Soft-Start Circuit Based on Switched-Capacitor for DC-DC Switching Regulator

Zhenpeng BIAN; Ruohe YAO; Fei LUO

doi:10.1587/transele.E95.C.1692

IEICE Transactions on Electronics

Online ISSN : 1745-1353
Print ISSN : 0916-8524

Regular Section

Soft-Start Circuit Based on Switched-Capacitor for DC-DC Switching Regulator

Zhenpeng BIAN, Ruohe YAO, Fei LUO

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Keywords: soft-start, DC-DC switching regulator, switched-capacitor, inrush current, overshoot voltage

JOURNAL RESTRICTED ACCESS

2012 Volume E95.C Issue 10 Pages 1692-1694

DOI https://doi.org/10.1587/transele.E95.C.1692

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Abstract

An on-chip soft-start circuit based on a switched-capacitor for DC-DC switching regulator is presented. A ramp-voltage, which is generated by a switched-capacitor, is used to make pulse width slowly increase from zero, in order to eliminate the inrush current and the overshoot voltage during start-up. The post simulation results show that the regulator soft starts well with the proposed soft-start circuit.

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