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TPS2051C: TPS2051CDBVR Doesn't turn on.

Part Number: TPS2051C

I am working on a new design, using this IC for the first time.  I have double checked the data sheet pinout vs the PCB.

GND and power are connected.  I can either drive the EN pin high / low, or let the USB hub IC drive it - in no case does the output pin turn on. The output  load is not shorted.  If I bypass this switch with a jumper, the loads power up.  The *fault* pin is high regardless of any other condition, so It doesn't' seem to be in shutdown / protect mode.  

According to the data sheet, the EN pin high should turn on the output, yet it does not.

I have 2 prototype PCBs built, and both are doing the same thing.


    Out  1      5 In

  GND  2

nFLTn  3      4   EN

The part is marked with VBYQ

What am I missing?