Fast-transient DC-DC converter using a high-performance error amplifier with a rapid output-voltage control technique
- Authors
- Javed, Khurram; Yeo, Jaejin; Lee, Jaeseong; Roh, Jeongjin
- Issue Date
- Oct-2017
- Publisher
- WILEY
- Keywords
- DC-DC converter; buck converter; fast transient response; high slew rate
- Citation
- INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, v.45, no.10, pp.1431 - 1438
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
- Volume
- 45
- Number
- 10
- Start Page
- 1431
- End Page
- 1438
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/8946
- DOI
- 10.1002/cta.2329
- ISSN
- 0098-9886
- 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.
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