Open AccessMultiphase voltage regulator with small output ripple in both CCM and DCM
Author(s) -
Zhang Shuyu,
Zhao Menglian,
Hu Rubo,
Wu Xiaobo
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2018.6738
Subject(s) - ripple , regulator , control theory (sociology) , voltage , voltage regulator , low dropout regulator , dropout voltage , engineering , computer science , electrical engineering , biochemistry , chemistry , control (management) , gene , artificial intelligence
A novel multiphase voltage regulator with small output ripple in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) is proposed. Mathematical analysis proves that the multiphase regulator has the smallest output ripple if phases are equally interleaved. The proposed regulator could minimise the output ripple through precisely interleaved phases by using a PLL‐based synchronous clock in CCM and a self‐adjusted staggered‐time generator in DCM. The design is validated by fabrication in 0.18 µm CMOS process. Test results show that the peak–peak values of output ripple are 6 and 9 mV with 4 and 0.3 A loads, respectively.