Power conversion circuit and control method thereof

Abstract

A power conversion circuit includes a high-side transistor, a low-side transistor, an inductor, a plurality of switches, and a control circuit. The high-side transistor provides a supply voltage to a switch node based on a high-side driving signal. The low-side transistor couples the switch node to the ground based on a low-side driving signal. the inductor is coupled to the switch node. An inductor current flows through the inductor, and the inductor current is continuous. The plurality of switch powers one of the output voltages with the inductor current based on the corresponding switch signal. the control circuit generates the high-side driving signal and the low-side driving signal based on the state of the output voltage that is powered.

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