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LTC 3440 LTspice Simulation (using macromodel's test fixture) works w/ 100 ohm load resistor (0.033A) but not 13.2 Ohms (.25A)

In the default macromodel's test fixture for LTC3440, the default 100 ohms load works fine, output reaches 3.3V

100 Ohms (Default):

However, when I change Rload to 13.2V to test 0.25A output (which is under 600mA rating) then Vout stops at ~1.66V. 

13.2 Ohms (.25A)

Could I have any insight on how to remedy this?