Hi @andrewxiang ,
An IBB configuration should work with the MP2313.
You should have capacitors from VCC to GND, VCC to negative VOUT, and GND to negative VOUT.
This forum post should help in designing an IBB with a buck converter. Note that the MPS buck converter used is different, but the principal should be the same: MP2460: inverting buck regulator configuration - DC-DC Power Converters - Monolithic Power Systems’ Technical Forum
Thanks,
Rubas