This enquiry relates to using the simulation models for the device.
Texas TPS65381-Q1 simulation notes
The original issue was with the VDD6 section of the model, I had tried using Tina TI as the simulator but couldn't manage to get the model circuit to work, not being well versed in Tina I reverted to my work horse simulator LTSpice. Downloaded the spice models, initially concentrated on the Vdd6 section and after a bit of faffing about managed to get the buck converter to work okay, see figure 1.
The other sections Vdd5 and Vdd1 worked fine, but Vdd3-5 brings up an error relating to d120nq045, see figure 2. I can only think this is internal to the model but cannot locate a line in the model that might relate to error message.
Any pointers would be greatly appreciated, the other issue is the ghost connections on the different model sections that don’t relate to chip pin outs (I imagine they are internal functions). Have had to guess what they are and mean and use trial and success to see how they might be connected
Just for completeness have include the other simulation circuits for the chip.
Thanks Paul Hillman
Figure 1 Vdd6 simulation
Figure 2 Vdd3-5 simulation
The other simulations
Figure 3 Vdd5
Figure 4 Vdd1