Hello engineers,
I'm a beginner with the EE-Sim simulation tools so I hope you can find a clue to my problem. I've simulated the MAX17575 converter for the schematic and conditions given below with the online tool: 
From the efficiency simulation, I got the following curve, stating an efficiency of 89.8 % for a load current of 333 mA at 5 V output voltage. 
Comparing this with the efficiency curve on the datasheet of MAX17575 for 36 V on page 1 (green curve), this seems plausible.
However, when I download the schematic and simulate it with the EE-Sim OASIS simulator, the efficiency calculator calculates only 79.8% for the same operating conditions:
I calculated the efficiency also by averaging the output waveforms of input and output voltages and currents, leading to the same result. I checked the simulation frequency, it is set to 400 kHz.
How can such a large difference of nearly 10% occur? Is this an error in the simulation model of the MAX17575 in the OASIS simulator? I checked the same circuit with the MAX17574 model, there the online tool and the OASIS simulator result almost in the same efficiency figures.
Thank you
