標題: Fast-transient dc-dc converter with on-chip compensated error amplifier
作者: Chen, Ke-Horng
Huang, Hong-Wei
Kuo, Sy-Yen
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: current-mode dc-dc converter;fast-transient response;on-chip compensation
公開日期: 1-Dec-2007
摘要: A fast-transient dc-dc converter with on-chip compensated error amplifier is presented in this paper. The error amplifier uses three transistors and one voltage follower to implement the on-chip current-mode Miller capacitor. Not only on-chip compensated error amplifier is implemented without off-chip components and I/O pins, but also fast-transient response Is achieved. Moreover, we accurately decrease the transient response time without suffering from the oscillation issue. Implemented in a 0.35-mu m CMOS process, experimental results demonstrate the stability of converters with a little area overhead about 5% larger than that of conventional design. In case of load variations, there is about four times reduction on the dropout voltage compared to that of conventional design. Furthermore, transient speed by our proposed technique is about five times faster than that of conventional control, while the total quiescent current is only increased about 3%.
URI: http://dx.doi.org/10.1109/TCSII.2007.905884
http://hdl.handle.net/11536/10037
ISSN: 1549-7747
DOI: 10.1109/TCSII.2007.905884
期刊: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
Volume: 54
Issue: 12
起始頁: 1150
結束頁: 1154
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