TPS54340B: Negative output reference design

Hi Cooper,

We don't have a reference design for that specific part or output, but I do have a good starter guide. Theoretically TPS54340B and most other devices can be used in an IBB configuration as long as the circuit is set up properly. 

https://www.ti.com/lit/an/snva856a/snva856a.pdf?ts=1652285493685&ref_url=https%253A%252F%252Fduckduckgo.com%252F

Here is an EVM where we configured the TPS62913. It shows a good example of how you can use MOSFETS as level shifters for auxiliary pins like EN or FB.

https://www.ti.com/tool/TPS62913-IBB-EVM

Thanks,

Andrew

Also, if you get stuck during the design process let me know. I'll help you out.