The Novel Switched-Capacitor DC-DC Converter for Fast Response Time and Reduced Ripple
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.
I. Jung et al., "The Novel Switched-Capacitor DC-DC Converter for Fast Response Time and Reduced Ripple," Proceedings of the IEEE 54th International Midwest Symposium on Circuits and Systems (2011, Seoul, South Korea), Institute of Electrical and Electronics Engineers (IEEE), Aug 2011.
The definitive version is available at https://doi.org/10.1109/MWSCAS.2011.6026608
IEEE 54th International Midwest Symposium on Circuits and Systems: MWSCAS (2011: Aug. 7-10, Seoul, South Korea)
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
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