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LTM4608A Equivalent Part Number for LTpowerCAD Evaluation

Is there a functionally equivalent component to the LTM4608A that can be used in LTpowerCAD for evaluating stability loop margins, output impedance, and efficiency?

Upon initial search, I found an Excel design tool for the LTM4608, which differs in part number and lacks output impedance and efficiency calculations.  Ideally, a part equivalent of the LTM4608A for an LTpowerCAD design would be best. 

Otherwise - is there an application note or reference for extracting stability loop margins, output impedance, and efficiency as is done "under the hood" in LTpowerCAD?