A voltage-mode DC-DC converter with enhanced transient responses

This paper presents the design technique using a charge-pump circuit for enhancing the transient responses of a voltage-mode DC-DC converter. Although there is no need for additional sensing circuitry for a voltage-mode DC-DC converter, extensive frequency compensation scheme should be critical for...

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Bibliographic Details
Published in2012 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 974 - 977
Main Authors Kichang Jang, Jungsoo Choi, Chulkyu Park, Joongho Choi
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2012
Subjects
Charge pumps
CMOS integrated circuits
Hardware
Pulse width modulation
Transfer functions
Transient analysis
Voltage measurement
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Summary:This paper presents the design technique using a charge-pump circuit for enhancing the transient responses of a voltage-mode DC-DC converter. Although there is no need for additional sensing circuitry for a voltage-mode DC-DC converter, extensive frequency compensation scheme should be critical for stable operations. This converter shows slow transient responses with respect to variations of input voltage and load current. In this paper, a charge-pump circuit is added to the compensating circuit for faster responses. The proposed method is verified in hardware implementation where the voltage-mode DC-DC buck converter is fabricated in a 0.35-um CMOS technology.
ISBN:9781467302180
146730218X
ISSN:0271-4302
2158-1525
DOI:10.1109/ISCAS.2012.6272209