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A 96.5% Efficiency Current Mode Hysteretic Buck Converter With 1.2% Error Auto-Selectable Frequency Locking.

Authors :
Seo, Jeong-Il
Lim, Baek-Min
Lee, Sang-Gug
Source :
IEEE Transactions on Power Electronics; Sep2018, Vol. 33 Issue 9, p7733-7743, 11p
Publication Year :
2018

Abstract

This paper proposes a current mode hysteretic buck converter with auto-selectable frequency locking. In this work, the hysteresis of the hysteretic comparator and the resistance of the feedback network are adjusted simultaneously to fix the switching frequency. The proposed switching frequency locking scheme can improve the power efficiency and fix the spectral components of the output at specific frequencies by suitably lowering the switching frequency under light load conditions. Implemented in a 65 nm complementary metal oxide semiconductor (CMOS), the proposed converter achieves peak efficiency of 96.5% for a 3.3 V input with less than 1.2% frequency error while locking at 1, 0.5, and 0.25 MHz. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
08858993
Volume :
33
Issue :
9
Database :
Complementary Index
Journal :
IEEE Transactions on Power Electronics
Publication Type :
Academic Journal
Accession number :
130457462
Full Text :
https://doi.org/10.1109/TPEL.2017.2766691