To test OVP, the device is operated in Config 'OVP test' (CFG0 = 11, CFG1 = 12, CFG2 = 2), changing the OVP level to 28.5V (OVP bits equal to [11]) and setting the target output voltage beyond that threshold (36V in this case). The result is visible in Figure 4-3. The device starts switching (green waveform), trying to reach the intended output voltage (waveform in yellow), but as soon as the device hits the OVP threshold, the device stops switching; the output voltage then starts to decrease until the device falls below the OVP level, and the same cycle repeats. How fast the output voltage decreases below OVP level depends on the load current. Here, a 3A load was used for the test.

Figure 4-3 Over-voltage Protection Behavior