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LSF0108: About the ron value

tsuyoshi tokumoto
Expert 2630 points
Part Number: LSF0108

Hi team,

  I think that the ron value of Vref_A=1.8V and Vref_A=2.5V described on page6
  on the data sheet are opposite.

Is my thinking wrong?

Sincerely,
Tsuyoshi Tokumoto

  • 0
    TI__Guru 62140 points
    Tsuyoshi Tokumoto san,

    I believe that the Vi was at 1.8V for the 2nd condition, but I do not see that specific values listed on the datasheet. The LSF ron specs are the typical values which are mentioned in the datasheet and are not guaranteed across devices.
  • 0 in reply to ShreyasRao
    Expert 2630 points

    Hello Shreyas-san,

      Thank you for your prompt reply.

      The data sheet indicates that the ron value(=10Ω) at
       Vref_A=1.8V(Vi=0,Io=32mA) is lower than the ron value(=15Ω) at
       Vref_A=2.5V(Vi=0,Io=32mA).

       I understand the gate voltage of internal FET is biased to Vref_A+Vth.
       In addition,I understand that if the other measurement conditions are
       the same,the higher the gate voltage is, the lower the ron will be.

       From the above,I think the ron value at Vref_A=2.5V is lower than the ron value
       at Vref_A=1.8V.

        Is my thinking wrong?

    Thank you and best regards,
    Tsuyoshi Tokumoto

  • 0 in reply to tsuyoshi tokumoto
    TI__Guru 62140 points
    Hi Tsuyoshi san,

    Yes, your understanding is correct.
  • 0 in reply to ShreyasRao
    Expert 2630 points

    Hi Shreyas-san,

      I appreciate your quick response.
      My question has been cleared up!


    Thank you and best regards,
    Tsuyoshi Tokumoto