Hi vladimir.rajovic,
Please see the equation on Pg. 12 of the datasheet for setting the output voltage. I used your feedback resistor values and got an output voltage of 4.98V. The datasheet notes that there will be some variation in the real circuit, so I would suggest just slightly altering the resistors if possible.
I do not recommend that you connect the NC pins 5, 6, and 8 to the input. Please leave those pins unconnected, as noted on Pg. 9 of the datasheet. Lastly, please use this equation from Pg. 15 of the datasheet to verify the size of your inductor.
