A fast hysteretic buck converter with adaptive ripple controller

Author

Wey, Chin-Long ; Li, Ze-Yan ; Chang, Kun-Chun ; Sung, Gang-Neng ; Wey, Dennis K.

Author_Institution

Dept. of Electr. Eng., Nat. Central Univ., Jhongli, Taiwan

fYear

2012

fDate

5-8 Aug. 2012

Firstpage

1156

Lastpage

1159

Abstract

The paper presents the design of a fast voltage-mode hysteretic buck converter with adaptive ripple controller. The conventional hysteretic converters have the merit of fast response and yet stable operation. However, the output voltage ripple is always higher than the fixed window of the hysteretic comparator. The adaptive ripple controller is a circuit which automatically generates a virtual hysteresis window for the hysteretic comparator such that the output voltage ripples are stable within the fixed hysteresis window according to the load conditions. The hysteretic comparator with the adaptive ripple controller has been designed and implemented with the TSMC .35 CMOS process.

Keywords

CMOS integrated circuits; comparators (circuits); network synthesis; power convertors; CMOS process; TSMC; adaptive ripple controller; design; fast voltage-mode hysteretic buck converter; hysteretic comparator; Capacitors; Delay; Hysteresis; Regulators; Simulation; Switching frequency; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2012 IEEE 55th International Midwest Symposium on

Conference_Location

Boise, ID

ISSN

1548-3746

Print_ISBN

978-1-4673-2526-4

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2012.6292230

Filename

6292230