Han Hsiang Huang, Chi Lin Chen, Ming Hsin Huang, Ke-Horng Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Current feedback compensation technique (CFC) can adaptively adjust the phase margin for achieving better transient response than that with variant phase margin at different load current conditions. Not only fast transient response is attained due to suitable phase margin but also the minimum load current limitation can be greatly reduced to about 50A without sacrificing bandwidth at light load current condition. Besides, CFC technique can have high PSRR bandwidth with compatible compensation capacitors compared to the Q-reduction technique [6]. The capacitor-free LDO regulator with CFC technique is fabricated by TSMC 0.35m 2P4M CMOS process with small compensation capacitors 5pF and 1.5pF. Experimental results demonstrate that the minimum load can be reduced to 50A and transient response time with adaptively phase margin control is smaller than 1 s.

Original languageEnglish
Title of host publication2008 IEEE International 51st Midwest Symposium on Circuits and Systems, MWSCAS
Pages5-8
Number of pages4
DOIs
StatePublished - 27 Oct 2008
Event2008 IEEE International 51st Midwest Symposium on Circuits and Systems, MWSCAS - Knoxville, TN, United States
Duration: 10 Aug 200813 Aug 2008

Publication series

NameMidwest Symposium on Circuits and Systems
ISSN (Print)1548-3746

Conference

Conference2008 IEEE International 51st Midwest Symposium on Circuits and Systems, MWSCAS
CountryUnited States
CityKnoxville, TN
Period10/08/0813/08/08

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  • Cite this

    Yang, H. C., Huang, H. H., Chen, C. L., Huang, M. H., & Chen, K-H. (2008). Current feedback compensation (CFC) technique for adaptively adjusting the phase margin in capacitor-free LDO regulators. In 2008 IEEE International 51st Midwest Symposium on Circuits and Systems, MWSCAS (pp. 5-8). [4616722] (Midwest Symposium on Circuits and Systems). https://doi.org/10.1109/MWSCAS.2008.4616722