A fast-transient low-dropout regulator with current-feedback-buffer (CFB) for SoC application

Author

Wang, Jia-Hui ; Yang, Chun-Hung ; Tsai, Chien-Hung

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

fYear

2010

Firstpage

170

Lastpage

173

Abstract

The design of a low-voltage fast-transient low-dropout regulator (LDR) with a current feedback buffer (CFB) for system-on-ship (SoC) applications is presented. When the CFB senses variation in the load current, it quickly controls the power transistor to achieve fast-transient and small output voltage variation. The proposed LDR has high current efficiency because the CFB can adjust the quiescent current at various load currents. A 1 V capacitor-less LDR with a 1.2 V power supply was fabricated in 0.35 μm CMOS technology. The CFB improves the current efficiency from 66.5% to 99% in light load.

Keywords

CMOS integrated circuits; feedback amplifiers; power supplies to apparatus; power transistors; system-on-chip; voltage regulators; SoC application; capacitorless LDR; current-feedback-buffer; fast-transient low-dropout regulator; power transistor; size 0.35 mum; system-on-ship applications; voltage 1 V; voltage 1.2 V; CMOS integrated circuits; CMOS technology; Large scale integration; RNA; LDR; current feedback buffer (CFB); quiescent current;

fLanguage

English

Publisher

ieee

Conference_Titel

Next-Generation Electronics (ISNE), 2010 International Symposium on

Conference_Location

Kaohsiung

Print_ISBN

978-1-4244-6693-1

Type

conf

DOI

10.1109/ISNE.2010.5669170

Filename

5669170