Datasheet

DS9118 Rev 14 57/149
STM32F303xB STM32F303xC Electrical characteristics
125
6.1.6 Power supply scheme
Figure 11. Power supply scheme
1. Dotted lines represent the internal connections on low pin count packages, joining the dedicated supply
pins.
Caution: Each power supply pair (V
DD
/V
SS
, V
DDA
/V
SSA
etc..) 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 the good
functionality of the device.
MS19875V5
Level shifter
Analog: RCs,
PLL,comparators, OPAMP,
....
Power
switch
ADC/DAC
Kernel logic
(CPU,
digital
& memories)
I/O logic
Backup circuitry
(LSE, RTC,
Wakeup logic,
Backup registers)
V
BAT
1.65 – 3.6 V
GP I/Os
V
DD
OUT
IN
Regulator
4 x V
DD
4 x V
SS
V
DDA
V
DDA
V
REF+
V
REF-
V
SSA
4 x 100 nF
+ 1 x 4.7 μF
10 nF
+ 1 μF
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