TPS65131 Split-Output Booster Supply
Generating a negative voltage over -5V is kinda annoying: most chargepumps max out at 5V inversion, and ones that can double-then-invert like the MAX232 aren't high current. We bumped into the TPS65131
https://www.digikey.com/en/products/detail/texas-instruments/TPS65131RGER/1672464
while working on our Floppsy design
With the big new Adafruit factory, and Ladyada & pt’s move to Brooklyn also complete, it’s time to turn our attention to some older projects
- we need -12V to bias the Apple Disk ][ drive control system. It's a combo buck and boost: give it 3~5VDC and give you up to -15V and +15V output. The split supply part is particularly nice because you'll want +-12V or +-15V for analog projects. This standalone power supply breakout has two mini trim pots to help adjust the output voltages on both sides so you can have as little as +/-6V and up to +/-15V. With the 2A internal switches, you'll get a fair amount of current on either rail.
