Figure 3-2 and Figure 3-3 illustrate the PMP23389 voltage ripple waveforms. Output voltage ripple taken across C10 and input voltage ripple taken across J2 with 330μF capacitor across input to filter out high frequencies.

Figure 3-2 Output Voltage Ripple (AC Coupled) With 12V input and 15A Load; Measured 23.2mV Peak to Peak

Figure 3-3 Input Voltage Ripple (AC Coupled) With 12V Input and 15A Load; Measured 468mV Peak to Peak