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MC33063A: Query on Maximum Output DC Current

Part Number: MC33063A


What is the maximum DC Output current Iout(max) of the MC33063A IC

  • Hello Anurag,

    Thanks for reaching out to us via e2e.

    There is no fixed number for that.

    Here is a rough estimate:

    The limit for the PEAK inductor current on the INPUT side is 1.5A.
    Taking the efficiency and some margin into account, this PEAK current translates into about 1A of AVERAGE current on the input side.

    The average (DC) current on the output side then depends on the input to output voltage ratio: Iin * Uin = Iout * Uout.
    E.g. if the input voltage gets doubled, you can draw about 1/2 A DC on the output.

    Best regards