Title :
A Current-Mode DC-DC Buck Converter with High Stability Independent of Load and Supply Voltage
Author :
Chen, Dongpo ; HE, Lenian ; Yan, Xiaolang
Author_Institution :
Dept. of Electr. & Electron. Eng., Zhejiang Univ., Hangzhou
Abstract :
A current-mode DC-DC buck converter with high stability independent of load and supply voltage is presented. The loop gain´s expression of the current-mode converter is derived by employing an advanced model of current-mode control converter. After analyzing the loop gain´s expression, which illustrates the method of selecting suitable frequency compensation for control-loop, and a novel pole-zero tracking frequency compensation is proposed. Based on theoretic analysis, a DC-DC buck converter which has high stability independent of load and supply voltage is designed with 0.5 mum-CMOS technology. The simulated results revealed that stability of the converter is independent of load current and input voltage. Moreover, the converter provides a full load transient response of less than 5 mus setting time and less than 30 mV overshoots and undershoots
Keywords :
CMOS integrated circuits; DC-DC power convertors; compensation; electric current control; stability; transient response; CMOS technology; current-mode DC-DC buck converter; current-mode control converter; frequency compensation; full load transient response; input voltage; load current; load voltage; pole-zero tracking frequency compensation; supply voltage; Buck converters; Filters; Frequency; Helium; Personal digital assistants; Poles and zeros; Pulse amplifiers; Pulse width modulation; Stability analysis; Voltage;
Conference_Titel :
Industrial Electronics, 2006 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0496-7
Electronic_ISBN :
1-4244-0497-5
DOI :
10.1109/ISIE.2006.295773
