NB650A not work with output voltage higher 3.3V

Hello! I tried to use NB650A as buck converter with output voltage from 3.6 to 8.5 V.
Input voltage is 12V.
With low output voltages IC starts and works without load. But when I connect some load it stops. Looks like it enters in Short Circuit Protection mode.
With output voltages higher 5.5 volts it stops immediately after startup without any load. With 1-2A load situation is same.
I tried some changes, like changing On Time, removing Rump circuitry, adding filtering capacitor 100pF to FB pin, but all of it does not change situation significantly.
What can I do with this trouble?
There is my circutry: