PIC32MX795F512L-80IPT Datasheet, PDF (7/68 Pages) Microchip Technology – PIC32 Flash Programming Specification

4.3 Power Requirements
Devices in the PIC32 family are dual voltage supply
designs. There is one supply for the core and
another for peripherals and I/O pins. All devices
contain an on-chip regulator for the lower voltage
core supply to eliminate the need for an additional
external regulator. There are three implementations
of the on board regulator:
• The first version has an internal regulator that can
be disabled using the ENVREG pin. When disabled,
an external power supply must be used to power the
core. If enabled, a low-ESR filter capacitor must be
connected to the VCAP pin (see Figure 4-2).
• The second version has an internal regulator that
cannot be disabled. A low-ESR filter capacitor must
always be connected to the VCAP pin.
• The third version has an internal regulator that
cannot be disabled and does not require a filter
capacitor
Please refer to Section 20.0 “AC/DC Characteristics
and Timing Requirements” and the “Electrical
Characteristics” chapters in the specific device data
sheet for the power requirements for your device.
PIC32
FIGURE 4-2:
INTERNAL REGULATOR
ENABLE/DISABLE
OPTIONS
Regulator Enabled⁽²⁾
(ENVREG tied to VDD)
3.3V
PIC32
VDD
ENVREG
CEFC
(10 F typical)
VCAP
VSS
Regulator Disabled⁽²⁾
(ENVREG tied to ground)
1.8V⁽¹⁾ 3.3V⁽¹⁾
PIC32
VDD
ENVREG
VCAP
VSS
Note 1:
These are typical operating voltages. Refer
to Section 20.0 “AC/DC Characteristics and
Timing Requirements” for the full operating
ranges of VDD and VCAP.
2: Regulator Enabled and Regulator Disabled
mode are not available on all devices.
Please refer to the specific device data
sheet to determine availability.
 2007-2013 Microchip Technology Inc.
DS61145L-page 7