학술논문
Unsymmetrical parallel switched-capacitor (UP-SC) regulator with fast searching optimum ratio technique
Document Type
Conference
Author
Source
ESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference. :287-290 Sep, 2017
Subject
Language
Abstract
Different from conventional multiphase switched-capacitor (SC) DC-DC converters, the proposed unsymmetrical parallel switched-capacitor (UP-SC) regulator provides more controllable input variables to increase available conversion ratios for improved load regulation. Even under higher conversion ratio numbers, the UP-SC regulator uses the fast searching optimum ratio (FSOR) technique to search the destined ratio rapidly and to reduce the transient recovery time. Experimental results show the test chip fabricated in 0.25μm CMOS process increases the ratio number to 187 and 2389 in 3-stage and 4-stage SC regulators, respectively. Transient recovery time reduces from 26μ8 to 1.5μ8 in case of 7mA load current step.