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TPS735: The Vref and DC output accuracy of TPS735

Cao Cao
Intellectual 770 points
Part Number: TPS735

Hi Team,

Could you help us to confirm as below question? thanks.

  • 0
    TI__Guru 50190 points

    HI Cao Cao,

    Can you clarify your question? the 25C accuracy for both is still +/-1%. Here is from the latest revision January 2015:

    These revisions are an attempt to clarify the information. If we actually change any values in the Electrical Characteristics Table it is TI Policy to send out Change Notifications prior to implementing the change.

    I apologize if I am not understanding your question.

  • 0 in reply to JCHK
    Intellectual 770 points

    Hi John,

    thanks for your reply. below is my question.

    Cao Cao

  • 0 in reply to Cao Cao
    TI__Guru 50190 points

    HI Cao Cao,

    I understand your question. Yes. the TPS735 datasheet is only claiming its accuracy. Not the total accuracy including the feedback resistors. So worst case tolerance would be to simply add up the tolerances. So for the TPS735 this is 2% and for the two feedback resistors this would be 1% + 1% for a worst case of 4%.

    Some customer use the square root sum of the squares method which would be SQRT(2^2+1^2+1^2) ore SQRT(6) or 2.44%.

    If you go with a fixed output, then the tolerance would simply be 2%. Also please note that our accuracy specified is over the full input voltage range, Load current range, and operating temperature range:

    I hope this helps.

    Regards,