Proportional Compensated Buck Converter With a Differential-In Differential-Out (DIDO) Error Amplifier and Load Regulation Enhancement (LRE) Mechanism

Author

Lee, Yu-Huei ; Chu, Kuan-Yu ; Shih, Chun-Jen ; Chen, Ke-Horng

Author_Institution

Inst. of Electr. Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

27

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

2426

Lastpage

2436

Abstract

A differential-in differential-out error amplifier and a load regulation enhancement mechanism are proposed in the buck converter that aims to improve load regulation and noise immunity. By using the proportional compensator in the proposed converter, there is no need of external compensation components in this design. As a result, a compact-size and high-performance dc-dc buck converter can be guaranteed. Experimental results show that load regulation can be improved from 0.5 to 0.025 mV/mA. The test chip was fabricated by 0.25 μm CMOS process and occupied 1.65 mm active silicon area.

Keywords

CMOS analogue integrated circuits; DC-DC power convertors; differential amplifiers; CMOS process; DIDO error amplifier; LRE mechanism; active silicon area; differential-in differential-out error amplifier; high-performance DC-DC buck converter; load regulation enhancement mechanism; noise immunity; proportional compensated buck converter; proportional compensator; size 0.25 mum; size 1.65 mm; Capacitors; Noise; Resistors; Sensors; System-on-a-chip; Transient response; Voltage control; Current-mode operation; dc–dc converter; differential-in differential-out (DIDO) amplifier; load regulation; system compensation;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2011.2173701

Filename

6061965