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TPS628501-Q1: the internal resistor precision of the fixed voltage version TPS628501-Q1

Shoo Saga
Intellectual 1931 points
Part Number: TPS628501-Q1

Hello team,

My customer are comparing the fixed voltage version of TPS628501-Q1 to the adjustable version of the one.

In terms of the voltage precision, which is better if adjustable version use 1% resistors for feedback pin?

and they also want to know the specification of the internal resistor of the fixed voltage version TPS628501-Q1.

Do your team have the data of min/typ/max internal resistor tolerance and Temperate Coefficient as well?

Thanks,

Shoo

  • +1
    TI__Expert 7605 points

    Hi Shoo,

    Thanks for your question.

    The device regulates the voltage on the FB pin with a 1% accuracy.

    Since for a fixed VOUT version VFB is directly connected to VOUT, we have a total accuracy of 1%.

    Instead for the adjustable version we also have to consider the contribution of external resistors and parasitics.

    In general, the fixed VOUT versions are recommended for a better accuracy.

    Thanks,

    Stefano