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Fast-transient DC-DC converter using a high-performance error amplifier with a rapid output-voltage control technique

Title
Fast-transient DC-DC converter using a high-performance error amplifier with a rapid output-voltage control technique
Author
노정진
Keywords
DC-DC converter; buck converter; fast transient response; high slew rate
Issue Date
2017-10
Publisher
WILEY-BLACKWELL
Citation
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, v. 45, No. 10, Page. 1431-1438
Abstract
This letter presents a method for improving the transient response of DC-DC converters. The proposed technique replaces the conventional error amplifier with a combination of two different amplifiers to achieve a high loop gain and high slew rate. In addition, a rapid output-voltage control circuit is employed to further reduce the recovery time. The proposed technique was applied to a four-phase buck converter, and the chip was implemented using a 0.18-mu m CMOS process. The switching frequency of each phase was set at 2 MHz. Using a supply voltage of 2.7-5.5 V and an output voltage of 0.6-1.5 V, the regulator provided up to 2-A load current with maximum measured recovery time of only 6.2 and 6.5 mu s for increasing and decreasing load current, respectively. Copyright (C) 2017 John Wiley Sons, Ltd.
URI
https://onlinelibrary.wiley.com/doi/abs/10.1002/cta.2329http://repository.hanyang.ac.kr/handle/20.500.11754/103695
ISSN
0098-9886; 1097-007X
DOI
10.1002/cta.2329
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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