A Low Dropout regulator using current buffer compensation technique

Author

Lin, Yeong-Tsair ; Wu, Chi-Cheng ; Jen, Mei-Chu ; Wu, Dong-Shiuh ; Wu, Zhe-Wei

Author_Institution

Dept. of Electron. Eng., Lunghwa Univ. of Sci. & Technol., Taoyuan, Taiwan

fYear

2010

Firstpage

144

Lastpage

146

Abstract

A current buffer compensation Low Dropout (LDO) regulator for portable applications is present in this paper. The current buffer compensation scheme is a current feedback amplifier, which provides low output impendence in order to move the non-dominant pole due to the large gate capacitance of the pass transistor of the LDO regulator to high frequency. This LDO circuit had been designed and implemented in a 0.35-μm CMOS processes, it occupied a chip area of 810×572 μm². The measurement results show that this circuit functions properly with supply voltage of 2.2~3.3 V and provides maximum current of 200 mA. The output voltage can be adjusted from 0.6 V to 3.1 V when the supply voltage is 3.3 V.

Keywords

buffer circuits; voltage regulators; CMOS process; circuit function; current buffer compensation; current feedback amplifier; gate capacitance; low dropout regulator; non-dominant pole; pass transistor; portable application; size 0.35 mum; supply voltage; voltage 0.6 V to 3.1 V; voltage 2.2 V to 3.3 V; Gain; Impedance; Integrated circuit modeling; Logic gates; Regulators; Transistors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-5797-7

Type

conf

DOI

10.1109/ICSICT.2010.5667821

Filename

5667821