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TL431-Q1: TL431-Q1

Part Number: TL431-Q1

Hello TI Team,

I am driving the 2 led load in series with the help of nmos and shunt regulator to maintain the 2.5V across the mosfet.

While I downloaded the pspice model online but In cadence i received the session error mentioned in the below image.

 .

Could you please support. How I can simulate the circuit using this model in the cadence pspice ?

Also, please let me know how we can set the voltage reference also.