Q:

MC34063ADR overheats and burns

I am trying to get -13.5V from mc34063. 
On the first design, I used 8DIP package MDR34063AP and no problem getting -13.5V. 
On the second design changed the package to 8-soic and used S1B-13F (100V 1A diode), which are replacements with same characteristics.
However, after 2 seconds IC starts to consume more and more current gets hot and burns. 
When I increased the R22=1R resistor to 2.5R, it doesn't overheat but I can't get -13.5V anymore. It stays around -9V. 
Any comment or help would be really useful, 
Thank you for your time.
Design 1

Design 2
 

A:

1B-13F, 1N400x are inappropriate for SMPS designs- too long recovery time even for a pig of a chip like 34063- and not even specified so the specs can be met yet the diodes can be very different.
Use a Schottky diode like the datasheet shows. An ultra fast diode such as UF4004 can also be used.
Inductor saturation is another thing to look for if that part changed.

