TPSM53602: PGOOD noise

user6004480

Part Number: TPSM53602

Is it possible that noise inside TPSM53602 appears on signal from PGOOD pin?

Please refer to attached file.
We captured waveform of signal from PGOOD pin, and it is seems that there is impulse noise.
TPSM53602 PGOOD noise.pdf

over 1 year ago

+1 Andrew Kutzler over 1 year ago

TI__Genius 13180 points

Hi,

I don't think it's possible as the waveform isn't tied to the switching frequency of the device. It might be coming from somewhere else (maybe the input power?).

I don't believe it should be an issue, and I don't think the issue will appear if you tie the PGOOD pin to a voltage source with a ~100kOhm resistor.

Thanks,

Andrew

+1 user6004480 over 1 year ago in reply to Andrew Kutzler

Intellectual 480 points

Hi Andrew,

Thank you for reply !

Power management

Power management forum

TPSM53602: PGOOD noise