My customer has some questions about BUS voltage when IN and EN are off and BUS is driven at 5V.
This scenario is like, connecting a Type A mobile battery to TPS25831-Q1 through Type-A to Type-C cable.
At the above scenario, my customer is observing ~5V at IN. Could it be a problem or allowed from USB spec point of view?
In the first place, does the USB spec allow connecting a source only USB charger to a source only mobile battery port?