Datasheet

PIC24FJXXXGA0XX
DS39768D-page 2 © 2008 Microchip Technology Inc.
The regulator provides power to the core from the other
V
DD pins. A low-ESR capacitor (such as tantalum) must
be connected to the V
DDCORE pin (Figure 2-2 and
Figure 2-3). This helps to maintain the stability of the
regulator. The specifications for core voltage and capac-
itance are listed in Section 7.0 “AC/DC Characteristics
and Timing Requirements”.
FIGURE 2-2: CONNECTIONS FOR THE
ON-CHIP REGULATOR
(64/80/100-PIN DEVICES)
FIGURE 2-3: CONNECTIONS FOR THE
ON-CHIP REGULATOR
(28/44-PIN DEVICES)
VDD
ENVREG
V
DDCORE/VCAP
VSS
PIC24FJXXXGA0XX
CEFC
3.3V
Regulator Enabled (ENVREG tied to VDD):
(10
μF typ)
Note 1: These are typical operating voltages. Refer
to
Section 7.0 “AC/DC Characteristics and
Timing Requirements”
for the full operating
ranges of V
DD and VDDCORE.
VDD
ENVREG
V
DDCORE/VCAP
VSS
PIC24FJXXXGA0XX
3.3V
(1)
2.5V
(1)
Regulator Disabled (ENVREG tied to ground):
VDD
ENVREG
V
DDCORE/VCAP
VSS
PIC24FJXXXGA0XX
2.5V
(1)
Regulator Disabled (VDD tied to VDDCORE):
VDD
DISVREG
V
DDCORE/VCAP
VSS
PIC24FJXXXGA0XX
3.3V
(1)
2.5V
(1)
Regulator Disabled (DISVREG tied to VDD):
VDD
DISVREG
V
DDCORE/VCAP
VSS
PIC24FJXXXGA0XX
2.5V
(1)
Regulator Disabled (VDD tied to VDDCORE):
VDD
DISVREG
V
DDCORE/VCAP
VSS
PIC24FJXXXGA0XX
CEFC
3.3V
(10 μF typ)
Regulator Enabled (DISVREG tied to V
SS):
Note 1: These are typical operating voltages. Refer
to
Section 7.0 “AC/DC Characteristics and
Timing Requirements”
for the full operating
ranges of V
DD and VDDCORE.