Part Number:TPS2054B
We are having a very baffling issue with this USB Pwr switch. The design has been working for almost a year. On a recent PCBA build, the part doesn't supply power to "OUT3". Even if we lift the OUT3 pin into the air, it still hovers near ground. It also reports OverCurrent (OC3#) when there's clearly no current. To rule out effects of the hub disabling the switch ports, we disconnected those and installed pullup resistors to force the enables on. Although OUT1 is supplying power, the corresponding OC1 pin is asserted, which doesn't make sense (there are no USB devices attached during testing).
Strangely, our TPS2065 also shows weird behavior on a 5th USB port. With no USB load attached, the device reports over-current with nothing attached. We have replaced the device (U52 below) with a part from a different batch (new part from Digikey), looked at our Gerbers/ODB for any potential artwork changes (none found).
This behavior of reporting overcurrent, in itself, is not a show-stopper, and we may have always had this (we don't do anything with those signals), but the lack of USB power available on pin 11 is a serious problem.
Any thoughts?