Title :
A Capacitive Step-Down Converter Using a Linear Mode Pre-Regulator for Improved Load Regulation
Author :
Bin, Shao ; Yujia, Yang ; Zhiliang, Hong ; Chihao, Xu ; Killat, Dirk
Author_Institution :
State Key-Lab. of ASIC & Syst., Fudan Univ., Shanghai
Abstract :
A capacitive step-down converter in 0.25 mum CMOS using a linear mode pre-regulator is presented. The linear pre-regulator operates both in pulse frequency mode under low load conditions and in current mode under high output load. In pulse frequency mode the pre-regulator limits the charge current of the capacitor network improving the electromagnetic compatibility. Under high load conditions the converter operates in a current mode which means that the switched capacitors are clocked with a fixed duty cycle ratio and the regulation of the output voltage is performed by the pre-regulator
Keywords :
CMOS integrated circuits; DC-AC power convertors; current-mode circuits; switched capacitor networks; 0.25 micron; CMOS integrated circuits; capacitive step-down converter; capacitor network; charge current; duty cycle ratio; electromagnetic compatibility; linear mode pre-regulator; load regulation; pulse frequency mode; switched capacitors; Application specific integrated circuits; Charge pumps; Circuit testing; Costs; Electromagnetic compatibility; Frequency; Switched capacitor networks; Switches; Virtual colonoscopy; Voltage;
Conference_Titel :
Solid-State and Integrated Circuit Technology, 2006. ICSICT '06. 8th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0160-7
Electronic_ISBN :
1-4244-0161-5
DOI :
10.1109/ICSICT.2006.306401
