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TPS62840: STOP Mode timing

Gregory Duperon
Expert 7470 points
Part Number: TPS62840

Do we have data on the time it take the regulator to stop switching once the device is disabled?

We have a regulator startup delay time in the datasheet?  What about when disable or STOP is asserted?

  • 0
    TI__Mastermind 37051 points

    Hi Gregory,

    We will look into your queries and respond to you immediately.

    By the way, how critical is the delay between STOP pin goes High and the device stop switching in customer application? And what is an acceptable delay?

    Thank you.

    Best regards,

    Excel

  • 0 in reply to Excel Regidor
    TI__Mastermind 37051 points

    Hi Gregory,

    When the device is switching and the STOP pin goes High, the low-side FET turns ON and it will be ON until the inductor current goes to zero (demagnetize the inductor) then it will stop switching. The max delay from STOP pin goes High until the device stop switching can be calculated using the formula below.

    In case the device is at Pause state, then there will be no switching anymore.

    Delay = (Lout_max / VOUT_min) x IL_max

    *refer to the figure below for details


    Best regards,

    Excel