Hello,
I have gotten answer for unused PMbus pins(PMB_CLK, PMB_DATA and SMB_ALRT#) termination when PMbus is unused on the below post.
It seems to be OK that these pins are left open. But I have some additional questions.
https://e2e.ti.com/support/power_management/non-isolated_dcdc/f/196/p/711485/2622074
1)
As far as I measured, there seems to be no interenal pull-down or up on these pins.
Why is it OK to left open these pins?
2)
Because I’m afraid of a noise effect, I want to add external termination.
What kind of termination is the best way? Is external Pull-up the best?
Regards,
Oba