Datasheet

DS12110 Rev 5 101/231
STM32H743xI Electrical characteristics
199
6.3.2 VCAP external capacitor
Stabilization for the main regulator is achieved by connecting an external capacitor C
EXT
to
the VCAP pin. C
EXT
is specified in Table 24. Two external capacitors can be connected to
VCAP pins.
Figure 16. External capacitor C
EXT
1. Legend: ESR is the equivalent series resistance.
6.3.3 Operating conditions at power-up / power-down
Subject to general operating conditions for T
A
.
Table 25. Operating conditions at power-up / power-down (regulator ON)
4. If T
A
is lower, higher P
D
values are allowed as long as T
J
does not exceed T
Jmax
(see Section 7.9: Thermal characteristics).
5. In low-power dissipation state, T
A
can be extended to this range as long as T
J
does not exceed T
Jmax
(see Section 7.9:
Thermal characteristics).
Table 24. VCAP 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 2.2 µF
(2)
2. This value corresponds to CEXT typical value. A variation of +/-20% is tolerated.
ESR ESR of external capacitor < 100 m
069
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Symbol Parameter Min Max Unit
t
VDD
V
DD
rise time rate 0
∞
µs/V
V
DD
fall time rate 10
∞
t
VDDA
V
DDA
rise time rate 0
∞
V
DDA
fall time rate 10
∞
t
VDDUSB
V
DDUSB
rise time rate 0
∞
V
DDUSB
fall time rate 10
∞