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LMS3655: Vref

Kuramochi Tadahiko
Guru 28715 points
Part Number: LMS3655

Hi,

Vref is specified as below;

On the other hand, "±1.5% Reference Voltage Tolerance" is mentioned on the 1st page of the datasheet.

Is this typo?

Best Regards,

Kuramochi

  • 0
    TI__Genius 11040 points
    Hi Kiramochi,

    Yes, you are correct that there are two different ranges called out for Reference Voltage Tolerance.

    The EC table refers to a Reference Voltage Tolerance of +/-1% from Tj=-40C to 125C. The front page refers to a Reference Voltage Tolerance of +/- 1.5%. The front page value refers to Tj=-40C to 150C.

    Please let me know if anything is still unclear.

    Best Regards,
    Katelyn Wiggenhorn
  • 0
    TI__Expert 3840 points
    Hi,

    The +/- 1.5% stated on the first page is for the fixed-output 3.3V & 5.0V options over all VIN conditions and across the temperature range as stated on the EC table as VFB. The Vref value you have referenced above is for the adjustable versions, which do not take into account the resistor divider tolerances used by the customer and it's also specified at a single VIN of 13.5V.


    Best Regards,
    -JP