Murata Manufacturing Co., Ltd.

Psemi Corporation

Xiaowu Sun

Gregory Szczeszynski

Antony Christopher Routledge

Satish Kumar Vangara

Circuits and methods that limit current through power FETs of power converter to reduce damaging current in-rush events, independent of switching frequency, device mismatches, and PVT variations. Embodiments utilize a closed-loop feedback circuit and/or a calibrated compensation circuit to regulate, substantially independent of frequency, the control voltage Vapplied to a power FET gate. In a reduced gate-drive mode, connecting a feedback or compensation circuit to the gate of an LDO source-follower FET allows the gate voltage to be regulated to control the LDO output voltage to a final inverter coupled to the gate of a power FET so that Vis adjusted to provide a reduced gate-drive to the power FET; connecting to the output of the LDO allows the LDO output voltage to the final inverter to be directly regulated to adjust V; connecting to the gate of the power FET allows Vto be directly set.

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Milford, NH, United States of America

Xiaowu Sun