Rosenberg, Klein & Lee
Two-step ripple-free multi-phase buck converter and method thereof
A two-step ripple-free multi-phase buck converter and method thereof comprises a first-stage voltage regulator to convert an input voltage to an intermediate voltage and a second-stage voltage regulator with a phase number not less than two to further convert the intermediate voltage to an output voltage by a split phase control, in which the ratio of the intermediate voltage to the output voltage is intended to the phase number such that the steady state output current of the converter approaches to be ripple-free, and hence the drivers and MOSFETs for the second-stage voltage regulator are lower cost, the efficiency of the second-stage voltage regulator is improved, and a higher slew rate current is obtained for transient driving capabilities.
Richtek Technology Corp.
H H
H02M H02M
inventional additional
Shwu-Liang Hung-I Jing-Meng Liang-Pin
Hsieh Wang Liu Tai