Title :
An adaptive segment output stage with dual-mode control in DC-DC converter
Author :
Jianluo Chen ; Yu Geng Ping Luo
Author_Institution :
State Key Lab. of Electron. Thin Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
An adaptive segment output stage with dual-mode control in DC-DC converter is proposed. According to the load current, optimizing width of the power MOSFET facilitates enhancing conversion efficiency. Specially, in order to improve the efficiency at very light load conditions, PSM controller is included in system which can switch dynamically based on the load current. A dual-mode buck DC-DC converter with the adaptive segment output stage is designed and simulated in a 0.13μm standard CMOS process. The simulation results show that the maximum efficiency improvement of the converter with adaptive segment reaches 5.3% at 15mA compared to converter without segment.
Keywords :
CMOS integrated circuits; DC-DC power convertors; MOSFET; load regulation; voltage control; PSM controller; adaptive segment output stage; current 15 mA; dc-dc converter; dual-mode buck DC-DC converter; dual-mode control; load current; power MOSFET; standard CMOS process; voltage regulation loop; voltage-mode control loop; CMOS process; MOSFET; Pulse width modulation; Simulation; Switches; Voltage control;
Conference_Titel :
Communications, Circuits and Systems (ICCCAS), 2013 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-3050-0
DOI :
10.1109/ICCCAS.2013.6765360
