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TPS709-Q1: Is TPS709-Q1 able to tolerate higher voltage applied on output indefinitely?

BrandonAzbell
Guru 63195 points
Part Number: TPS709-Q1

Off 12V battery application, where the TPS70950-Q1 is considered to provide low Iq supply for a CAN transceiver in a specific mode of operation of <100uA current draw from 12V battery (for whole product).

However, when not in this low Iq mode, the TPS709-Q1 is not the preferred path to supply power due to voltage transients, etc.  A diode will be used to carry the current load, but the common node between cathode of diode and output of TPS709-Q1 would be at 5.2V (200mV higher than set point of TPS709-Q1).

Is this a scenario that is tolerable indefinitely?  (ie. not transient but steady state)

  • 0
    TI__Mastermind 23361 points

    Hi Brandon, 

    From my understanding of your question, you were asking if TPS70950-Q1 can tolerate a voltage of 5.2V at its output during normal operation for an extended amount of time, correct? 

    If yes, the part should be okay as the following condition has been met: 

    The reverse current protection is always active regardless of the enable pin logic state or if the OUT pin voltage is greater than 1.8 V. 

    Regards, 
    Jason Song