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TPS56637: Unused PG pin ternination

Part Number: TPS56637

Hi Expert,

My customer would like to confirm how unused power good(PG) pin of TPS56637 should be terminated. I think the PG is truely open drain output according to the datasheet. So, ether way, tied to GND or just leff open, should be fine. But may I have your recommendation for TPS56637?

Thanks for your help in advance.

Regards,
Ikoma