Bravotek Electronics Co., Ltd.

Yi-Cheng Hsu

Wei-Hsin Wei

Wei-Lun Hsieh

Architecture and design techniques for a single inductor multiple-output (SIMO) DC-DC converter are presented. The SIMO DC-DC converter is based on ordered-power-distributive-control (OPDC) scheme with several novel control mechanism to optimize the performance of the power delivery capability, conversion efficiency and voltage ripple. In addition to buck mode outputs, the new SIMO DC-DC converter can also have an output channel operating at auto-buck-boost mode for the input voltage varying with the usage time.

Single-inductor multiple-output DC-DC converter

A single inductor multiple-output DC-DC converter includes an inductor coupled to a first input switch and a second input switch to store energy from supply source, wherein the first input switch is coupled to an input supply node, and the second input switch is coupled to ground, the first and the second switches controlling current through the inductor; a plurality of output switches, each output switch coupled to a common inductor node and to a corresponding output supply node, each of the output supply node having a voltage converted from an input voltage received at an input supply node; a freewheel switch coupled between the common inductor node and ground; a control circuit receiving a sensed inductor current and a plurality of feedback signals indicating error signals between output voltages and their corresponding reference voltages, the control circuit being configured to control timing and charging current of the inductor.

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Hsinchu County, Taiwan

Yi-Cheng Hsu