Hello All,
I have designed an output discharge circuit for a DC-DC buck converter with the following specifications: output voltage = 3.3 V, output current = 5 A, and output capacitance = 44 µF. The discharge circuit is implemented using an N-channel MOSFET connected between VSW and ground. To ensure a proper discharge path during the disabled state, the low-side switch is masked to keep it off.

However, I am encountering an issue where the output discharges through the load resistor rather than via the intended discharge path. This indicates that the output discharge circuit is not actively contributing to the discharge process.

If you have any suggestions or insights to help resolve this issue, I would greatly appreciate your input.
Best regards,

 

If you have any suggestions

A circuit diagram?

 

[ATTACH type="full" align="left" alt="A diagram of a circuit

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Certainly a circuit schematic of the actual application circuit will help us to understand the problem. BUT if the supply output voltage is pulled down by the load current, I am wondering why that is considered a problem.
It seems that there is more to the application than we have been told.