Tool/software:
We are currently using the TPS7H1111-SP PSpice model and running into significant issues with correlation of the phase margin and gain margin. We have tested with varying load currents and different combinations of capacitors at the output for stability. When the model is simulated and plotted on a bode plot both the phase and gain margin dip much lower than expected from the datasheet. The phase margin has a steep drop at the 2k-3k with the model while the datasheet documentation shows this should happen around a frequency of 10k. Coincide with this, the gain margin will peak significantly higher than expected at the same frequency and drop lower than reported in the datasheet
Is there a better model that we can use?
Why is the model behaving this way when simulated?
What other solutions can we try to amend this?
So far we have tried to apply load currents of 0A, 1A, and 1.5A while also including 2 x 100uF capacitors or 1 x 220uF capacitor at the output.
