UCC28750: Looking for a PSPICE file or similar

I am looking for a component that, together with an electronic design, converts 540V (DC) input into 28V (DC) output with a current output range of 1A to 3 A.

After doing a search, I found the UCC28750 chip, but there is no PSPICe or similar file that I can download and use to simulate the system.

Has anyone done a simulation with this chip?
Is there anything similar to the UCC28750?

I attach in an image the circuit that we want to create for the voltage conversion that I have mentioned.

Thanks in advance,
Asier