Datasheet

DocID030538 Rev 3 95/226
STM32H743xI Electrical characteristics
196
6.1.6 Power supply scheme
Figure 13. Power supply scheme
1. N corresponds to the number of VDD pins available on the package..
Caution: Each power supply pair (V
DD
/V
SS
, V
DDA
/V
SSA
...) must be decoupled with filtering ceramic
capacitors as shown above. These capacitors must be placed as close as possible to, or
below, the appropriate pins on the underside of the PCB to ensure good operation of the
device. It is not recommended to remove filtering capacitors to reduce PCB size or cost.
This might cause incorrect operation of the device.
MSv46116V3
BKUP
IOs
VDD domain
Analog domain
Core domain (V
CORE
)
Backup domain
D3 domain
(System
logic,
EXTI,
Peripherals,
RAM)
D1 domain
(CPU, peripherals,
RAM)
Level shifter
OPAMP,
Comparator
Voltage
regulator
ADC, DAC
Flash
D2 domain
(peripherals,
RAM)
Power
switch
Power switch
V
CAP
V
SS
V
DDLDO
V
BAT
V
DDA
V
REF+
V
REF-
V
SSA
Backup
regulator
V
DD
Backup
RAM
Power switch
HSI, CSI,
HSI48,
HSE, PLLs
IOs
Power
switch
USB
regulator
V
DD50USB
V
DD33USB
V
SS
V
SS
V
SS
REF_BUF
V
SS
IO
logic
V
REF+
USB
IOs
V
SS
V
SW
LSI, LSE,
RTC, Wakeup
logic, backup
registers,
Reset
IO
logic
V
BKP
VBAT
charging
V
REF-
V
DDA
V
BAT
1.2 to 3.6V
2 x 2.2μF
N
(1)
x 100 nF
+ 1 x 4.7 μF
100 nF
100 nF + 1 x 1 μF
4..7μF
100 nF
V
DD
V
DDLDO
100 nF + 1 x 1 μF
V
REF
V
DD33USB
V
DD50USB
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