DocumentCode :
63483
Title :
Pseudo-Type-III Compensation Integrated in a Voltage-Mode Buck Regulator
Author :
Bing Yuan ; Xin-Quan Lai ; Hong-Yi Wang ; Qiang Ye
Author_Institution :
Inst. of Electron. Comput.-Aided Design, Xidian Univ., Xi´an, China
Volume :
61
Issue :
12
fYear :
2014
fDate :
Dec. 2014
Firstpage :
997
Lastpage :
1001
Abstract :
A pseudo-type-III compensation circuit integrated in a 2.25-MHz voltage-mode dc-dc buck regulator is presented. By summing high- and low-frequency signal paths at the outputs of an error amplifier, two zeros are generated to counteract the pair of complex LC poles. Comparing with traditional and various reported type-III compensation, the proposed scheme is compact, and the area of the compensation capacitor is reduced by about 37%. The addition of a high-frequency path also helps to improve the transient response. Experimental results show that the fabricated regulator with the proposed scheme achieves good stability and fast load-step response. The output is settled within 10 μs for a load current step of 400 mA. In addition, the measured load regulation and line regulation is 0.2%/A and 0.2%/V, respectively. The current consumption of the compensator is 120 μA and the measured maximum efficiency is up to 96%.
Keywords :
DC-DC power convertors; transient response; voltage control; compensation capacitor; error amplifier; pseudo-type-III compensation circuit; voltage-mode buck regulator; voltage-mode dc-dc buck regulator; Capacitors; Circuit stability; Current measurement; Poles and zeros; Regulators; Transient response; Voltage control; Compact area; loop stability; transient response; type-III compensation; voltage-mode buck regulator;
fLanguage :
English
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-7747
Type :
jour
DOI :
10.1109/TCSII.2014.2356915
Filename :
6895124
Link To Document :
بازگشت