L4973V5.1 Circuit diagram for buck operation

[LJ_it]

I am designing a buck converter with E-design suite using L4973V5.1 it shows a completely different circuit diagram as compared to datasheet application circuit which is confusing to me. Pinout is looking different for L4973V5.1 in E-Design Suite w.r.t to datasheet circuit. I have attached both circuits as one can clearly see the difference in Pins configuration in both the circuits.