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TPS63802: Current Comsumption during Boosting

David Tandri
Expert 1355 points
Part Number: TPS63802

Hi,

I have configured my TPS63802 regulator to output 3.7V. The input to the regulator is a li-po cell.

My question is:

If the input voltage is at 3.2V, the output will be boosted to 3.7V. Does this boosting consume current?

If yes, how much current is consumed by the regulator?

Thanks

  • 0
    TI__Expert 7925 points

    Hi David,

    No converter is perfect, there are always some losses, and the efficiency is always below 100%. For your operating conditions, and assuming the device operates in power-save mode (MODE pin connected to GND), this is a typical efficiency as a function of output current:

    Vin = 3.2 V, Vout = 3.7 V, PFM mode, room temperature:



    For example, if the output current is 200 mA, the efficiency is 92%, and the input current is:

    Iin = (Vout * Iout) / Vin / eff = 251 mA

    Best regards,
    Milos