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TPS736: TPS73601DBVR - Any Errata

John Westmoreland
Prodigy 95 points
Part Number: TPS736

Hello TI,

We're using this P/N in a new board design - TPS73601DBVR - is there any errata against this P/N?

We're seeing the output voltage to be 1/2 of what it should be - of course there could be excessive loading - but I just wanted to ask regarding errata just in case.

I used this in a previous dev board design - same circuit - worked fine.

Thanks In Advance,
John W.

  • 0
    TI__Mastermind 38195 points

    Hi John,

    I wasn't able to find any. Can you share more details of your circuit so we can try figuring out what's going on? This sounds like something else is going on on the board. 

    Regards,

    Nick

  • 0 in reply to Nick Butts
    Prodigy 95 points

    Hello Nick,

    There's a schematic snippet of how we're using the part.  We have a previous dev board where this worked just fine - I think we may have a plane short issue and/or once power is applied - there may be something else driving the plane this is providing power too.

    I'm going to take the TPS73601DBVR off the PCBA and then take some measurements and use a bench supply with current limiting of course to see what's going on.  We could have a plane fault in these PCBA's - but I just wanted to check and see if there's any errata against this P/N.

    Also - here's a pic of the part that's installed - looks like the code is correct:

    Thanks!
    John W.

  • 0 in reply to John Westmoreland
    TI__Mastermind 38195 points

    Hi John,

    I don't see anything abnormal from the schematic. Was VBAT_IN what you expected when the output was incorrect? Was the device hot when the output was incorrect? If it was hitting current limit it would definitely be getting pretty hot. 

    When you measured the incorrect output voltage, was it with a DC meter or did you capture oscilloscope waveforms? I wonder if there was more going on than the equipment could show if you used a DC meter. 

    Regards,

    Nick