[1] Wang Yi, Cui Chuanrong, Gong Wenchao, He Lenian, et al. CMOS low-dropout regulator with 3.3 μA quiescent currentwithout off-chip capacitor [J]. Journal of Southeast University (English Edition), 2009, 25 (1): 13-17. [doi:10.3969/j.issn.1003-7985.2009.01.004]

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CMOS low-dropout regulator with 3.3 μA quiescent currentwithout off-chip capacitor()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

25

Issue:

2009 1

Page:

13-17

Research Field:

Circuit and System

Publishing date:

2009-03-30

Info

Title:

CMOS low-dropout regulator with 3.3 μA quiescent currentwithout off-chip capacitor

Author(s):

Wang Yi;  Cui Chuanrong;  Gong Wenchao;  He Lenian

Institute of VLSI Design, Zhejiang University, Hangzhou 310027, China

Keywords:

low-dropout regulator;  off-chip capacitor;  slew-rate enhancement circuit;  nested Miller compensation(NMC)

PACS:

TN401

DOI:

10.3969/j.issn.1003-7985.2009.01.004

Abstract:

A CMOS(complementary metal-oxide-semiconductor transistor)low-dropout regulator(LDO)with 3.3 V output voltage and 100 mA output current for system-on-chip applications to reduce board space and external pins is presented.By utilizing a dynamic slew-rate enhancement(SRE)circuit and nested Miller compensation(NMC)on the LDO structure, the proposed LDO provides high stability during line and load regulation without off-chip load capacitors.The overshot voltage is limited within 550 mV and the settling time is less than 50 μs when the load current decreases from 100 mA to 1 mA.By using a 30 nA reference current, the quiescent current is 3.3 μA.The proposed design is implemented by CSMC 0.5 μm mixed-signal process.The experimental results agree with the simulation results.

References:

[1] Leung Ka Nang, Mok Philip K T.A capacitor-free CMOS low-dropout regulator with damping-factor-control frequency compensation [J].IEEE Journal of Solid-State Circuits, 2003, 38(10):1692-1702.
[2] Wang Chua-Chin, Huang Chi-Chun, Lee Tzung-Je, et al.A linear LDO regulator with modified NMCF frequency compensation independent of off-chip capacitor and ESR circuits and system [C]//IEEE Asia Pacific Conference on Circuits and Systems.Singapore, 2006:880-883.
[3] Lam Yat-Hei, Ki Wing-Hung, Tsui Chi-Ying.Adaptively-biased capacitor-less CMOS low dropout regulator with direct current feedback [C]//Asia and South Pacific Conference on Design Automation.Yokohama, Japan, 2006:104-105.
[4] Chen Dongpo, He Lenian, Yan Xiaolang.Highly stable low-dropout linear regulator with temperature compensation [J].Journal of Zhejiang University:Engineering Science, 2007, 41(6):950-954.(in Chinese)
[5] Chen Dongpo, He Lenian, Yan Xiaolang.A low-dropout regulator with low quiescent current and high stability [J].Journal of Electronics and Information Technology, 2006, 28(8):1526-1529.(in Chinese)
[6] Wang Yi, He Lenian, Yan Xiaolang.30 nA temperature-independent CMOS current reference and its application in an LDO [J].Chinese Journal of Semiconductors, 2006, 27(9):1657-1662.(in Chinese)
[7] Leung Ka Nang, Mok Philip K T.Analysis of multistage amplifier-frequency compensation [J].IEEE Transactions on Circuits and Systems Ⅰ:Fundamental Theory and Applications, 2001, 48(9):1041-1056.
[8] Behzad Razavi.Design of analog CMOS integrated circuits [M].Xi’an:Xi’an Jiaotong University Press, 2003.

Memo

Memo:

Biographies: Wang Yi(1982—), male, graduate;He Lenian(corresponding author), male, doctor, professor, helenian@vlsi.zju.edu.cn.
Foundation item: The Key Science and Technology Project of Zhejiang Province(No.2007C21021).
Citation: Wang Yi, Cui Chuanrong, Gong Wenchao, et al.CMOS low-dropout regulator with 3.3 μA quiescent current without off-chip capacitor[J].Journal of Southeast University(English Edition), 2009, 25(1):13-17.

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