6 Replies Latest reply on Nov 30, 2015 8:54 AM by user_385543602

    Hot swapping power kills PSOC 4 w/ LDO

    user_385543602

      Hi,

         

      I am having an issue with a PSOC 4 product that has a terminal block for power and communication on a custom board.  When I hot swap the terminal block, it kills the microcontroller, I cannot even program it again.  When I power cycle using the power button on a power supply, it does not affect it.  The power input is 12V, which goes to a MIC2920 5V LDO, then to the controller.   There is not much more to the circuit besides a reverse voltage protection diode.

         

      Any ideas?

         

      Thank you,
      Tom