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?