Design of Ultra Low Dropout Voltage Boost Converter

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  • Author: Song Liu
In electronic systems powered by USB port, to compensate for the dropout voltage of USB wires, a boost converter is usually needed, to step up USB port voltage above 5V, such as 5.15V, 5.2V or 5.25V. Due to different load conditions and different power management schemes of host machines, USB port voltage can vary from 4.75V to 5.25V. Therefore, an ultra-low dropout voltage boost is needed. In this paper, the design of such a boost converter with 5.1V input and 5.15V output is discussed.
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