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

fYear

2006

fDate

2006

Firstpage

1708

Lastpage

1710

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICSICT.2006.306401

Filename

4098518