I am designing a product which uses the LTC3122 as a 5V-12V boost converter (datasheet here). This particular device provides the ability to add gain compensation, phase lead, or both. In my case I am only using the gain compensation network, as seen in the image below:
R13 and C28 form the phase lead network (marked as "DNP" in my case since they are not populated), and R12 and C26 form the gain compensation network.
I calculated these values based on the requirements for my project, and now I would like to illustrate the effect that adding the compensation has on the output of the system. I want to do this by generating two Bode plots - one for the circuit with R12 and C26 included and one without. However, I seem to be having some difficulty generating these Bode plots. I attempted to perform an AC simulation of the design in LTSpice but received a warning saying that "This simulation calls a time-domain model...", effectively saying that the simulation would be pointless. I then tried following the process described in this link to obtain a Bode plot, but the simulation has been running for hours and still has not completed. The status bar at the bottom of the LTSpice window says it is 0.3% complete after running for almost four hours. I don't expect it will be able to find a solution. Below is an image of the LTSpice schematic pane:
What other methods could I use to obtain the Bode plot(s) for this boost converter? I went through the datasheet and, while it contains a large number of equations and formulas for poles and zeros, I'm still not convinced I have enough information to determine the full closed-loop transfer function of the model. I would greatly appreciate some assistance from someone more experienced with LTSpice and/or obtaining Bode plots of boost converters than I am. I am basically looking for a Bode plot like the one shown on Page 17 of the datasheet (below), but I want to be able to generate my own so that I can show a side-by-side illustrating the differences between the responses of the compensated vs. uncompensated systems.