The Novel Switched-Capacitor DC-DC Converter for Fast Response Time and Reduced Ripple

Abstract

A novel voltage regulation scheme to control the number of multi-phase and frequency for Switched-Capacitor(SC) DC-DC converters is presented. The controller adjusts the number of interleaved phases with the size of switches. In addition, switching frequency of SC DC-DC converter is increased to reduce output ripple voltage when output load current is low. 16phase 2:1 SC DC-DC converter is designed in 45nm standard CMOS process using the proposed scheme. The converter with new control technique achieves fast response and low Vout ripple under fast varying currents. Maximum output voltage ripple(Vripple) is less than 15mV and maximum response time is less than 0.2us with 4mA. Normal Vripple is less than 2mV.

Meeting Name

IEEE 54th International Midwest Symposium on Circuits and Systems: MWSCAS (2011: Aug. 7-10, Seoul, South Korea)

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Control Techniques; Fast Response; Fast Response Time; Maximum Output; Maximum Response Time; Output Load; Ripple Voltage; SC DC-DC Converters; Standard CMOS Process; Switched Capacitor; Switched-Capacitor DC-DC Converter; Voltage Regulation Scheme; Capacitors; CMOS Integrated Circuits; Frequency Converter Circuits; HVDC Power Transmission; Response Time (Computer Systems); Voltage Regulators; DC-DC Converters

International Standard Book Number (ISBN)

978-1612848570; 978-1612848563

International Standard Serial Number (ISSN)

1548-3746; 1558-3899

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Aug 2011

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