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LM251772: Unclarities

Michel LIENHARD33
Prodigy 110 points
Part Number: LM251772

Tool/software:

Hello,

On this P/N, there are a couple of unclarities

1) If SCL and SDA are not used, should they have pull-up or pull-down resistors ? (Data sheet is not clear, webench has pull downs)

2) Pin VIN-FB: exists on webench but not on data-sheet

Best regards

Michel

  • 0
    TI__Guru 58641 points

    Hi Michael,

    thank you for using the E2E forum.

    1) as the device powers up in standby mode and needs to be enabled via I2C, I recommend to use I2C otherwise the device will stay in standby forever.

    2) you are right this needs to be updated on Webench. Thanks for the info.

    If you are using the quickstart calculator you will this already reflected according to the datasheet.

    Best regards,

     Stefan