I got the TI simulation tool for TPS54331 and set it as below.
* Input voltage: 15v , Output voltage: 10v , Output current: 0.5amp
The L1 is 47uH same as DX3-PRO. The Input and output capacitors is Panasonic 100uF/25v aluminum cap (ESR: 300mohm:facepalm:). The output ripple is 41.5mV.
Check...