UM
A Fully Integrated Low-Dropout Regulator with Differentiator-Based Active Zero Compensation
Bu S.2; Leung K.N.3; Lu Y.5; Guo J.1; Zheng Y.4
2018-10-01
Source PublicationIEEE Transactions on Circuits and Systems I: Regular Papers
ISSN15498328
Volume65Issue:10Pages:3578-3591
AbstractAn area-efficient low-power fully integrated output-capacitorless low-dropout regulator (OCL-LDO) is presented in this paper. The three-stage OCL-LDO utilizes an embedded differentiator-based active zero compensation technique together with adaptive biasing. The proposed active zero compensation helps enhance the unity-gain bandwidth (UGB) of the regulator with very small silicon area and almost no extra current consumption. The UGB is therefore able to be maintained above 2.5 MHz even at a measured quiescent current of mere 1.6μ A. Adaptive bias is employed to further stabilize the circuit and extend the bandwidth extension as well as enhance the transient response. The chip area is 0.0021 mm with maximum load capability of 25 mA, which leads to a maximum current density of 11.9 A/mm. The measured voltage spikes are below 40 mV for full-load transient responses, and the response time is about 1.2 ns. The voltage spikes of line transient responses are only 4 mV at full load. The measured full-load power-supply rejection is better than -44 dB up to 100 kHz.
Keywordarea-efficient current density frequency compensation Low-dropout regulator Miller compensation power management
DOI10.1109/TCSI.2018.2833162
URLView the original
Language英語
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Cited Times [WOS]:11   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Sun Yat-Sen University
2.University of California, Los Angeles
3.Chinese University of Hong Kong
4.South China University of Technology
5.Universidade de Macau
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GB/T 7714
Bu S.,Leung K.N.,Lu Y.,et al. A Fully Integrated Low-Dropout Regulator with Differentiator-Based Active Zero Compensation[J]. IEEE Transactions on Circuits and Systems I: Regular Papers,2018,65(10):3578-3591.
APA Bu S.,Leung K.N.,Lu Y.,Guo J.,&Zheng Y..(2018).A Fully Integrated Low-Dropout Regulator with Differentiator-Based Active Zero Compensation.IEEE Transactions on Circuits and Systems I: Regular Papers,65(10),3578-3591.
MLA Bu S.,et al."A Fully Integrated Low-Dropout Regulator with Differentiator-Based Active Zero Compensation".IEEE Transactions on Circuits and Systems I: Regular Papers 65.10(2018):3578-3591.
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