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TPS82130: EN-pin issue when EN is driven from the gpio in High Z mode of a microcontroller

Part Number: TPS82130

Our customer inquired the following issue,

"I am using the TPS82130SILT with a micro-controller gpio line connected to the EN pin.  I noticed that when the micro-controller is in reset or when the gpio pin is in High Z mode the module appears to be in the ON state.  I want to use the micro-controller to turn on/off the TPS82130SILT.  The part shows a 400K pull down resistor internally, so I did not have any pull down external, hence the line floats until push pull configuration of the micro-controller pin is configured."