Title :
A Constant Frequency Output-Ripple-Voltage-Based Buck Converter Without Using Large ESR Capacitor
Author :
Mai, Yuan Yen ; Mok, Philip K T
Author_Institution :
Supertex Inc., Hong Kong
Abstract :
A constant frequency output-ripple-voltage based CMOS current-mode dc-dc buck converter, providing fast load transient response and reference-tracking speed, is proposed in this paper. Unlike V2 control output-ripple-voltage based buck converter, the proposed buck converter can achieve fast and stable load transient response without relying on ESR value of output capacitor. In addition, the proposed converter has faster reference-tracking speed than V2 the control counterparts by about 25 times.
Keywords :
CMOS integrated circuits; DC-DC power convertors; capacitors; transient response; CMOS current-mode dc-dc buck converter; constant frequency output-ripple-voltage-based buck converter; large ESR capacitor; output capacitor; reference-tracking speed; transient response; ${V}^{2}$ control; Buck converter; current-mode control; reference tracking;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2008.922474
