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Questions about couple pins on TPS54620 DC/DC switcher

Ming Chun Paul Lee
Prodigy 130 points
Other Parts Discussed in Thread: TPS54620

Hi, 

I am trying to include TPS54620 into my design, however, I still want to clear out some definition from the datasheet.

- PWRGD: Is this pin just a signal coming from the device indicating if there're any fault happening?  If we dont care about this, could we just leave it open?

- EN: For enable this device, is the threshold 1.2V?  If I want to control this with a 3.3V microcontroller, is it ok to do it?

Thanks

Paul