I read some of the discussion on "rail splitting" and it occurred to me that there should be a market for these devices. I am working on a design that will run op amps from a single rail and I need a 6V level, that can both source and sink current. The board is really tight. Presently it is using zeners to set a level (one for each channel to reduce crosstalk), but I was looking at using an LDO, with a resistor to sink current.
But the new design is going to have some higher current requirements, and this would be a consistent load using the resistor. The obvious solution would be to set a reference point using resistors, and an op amp to provide the drive. The reference point doesn't need to be highly accurate or stable. A cap would reduce noise.
I'm wondering if there are chips available that already do this providing say, 30 mA of drive/sink?