Step 1: Set the bench power supply current limit to 2 A. Set the power supply voltage to 12 V. Turn off the power supply output. Connect the power supply to the LMR12020 demo board. Positive connection to V_IN and negative connection to GND

Step 2: Connect a load, as high as 2 A, to the V_OUT terminal. Positive connection to V_OUT and negative connection to GND

Step 3: Turn on the bench power supply with no load applied to the LMR12020 and the shunt for the jumper J1 in place. The V_OUT would be in regulation at a nominal 3.3-V output. With the shunt out, a minimum load of 10 mA would be required to have the V_OUT in regulation at 5 V.

Step 4: Gradually increase the load and V_OUT should remain in regulation as the load is increased up to 2 Amps. The V_OUT should also be regulated when the input is swept from the minimum input to 20 V.