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.