4.1 Power Supplies

The device has several types of power supply pins. The figure and table below show power domains depending on the different power supply pins and supply description.
Table 4-1. Power Supplies
Supply NameDescription
VDD3V3(1)
  • Input/Output buffers supply
  • Flash memory charge pumps supply for read, erase and program operations
  • EMAFE digital functions supply
  • Internal power switch input
  • Core voltage regulator input
  • LCD voltage regulator input
  • Analog block supply (ADC, Temp Sensor, voltage reference, Analog Comparator)
VDDOUTOutput of the embedded core voltage regulator
VDDIN_AFE(1)EMAFE 2.8V LDO power supply input
VDDLCD(4)LCD voltage regulator input/output for the LCD Driver and its logic
VDDCORE(2, 3)Core, memories and peripheral logic supply
VDDPLL(2, 3)PLLA, PLLB and PLLC supply
VDDA(5)EMAFE 2.8V LDO output and analog circuits power supply input
VBATInternal power switch input
VDDBUOutput of the internal power switch (VBAT or VDD3V3) powering the backup area
Note:
  1. VDD3V3 and VDDIN_AFE are powered from one single power source such that V(VDD3V3,VDDIN_AFE) ≤ ±50mV.
  2. Applies only when VDDCORE and VDDPLL are powered from an external regulator.
  3. VDDCORE and VDDPLL are powered from one single power source such that V(VDDCORE,VDDPLL) ≤ ±50mV.
  4. At any time, VDDLCD ≤ VDD3V3.
  5. Applies only when VDDA is powered from an external regulator.
Figure 4-1. PIC32CXMTSH Power Domains