I'd like to design PoL converters for spaceflight applications and am particularly interested in designing with the TPS50601A-SP. I've downloaded the available PSPICE model file from the Texas Instruments website and I have imported them directly into SIMetrix for analysis. SIMetrix was unable to assign pins to the package, so I manually configured each pin to match the pin order in accordance to the package information displayed in the datasheet.
When running the example simulation, I'm receiving a floating node error both in SIMetrix and LTSpice. The issue seems to be with the PWPD pin, as I'm able to get the simulation running without grounding PWPD. When PWPD isn't grounded, the output voltage is reading 3.4V, rather than the circuit configured 2.5V output voltage I should be reading. The circuit was configured using the Texas Instruments provided example used in one of the Excel calculators. Any advice in getting this simulation to properly run would be greatly appreciated.