A fast hysteretic buck DC-DC converter with start-up overshoot suppression technique

The voltage-mode hysteretic converter is one of ripple-based regulators. The converter has the salient features of fast transient response, good conversion efficiency, and simple architecture. However, the major drawbacks include large voltage ripple caused by propagation delay path and excess overs...

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Bibliographic Details
Published in2012 Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics pp. 56 - 60
Main Authors Kun-Chun Chang, Chin-Long Wey
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2012
Subjects
Asia
Control systems
Microelectronics
MOSFETs
Simulation
Transient response
Voltage control
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Summary:The voltage-mode hysteretic converter is one of ripple-based regulators. The converter has the salient features of fast transient response, good conversion efficiency, and simple architecture. However, the major drawbacks include large voltage ripple caused by propagation delay path and excess overshoot voltage during the start-up period. This paper presents an overshoot suppression technique uses two-phase PMOS transistors to optimize the solution among the overshoot voltage, transistor size, and conversion efficiency. There exists a design trade-offs between start-up overshoot voltage and settling time. Results show that, with the proposed suppression technique, the overshoot voltage is reduced from 340mV to 74.4mV. However, the settling time is increased from 15.1us to 21.74 us.
ISBN:9781467350655
1467350656
ISSN:2159-2144
2159-2160
DOI:10.1109/PrimeAsia.2012.6458627