2.1.4 Power Management Unit (PMU)

The PIC32CX1012BZ24032 device’s PMU has both DC-DC converter and a Main Low-Dropout (MLDO). The following figure shows the external components required for the internal buck regulator (DC-DC regulator). Using the same value of switching inductor (L1) and switching capacitor (C6 and C7) is recommended to get the same buck output performance.

The output of the DC-DC converter (buck) and MLDO is 1.35V and it is named “VDD_1P35V” power rail. The VDD_1P35V power rail is used to power the pins BUCK_CLDO (Pin 11), BUCK_BB (Pin 13), BUCK_PLL (Pin 16) and BUCK_LPA (Pin 17).