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Need help on LM22671 step down converter

Madhavarao Teketi
Prodigy 10 points

  • Can anyone please provide the variation in Feedback Reference Accuracy with respect to temperature (example like -25 degree to 85 and 100 degree)  ?
  • As per the data sheet feedback Reference Accuracy is mentioned as +/-1.5%, but we need particular feedback reference accuracy at certain temperation as per our load condition.

Below mentioned the link for the datasheet

http://www.ti.com/lit/ds/symlink/lm22671.pdf

Thanks & Regards

Madhav 

  • 0
    TI__Expert 3870 points

    Hi Madhav,

    Our datasheet covers temperature range of -40C to 125C for the feedback voltage VFB.  Page 4 of the datasheet has these values. For the Adjustable Output Voltage version the minimum = 1.259V, the typical = 1.285V, the Max = 1.311V.  This parameter does not change with load conditions since it's an internal reference, but your output voltage will be dependent on the accuracy of the resistor divider.  The fixed version of Vout = 5.0V has VFB min = 4.9V, typ=5.0V and max = 5.1V.

    Best Regards,

    -Juan