It's been asked quite a few times how to import PSpice models into LTspice but none of the methods seem to apply to this particular model from TI. I really don't understand what all these files are inside the .zip. Isn't there supposed to be a .lib file somewhere which we can link to a component?
Here is a model for the OPA313 if you follow the link and scroll down a bit.
Under sbomaq3b\opa313-PSpiceFiles\SCHEMATIC1\transient there is a .cir file which my computer seems to think is an LTspice netlist file. Opening it in LTspice gives me this: