I recently completed, had manufacturer, and assembled my (second attempt at a) wide input buck regulator using the LMR16030SDDA regulator ICs. This time around I used the Texas Instruments WEBENCH Power Designer to give me a base circuit to base my design on. The criteria given to the Power Designer were 12V out, 2A load, 14-50V in. I am testing it at 24V in, and at 1.5A load the diode gets hot enough to hurt (sorry, I don't have an accurate thermometer to test it with). When running at 14V in, it still functions, and the diode doesn't get nearly as hot (though probably hotter than it should). While it does seem to work it's getting a lot hotter than I want it to for longevity sake and I know something is wrong, but I cannot figure out what. At 50V I'm guessing it would probably get hot enough to burn me, though I have not yet tested.
My schematic is spot on with the recommended schematic in WEBENCH and all of the components are the same values and spec as what they called for. Most are in fact the exact part number they gave to use.
Any advice or tips as to what might be causing the heat is greatly appreciated. I am very new to SMPS design and so I have limited abilities in troubleshooting... I could use some advice from some experts. I have assembled the circuit twice using different parts, I've tried adding input and output capacitance, and I've tried replacing the diode with a similar one (60V 3A vs original 100V 3A) with no effect.