Many thanks for the series of amazing buck-boost regulators you offer. I love them and I use them all the time.
One thing I miss is a series of “inverting buck-boost regulators”. I understand these can be easily built in a way similar to the usual buck-boost regulators: see e.g. https://www.ti.com/lit/an/snva856b/snva856b.pdf?ts=1727130007409&ref_url=https%253A%252F%252Fwww.google.com%252F .
This would allow for example to generate both a stable +5V and a stable -5V supply for operating devices that work best with dual inputs, such as op-amps and quite many analog components.
For now what I can do is use your charge pump voltage inverter ( Pololu - Charge Pump Voltage Inverter: 1.8-5.3V, 60mA ) after one of your buck-boost regulators to generate both +V and -V from Vin.
However:
- your pump voltage inverter has quite limited characteristics compared with most of your other products (in particular, quite limited current output, and not very “constant” output under load)
- pump voltage inverters are less efficient than buck boosts
- using the pump voltage inverter “on top of” the buck boost means that the single buck boost must provide power for both the +V and the -V supply, so twice as much load on it, compared to having 1 buck boost supplying only +V, and 1 buck boost supplying only -V.
Would it be possible that you offer such inverting buck-boost regulators for classical voltages? (e.g. 3.3V, 5V, and maybe some more of the “higher voltages”)? In the meantime, would you also be able to offer a more powerful pump voltage inverter?