The novel Switched-Capacitor DC-DC converter for fast response time and reduced ripple

Author

In-Seok Jung ; Yong-Bin Kim ; Minsu Choi

Author_Institution

Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA

fYear

2011

fDate

7-10 Aug. 2011

Firstpage

1

Lastpage

4

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. 16 phase 2:1 SC DC-DC converter is designed in 45 nm 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 15 mV and maximum response time is less than 0.2 us with 4 mA. Normal Vripple is less than 2 mV.

Keywords

CMOS integrated circuits; DC-DC power convertors; frequency control; switching convertors; voltage control; fast response time; frequency control; maximum output voltage ripple; multiphase control; output load current; ripple voltage reduction; size 45 nm; standard CMOS process; switched-capacitor DC-DC converter; voltage regulation scheme; DC-DC power converters; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on

Conference_Location

Seoul

ISSN

1548-3746

Print_ISBN

978-1-61284-856-3

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2011.6026608

Filename

6026608