I could not find the part LTC3372 in LT-Power CAD are there other tools available to support the design?
We will not have an LTC3372 LTPC model for a few months. Meanwhile, the LTC3891 LTPowerCAD model or LTspice model can be used to model the LTC3372 HV converter.
The LTC3374 LTspice model can be used to simulate the transient response of the LTC3372 LV regulators. They use the same error amplifier.