Switcherpro only supports the Buck topology. I do not think there is any specific literature for TPS54231 inverting buck boost, but you can use the general procedure here:
http://www.ti.com/lit/an/slva317b/slva317b.pdf
Switcherpro only supports the Buck topology. I do not think there is any specific literature for TPS54231 inverting buck boost, but you can use the general procedure here:
http://www.ti.com/lit/an/slva317b/slva317b.pdf