Display CH1 (PH1) and CH2 (VOUT1) [DC coupled, 500 mV/div] on the oscilloscope to monitor the switching phase and the soft start profile of the output voltage as shown in Figure 4-3.

Figure 4-3 Output Soft Start Voltage, VIN = 5 V, VOUT = 2.5 V, IOUT = 3 A