This is reference design 1:
This is reference design 2:
We are using a zener diode (MMSZ4702T1G) and a resistor (10 kΩ) to split +24 V into +15 V and -8 V, but when we connect the load +15V decreases to +12V and -8V decreases to -12V.
Here is our schematic:
How can we improve this design, and how much current can be drawn from this setup?
Are there any alternatives for generating an isolated +15 V and -8 V from a single supply?