Setting up a step down buck converter
Your datasheet covers 6 different part numbers. Some have fixed 3.3 V output, some have 5 V output, and some have adjustable output voltage. Some work with 1 MHz switching frequency and others work with 2.25 MHz switching. These PNs are further proliferated with different suffixes related to operating temperature range, mechanical package, etc.

The example circuit is for one of the adjustable-output variants.

To modify it for the 3.3-V fixed-output version, you'd eliminate the 191k resistor, and replace the 604k resistor with a wire.

You might also want to modify the inductor and capacitor selection to optimize control stability and load transient response. The details on how to do that should be found in the Applications section of the datasheet.

Also, you should be aware that this regulator has an absolute maximum input voltage of 17 V. Automotive environments are notorious not only for varying supply voltage, but also for occasional transients 10's of volts above the nominal voltage. You'll want to design a protection circuit to block these transients from reaching your converter chip.