LM25145: Is there harm to controller if output is powered by another source when controller is disabled?

DHaas59

Part Number: LM25145

Tool/software:

I would like to disable the buck controller when voltage drops to a certain level and bypass the buck regulator by connecting the input voltage to the buck regulator output. Will this cause any harm to the controller?

6 months ago

0 Andrew Kutzler 6 months ago

TI__Mastermind 23795 points

Hi DHaas,

Seems to be ok as long as you don't violate the abs max's for this device.

Some devices list values like VIN-0.3V, in this table, however it looks like the device does not.

Thanks,
Andrew

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LM25145: Is there harm to controller if output is powered by another source when controller is disabled?