An Output Capacitor-Less Low-Dropout Regulator with 0–100 mA Wide Load Current Range

Jihoon Park, Woong-Joon Ko, Dong-Seok Kang, Yoonmyung Lee and Jung-Hoon Chun
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Jihoon Park: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Woong-Joon Ko: Samsung Electronics Co. Ltd., Hwaseong 18448, Korea
Dong-Seok Kang: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Yoonmyung Lee: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea
Jung-Hoon Chun: College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea

Energies, 2019, vol. 12, issue 2, 1-13

Abstract: An output capacitor-less low-dropout (OCL-LDO) regulator with a wide range of load currents is proposed in this study. The structure of the proposed regulator is based on the flipped-voltage-follower LDO regulator. The feedback loop of the proposed regulator consists of two stages. The second stage is turned on or off depending on the variation in the output load current. Hence, the regulator can retain a phase margin at a wide range of load currents. The proposed regulator exhibits a better regulation performance compared to the ones in previous studies. The test chip is fabricated using a 65-nm CMOS process.

Keywords: low-dropout regulator; flipped voltage follower; wide load current range; output capacitor-less low-dropout regulator (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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