A product I am working on requires a -12V supply for a couple of OP-AMPS.
I'm currently using a circuit based around the LM2575-12 - but I think it's a bit of overkill, as it can supply 1000 mA of current and uses a big 330uH inductor which is 12mm x 12mm.
Whereas I only need about 100 mA on the -12V rail. (I could use a physically smaller inductor, since I only need 100 mA).
There is a +24V supply, from which I also derive +5 V DC and +12 V DC rails.
So, the question is :
How would you generate the -12V rail? Is there a simpler / smaller circuit than one based around the LM2575?
Here is the existing circuit: