A SEPIC (single ended primary inductor converter) is a DC-DC converter which allows the output voltage to be greater than, less than, or equal to the input voltage. The output voltage of the SEPIC is controlled by the duty cycle of the control transistor. Here is a USB to 5V SEPIC DC/DC Converter with Short-Circuit Protection.This circuit is ideal for applications where the output must reduce to zero during shutdown. The input current limit not only helps soft-start the output but also provides short-circuit protection, ensuring USB device compliance even under output fault conditions.
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