AOT-controlled dual-mode AVP buck regulator with AEAF mechanism

Hsin Lun Li, Chia Cheng Pao, Bo Ming Chen, Chien Hung Tsai

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

3 Citations (Scopus)

Abstract

A novel adaptive voltage positioning (AVP) buck regulator using adaptive on-time (AOT) control targeted for applications with low-ESR output capacitors is proposed. In this work, AOT control is adapted to keep the system's switching frequency quasi-fixed or independent of the input supply voltage and the AVP mechanism is realized without the need to use conventional error amplifier compensator or extra current-sensing circuit. For ensuring the system's switching frequency not entering the range of acoustic frequency at light load, an AEAF (avoid entering acoustic frequency) circuit is also proposed. For comparison purpose, the implemented buck regulator can be set to operate under AVP or non-AVP mode. This work has been fabricated and verified with a standard 0.18μm CMOS technology. Experimental results show excellent transient recovery time of 4μs (under AVP mode), ±0.11% switching frequency variation (for the specified input voltage range), and 91% peak conversion efficiency.

Original languageEnglish
Title of host publicationProceedings of the IEEE 2013 Custom Integrated Circuits Conference, CICC 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781467361460
DOIs
Publication statusPublished - 2013 Nov 7
Event35th Annual Custom Integrated Circuits Conference - The Showcase for Circuit Design in the Heart of Silicon Valley, CICC 2013 - San Jose, CA, United States
Duration: 2013 Sep 222013 Sep 25

Publication series

NameProceedings of the Custom Integrated Circuits Conference
ISSN (Print)0886-5930

Other

Other35th Annual Custom Integrated Circuits Conference - The Showcase for Circuit Design in the Heart of Silicon Valley, CICC 2013
CountryUnited States
CitySan Jose, CA
Period13-09-2213-09-25

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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  • Cite this

    Li, H. L., Pao, C. C., Chen, B. M., & Tsai, C. H. (2013). AOT-controlled dual-mode AVP buck regulator with AEAF mechanism. In Proceedings of the IEEE 2013 Custom Integrated Circuits Conference, CICC 2013 [6658538] (Proceedings of the Custom Integrated Circuits Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC.2013.6658538