Are the switching regulator models compatible with PSpice models and others?
The LTspice SMPS macromodels are implemented in a combination of new proprietary native LTspice devices and/or a proprietary hardware description language. While it is possible, in principle, to develop generic SPICE or PSpice macromodels, the resultant simulation speed would not be viable. LTspice can, however, run PSpice semiconductor and behavioral models and is generally a much higher performance simulator, so you might move your Pspice simulations to LTspice. Many users upgrade from PSpice to LTspice.