Hello,
I have to do negative voltage regulator using LM723. I've done da calculations, but I'm having problem to design the schematic. I've look all over the net but didnt find anything... Can someone help. I'm looking only for schematic.

 

Have you look to the datasheet
http://www.iele.polsl.pl/elenota/National_Semiconductor/lm723jan.pdf

 

Yes, I did. I forget to tell that the load current is 6A, and the output voltage is -36V. So I need a external Darlington and extra voltage divider, but I dont know how exactly to connect them.

 

Design positive 36V/6A voltage regulator.
Then convert the circuit to negative voltage regulator.

 

This is exactly my problem. How to do that?

Connect the Vin to the Non-Inverting input and Vref to the Inverting input of the Op-Amp?

Do I have to change the type of the transistors? (NPN or PNP)

 

Here you have a little tip