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TPS7A3001-EP: Vref versus Vfb tolerances

Michael Koran
Prodigy 10 points
Part Number: TPS7A3001-EP

Tool/software:

The TPS7A3001-EP data sheet indicates the reference voltage is Minimum -1.22V, Nominal -1.184V and maximum -1.142V.  The graph in figure 2. shows VFB being near -1.175V at 25C.  There appears to be an offset between the Vref and VFB.  Can you clarify?

Does overall accuracy include the variation in Vref?  The reference appears to have a variation of 3%, but overall accuracy, with load regulation effects is +/- 2.85%

Thanks

  • 0
    TI__Genius 13440 points

    Hi Michael,

    I will refer to our test data and get back to you soon.

    Best regards

    Ishaan

  • +1 in reply to Ishaan Shetye
    TI__Genius 13440 points

    Hi Michael,

    When the EP (Extended Performance) part was characterized, it's lower temperature bound was tested at -55 deg C compared to the -40 deg C for TPS7A3001. The nominal value for Vref is the average of the values at either end of the temperature range. Moreover, these values are 'guardbanded' so there will be some outliers.

    Yes, the overall accuracy includes the variation in Vref. As i mentioned, these min and max values are guardbanded from a Gaussian distribution so there will be outliers.

    Best regards

    Ishaan