LTSpice doesn't know what to do with complex Pspice models. How do resolve, "Unknown SPICE device type"?

Question

While trying to simulate a circuit that uses the TPSM33625 I get the error show below. 
 TPSM33625.asc

TheVeteran · Accepted Answer

Dear user. Your circuit diagram attempts to use an encrypted Texas Instruments Pspice based model of a switching converter. Unless you got a decrypted Pspice model from Texas Instruments, this will not work.
In case you got a decrypted Pspice model from TI, there are syntax differences between LTSpice and Pspice with a number of basic components that could create a model conversion issue. Have you tried downloading the TI publshed Pspice simulator tool? That would be my first step before doing anything else.