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A Fast Response Digital Low-Dropout Regulator Based on Enhanced Analog Assisted Loop
Chen, Ruipeng1; Zhou, Shaolin1; Wu, Zhaohui1; Li, Bin1; Huang, Mo2
2021-01
Conference Name2020 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)
Source PublicationProceedings of 2020 IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2020
Pages55-56
Conference Date23-25 Nov. 2020
Conference PlaceNanjing, China
Abstract

The digital low-dropout (D-LDO) regulator can work effectively in low supply voltage. It is appropriate for the digital circuits due to great process scalability. However, D-LDOs suffer a poor transient response caused by the limited sampling clock and the logic delays. Therefore, the transient performance needs to be improved. One of the solutions is getting rid of the control scheme related to synchronous clock. This paper presents an enhanced analog assisted (E-AA) technique for D-LDOs to reduce the voltage spikes. The proposed technique adds a current buffer (CB) and a switch compensated resistor (SCR) into the conventional passive analog assisted loop. The CB is used to amplify the loop gain. The SCR is used to prevent a second droop of output voltage during recovery. The simulation results show that a maximum voltage undershoot is 16.4 mV with a 5 mA/3.8 ns load step and a total capacitor is only 52 pF. Thus, the resulting figure-of-merit (FoM) is 0.41 ps.

KeywordCurrent Buffer (Cb) Digital Low Drop-out Regulator Enhanced Analog Assisted (E-aa) Power Management Switch Compensated Register (Scr)
DOI10.1109/ICTA50426.2020.9332011
URLView the original
Language英語English
Scopus ID2-s2.0-85100977702
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Document TypeConference paper
CollectionINSTITUTE OF MICROELECTRONICS
Affiliation1.South China University of Technology, School of Microelectronics, Guangzhou, China
2.University of Macau, State Key Laboratory of Analog and Mixed-Signal Vlsi, Macao
Recommended Citation
GB/T 7714
Chen, Ruipeng,Zhou, Shaolin,Wu, Zhaohui,et al. A Fast Response Digital Low-Dropout Regulator Based on Enhanced Analog Assisted Loop[C],2021:55-56.
APA Chen, Ruipeng,Zhou, Shaolin,Wu, Zhaohui,Li, Bin,&Huang, Mo.(2021).A Fast Response Digital Low-Dropout Regulator Based on Enhanced Analog Assisted Loop.Proceedings of 2020 IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2020,55-56.
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