A new active compensator scheme for dynamic voltage scaling in voltage regulators

Author

Qiu, Weihong ; Xiao, Shangyang ; Miller, Greg

Author_Institution

Intersil Corp., Milpitas, CA

fYear

2008

fDate

24-28 Feb. 2008

Firstpage

838

Lastpage

843

Abstract

Dynamic voltage scaling (DVS) techniques are used to optimize the power consumption of the microprocessor by reducing the operating voltage under light-load conditions. To maximize the power saving of DVS, the voltage regulator should adjust the operating voltage to the new voltage commanded by the system as soon as possible. However the voltage regulator output capacitors and the compensation network may impact the voltage transitioning and settling time during DVS operation. In this paper, these impacts are discussed in detail and an active compensator scheme is proposed to optimize the DVS performance. Experimental results are included to illustrate the effectiveness of the proposed scheme.

Keywords

capacitors; voltage regulators; active compensator scheme; dynamic voltage scaling; light-load conditions; power consumption; voltage regulator output capacitors; voltage transitioning; Capacitors; Clocks; Dynamic voltage scaling; Energy consumption; Frequency; Microprocessors; Regulators; Surges; Transient response; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2008. APEC 2008. Twenty-Third Annual IEEE

Conference_Location

Austin, TX

ISSN

1048-2334

Print_ISBN

978-1-4244-1873-2

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2008.4522818

Filename

4522818