I'm looking to generate -4.25V from +12V using the LMZ22008 simple switcher and having trouble getting it to run. During debug, I have a very light load (100mA) and I'm getting my Vout to look like...
I followed your AN2027 EXCEPT that it does not mention what to do with the SYNC input. I want the unit always enabled, so I left EN open. If I want it to control SYNC internally (no external SYNC applied), what do I do with this input?
For example...+12V on left, -4.25V on right.
Thanks for your help. Tom.