Datasheet

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STM32F413xG/H Electrical characteristics
174
6.3.2 VCAP_1/VCAP_2 external capacitors
Stabilization for the main regulator is achieved by connecting the external capacitor C
EXT
to
the VCAP_1 and VCAP_2 pins. For packages supporting only 1 VCAP pin, the 2 CEXT
capacitors are replaced by a single capacitor.
C
EXT
is specified in Table 19.
Figure 23. External capacitor C
EXT
1. Legend: ESR is the equivalent series resistance.
6.3.3 Operating conditions at power-up/power-down (regulator ON)
Subject to general operating conditions for T
A
.
Table 20. Operating conditions at power-up / power-down (regulator ON)
Table 19. VCAP_1/VCAP_2 operating conditions
(1)
1. When bypassing the voltage regulator, the two 2.2 µF V
CAP
capacitors are not required and should be
replaced by two 100 nF decoupling capacitors.
Symbol Parameter Conditions
CEXT
Capacitance of external capacitor with the pins
VCAP_1 and VCAP_2 available
2.2 µF
ESR
ESR of external capacitor with the pins VCAP_1 and
VCAP_2 available
< 2 Ω
CEXT
Capacitance of external capacitor with a single VCAP
pin available
4.7 µF
ESR
ESR of external capacitor with a single VCAP pin
available
< 1 Ω
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(65
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&
Symbol Parameter Min Max Unit
t
VDD
V
DD
rise time rate 20 ∞
µs/V
V
DD
fall time rate 20 ∞
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