A Fast Transient Flip Voltage Follower Based Low Dropout Regulator with AC-Coupled Pseudo Tri-Loop Technique Without Using Any Output Capacitor

2019 ◽  
Author(s):  
Tzu-Hao Chien ◽  
Ching-Jan Chen ◽  
Sheng-Teng Li ◽  
Chieh-Ju Tsai
Keyword(s):  
Voltage Follower ◽  
Loop Technique ◽  
Fast Transient ◽  
Low Dropout Regulator ◽  
Output Capacitor

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

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 211 ◽  
Author(s):  
Jihoon Park ◽  
Woong-Joon Ko ◽  
Dong-Seok Kang ◽  
Yoonmyung Lee ◽  
Jung-Hoon Chun
Keyword(s):  
Cmos Process ◽  
Load Current ◽  
Flipped Voltage Follower ◽  
Better Regulation ◽  
Wide Range ◽  
Voltage Follower ◽  
Low Dropout Regulator ◽  
Output Capacitor ◽  
Ldo Regulator ◽  
Two Stages

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.

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