Electrical characteristics
STM32F103xx
24/67
5.1.6
Power supply scheme
Figure 9.
Power supply scheme
Figure 7.
Pin loading conditions
Figure 8.
Pin input voltage
ai14141
C = 50 pF
STM32F103xx pin
ai14142
STM32F103xx pin
VIN
ai14125
3.3V
VDD
1/2/3/4/5
Analog:
RCs, PLL,
...
Po wer swi tch
VBAT
3.3 V
GP I/O s
OUT
IN
Kernel logic
(CPU,
Digital
& Memories)
Backup circuitry
(OSC32K,RTC,
Backup registers)
Wake-up logic
5 × 100 nF
+ 1 × 10 µF
1.8-3.6 V
Regulator
VSS
1/2/3/4/5
VDDA
VREF+
VREF-
VSSA
ADC
Level shifter
IO
Logic
VDD
10 nF
+ 1 µF
VREF
10 nF
+ 1 µF
VDD