PSPICE-FOR-TI: LM76005 output is low by using it with a dual LISN for EMI simulation

Hello,

I am using Pspice or TI and I am running into a issue in simulations when I try to use the LM76005 and a dual lisn to simulate emi.

I took the reference design and added a lisn to the + and - line of the power supply. But the output of the step down converter goes to -10.23V which is my negative pole of the power supply.
If I place a gnd (0) node to the negative pole of the lisn (LISN_MINUS) and restart the simulation the output voltage is 3.3V as I aspected.  

 


Do you have any advice for me to use a lisn also for the negative power line?

Thank you,

Best regards,

Nico