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Original question:

LMZ30606: What could cause a short circuit?

LMZ30606: Using INH/UVLO with PGOOD ?

ROI DADUSH
Prodigy 20 points
Part Number: LMZ30606

Hello,

I'm using the TPS7A8701 connected to LMZ30606.

I wish to connect the PGOOD of the TPS7A8701 to the LMZ30606.

Is it possible to connect it to the INH/UVLO pin ?

Should we use any pull up resistor on this pin ?

Can you please advise how to daisy chain the PGOOD between the two devices ?

 Regards,

  • 0
    TI__Guru 50120 points

    Hi Roi,

    Do not place an external pullup resistor on the INH pin of the LMZ30606. The INH pin already has an internal pull-up current source such that when float floating the INH pin will enable the device. It is recommended to use the circuit shown in Figure 22 to control the INH/UVLO pin of the LMZ30606. In your case, you would also need an inverting circuit before the logic gate such that when PG of the TPS7A8701 is HIGH the INH/UVLO should be left floating.  

    Regards,

    Jimmy