I am designing a digital system with various power supplies. I need to generate positive and negative supplies for a component. The voltages are +6.5 V and -2.5 V. Both supplies will pull in the ~5 mA to 10 mA load currents. I also will have a +2.5 voltage rail in the system that will have higher current in the couple of amps range.
I have an idea on how to do the +6.5 V with a buck converter, but the -2 V supply is giving me some trouble. Most solutions I have been finding have a maximum negative voltage ≥ 3 V.
Some have suggested split supplies, but I don't see many in the ±2 V range. regulating to a "higher" negative supply like -5 V and then regulating to -2.5 V would be an option, but seems like it would add additional space and power to my design, which I would like to avoid.
I would gladly take any recommendations.