Design of a fast-transient current-mode buck DC-DC converter

Chia Chieh Wong, Hung Hsien Wu, Ming Hsien Shih, Chia Ling Wei

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

With the fast growing market of the portable devices, high performance power management ICs with fast transient responses have drawn many attentions, especially for the SoC system with dynamic voltage scaling technique. In this work, no extra transient detector is required to achieve fast transient, so it can avoid the errors caused by the transient detector and ensure the system stability. Instead, the proposed technique sends the output voltage variations to the inner current loop through the current sensing circuit, and then adjusts the level of the ramp waveform adaptively. The small-signal model of the proposed converter is presented, which shows that both of the bandwidth and phase margin of the converter are improved by using this technique. The input voltage is 5V and the output voltage is set to 3.3V. Simulation results show that the recovery time of the transient response can be reduced by 70%.

Original languageEnglish
Title of host publication1st International Future Energy Electronics Conference, IFEEC 2013
PublisherIEEE Computer Society
Pages767-771
Number of pages5
ISBN (Print)9781479900718
DOIs
Publication statusPublished - 2013
Event1st International Future Energy Electronics Conference, IFEEC 2013 - Tainan, Taiwan
Duration: 2013 Nov 32013 Nov 6

Publication series

Name1st International Future Energy Electronics Conference, IFEEC 2013

Other

Other1st International Future Energy Electronics Conference, IFEEC 2013
CountryTaiwan
CityTainan
Period13-11-0313-11-06

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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