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TPS62826: Behavior when Vout>=Vin when EN Low

Part Number: TPS62826

Tool/software:

Lets say input to converter TPS62826 is 3.7V and we have a higher source that we want to pass to the output. Of course normally switching between 2 supplies is accomplished by power mux or (ideal) diode ORing. 

But for reduce bom lines, maybe we want to avoid this and connect the 5V directly to VOUT via an idealized bidrectional switch. 

If we pull EN Low during this time, is there any risk to the device? The only risk i see is forward biasing internal NMOS body diode, which will allow current to flow from VIN to IN problematic for the system we can avoid with a series diode on VIN. 



are there any other considerations i am missing?





  • Hello Dimitri,

    thanks for reaching out in E2E.

    Your understanding is correct.

    But this configuration is violating the specified Absolute Maximum Ratings of the TPS62826 device.

    In case of quality issues, TI may most likely not accept a return if a part is operated outside the recommended ranges.

    Best regards,

    Andreas.