PIC24F16KA102_11 Datasheet, PDF (19/278 Pages) Microchip Technology – 20/28-Pin General Purpose, 16-Bit Flash Microcontrollers with nanoWatt XLP Technology

PIC24F16KA102 FAMILY
2.4 Voltage Regulator Pin (VCAP)
Note: This section applies only to PIC24F K
devices with an on-chip voltage regulator.
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 (< 5Ω) 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 µF connected to
ground. The type can be ceramic or tantalum. Suitable
examples of capacitors are shown in Table 2-1.
Capacitors with equivalent specifications can be used.
Designers may use Figure 2-3 to evaluate ESR
equivalence of candidate devices.
The placement of this capacitor should be close to VCAP.
It is recommended that the trace length not exceed
0.25 inch (6 mm). Refer to Section 29.0 “Electrical
Characteristics” for additional information.
Refer to Section 29.0 “Electrical Characteristics” for
information on VDD and VDDCORE.
FIGURE 2-3:
10
FREQUENCY vs. ESR
PERFORMANCE FOR
SUGGESTED VCAP
1
0.1
0.01
0.001
0.01
0.1
1
10
100
Frequency (MHz)
1000 10,000
Note:
Typical data measurement at 25°C, 0V DC bias.
TABLE 2-1:
Make
TDK
TDK
Panasonic
Panasonic
Murata
Murata
SUITABLE CAPACITOR EQUIVALENTS
Part #
Nominal
Capacitance
Base Tolerance Rated Voltage Temp. Range
C3216X7R1C106K
C3216X5R1C106K
ECJ-3YX1C106K
ECJ-4YB1C106K
GRM32DR71C106KA01L
GRM31CR61C106KC31L
10 µF
10 µF
10 µF
10 µF
10 µF
10 µF
±10%
±10%
±10%
±10%
±10%
±10%
16V
-55 to 125ºC
16V
-55 to 85ºC
16V
-55 to 125ºC
16V
-55 to 85ºC
16V
-55 to 125ºC
16V
-55 to 85ºC
 2008-2011 Microchip Technology Inc.
DS39927C-page 19