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LMR38010-Q1: Faulty equation in Datasheet

Thomas Haase
Prodigy 10 points
Part Number: LMR38010-Q1

Tool/software:

In the Datasheet of the LMR38010-Q1 (SNVSC72B – FEBRUARY 2023 – REVISED JANUARY 2024):

The Equation 10 seems to be wrong. Going after the Equation, the required inductivity decreases with increased current. I don't think, that this is alright.

Can you please provide the correct Equation ?

Thanks in advance!

  • 0
    TI__Expert 8450 points

    Hi Thomas,

    This equation is for selecting the inductor based on acceptable ripple as a percentage of the load current. The inductor value determines the peak to peak ripple current. If the load current increases, the amount of ripple acceptable also increases (since it is set as a percentage of load current). So, as load current increases, a smaller inductor can be used as higher peak to peak ripple is acceptable.

    Regards,

    Niranjan