2011-2012 Microchip Technology Inc.
DS39995C-page 25
PIC24FV32KA304 FAMILY
2.4
Voltage Regulator Pin (VCAP)
Some of the PIC24F K devices have an internal voltage
regulator. These devices have the voltage regulator
output brought out on the VCAP pin. On the PIC24F K
devices with regulators, a low-ESR (< 5) capacitor is
required on the VCAP pin to stabilize the voltage
regulator output. The VCAP pin must not be connected to
VDD and must use a capacitor of 10 F connected to
ground. The type can be ceramic or tantalum. Suitable
Capacitors with equivalent specifications can be used.
equivalence of candidate devices.
The placement of this capacitor should be close to VCAP.
It is recommended that the trace length not exceed
for additional information.
information on VDD and VDDCORE.
FIGURE 2-3:
FREQUENCY vs. ESR
PERFORMANCE FOR
SUGGESTED VCAP
Note:
This section applies only to PIC24F K
devices with an on-chip voltage regulator.
10
1
0.1
0.01
0.001
0.01
0.1
1
10
100
1000 10,000
Frequency (MHz)
ES
R
(
)
Note:
Typical data measurement at 25°C, 0V DC bias.
TABLE 2-1:
SUITABLE CAPACITOR EQUIVALENTS
Make
Part #
Nominal
Capacitance
Base Tolerance
Rated Voltage
Temp. Range
TDK
C3216X7R1C106K
10 F
±10%
16V
-55 to 125C
TDK
C3216X5R1C106K
10 F
±10%
16V
-55 to 85C
Panasonic
ECJ-3YX1C106K
10 F
±10%
16V
-55 to 125C
Panasonic
ECJ-4YB1C106K
10 F
±10%
16V
-55 to 85C
Murata
GRM32DR71C106KA01L
10 F
±10%
16V
-55 to 125C
Murata
GRM31CR61C106KC31L
10 F
±10%
16V
-55 to 85C