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LM4051-N: Spice model issue

Daria Kiseleva
Intellectual 2135 points
Part Number: LM4051-N

Tool/software:

Good day, colleagues,

My customer is using the SPICE model for LM4051_A1P2 in a simulation and need your attention on this topic:

There’s an issue with the order of the pins in this model. If I use the default pin order, P N, the model is generating unexpected results. But if I switch the pin order to N P, it works fine.

I haven’t seen this happen with other Zener reference models.

I’ve attached some snapshots below for your reference.

  1. Simulation results with matching pin-order (P N) -

2. Simulation results with reversed pin-order (N P) -

 

Thank you,

Daria

  • 0
    TI__Expert 6230 points

    Hi Daria,

    A few notes:

    1. The maximum reverse current for LM4051-N is 12 mA, and this is showing approximately 49 mA, so please increase the Rs value to decrease the current through the cathode.

    2. I am not seeing this behavior when I use PSPICE for TI. Which simulator is your customer using?

    Thanks,

    Jackson