TY - JOUR
T1 - Efficiency optimization of a step-down switched capacitor converter for subthreshold
AU - Krihely, Natan
AU - Ben-Yaakov, Sam
AU - Fish, Alexander
PY - 2013
Y1 - 2013
N2 - In this brief, an efficient voltage scalable switched capacitor converter (SCC) for 1.1 V battery-powered digital system is presented. The SCC employs a binary resolution technique to preserve high efficiency at load voltages down to sub-200 mV while keeping the efficiency high. The proposed converter can be configured into four topologies to support subthreshold output levels of 0.18-0.6 V. The converter is designed in a standard lowpower 40-nm CMOS TSMC process. Simulation results show that the efficiency of the SCC can be improved by 10%-11% in the vicinity of VDD=200mV as compared to one using a conventional approach. An optimization strategy for designing multi-topology SCC is presented to improve the effectiveness of the circuit and to preserve efficiency over large load voltages.
AB - In this brief, an efficient voltage scalable switched capacitor converter (SCC) for 1.1 V battery-powered digital system is presented. The SCC employs a binary resolution technique to preserve high efficiency at load voltages down to sub-200 mV while keeping the efficiency high. The proposed converter can be configured into four topologies to support subthreshold output levels of 0.18-0.6 V. The converter is designed in a standard lowpower 40-nm CMOS TSMC process. Simulation results show that the efficiency of the SCC can be improved by 10%-11% in the vicinity of VDD=200mV as compared to one using a conventional approach. An optimization strategy for designing multi-topology SCC is presented to improve the effectiveness of the circuit and to preserve efficiency over large load voltages.
KW - Dc-dc power converter
KW - design optimization
KW - low-power electronics
KW - subthreshold design
KW - switched capacitor circuits
UR - http://www.scopus.com/inward/record.url?scp=84886727749&partnerID=8YFLogxK
U2 - 10.1109/TVLSI.2012.2231888
DO - 10.1109/TVLSI.2012.2231888
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AN - SCOPUS:84886727749
SN - 1063-8210
VL - 21
SP - 2353
EP - 2357
JO - IEEE Transactions on Very Large Scale Integration (VLSI) Systems
JF - IEEE Transactions on Very Large Scale Integration (VLSI) Systems
IS - 12
M1 - 6423300
ER -