Title :
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
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;
Conference_Titel :
Circuits and Systems (MWSCAS), 2011 IEEE 54th International Midwest Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-61284-856-3
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2011.6026608
