Hi, TI Support Team
Regarding the PGTH pin of the TPS25940-Q1, if it is not used as shown below, it should be connected to the OUT pin or GND.
In the VCU, it is connected to the OUT pin using a 100K resistor. (R5=DNI, R4=100K in the circuit diagram below)
Please inquire if there is a standard value when connecting to the OUT pin.