Power Controller (Pwr); Power Supplies; Figure 9. Power Supply Overview For Stm32F405Xx/07Xx And Stm32F415Xx/17Xx - STMicroelectronics STM32F405 Reference Manual

Power controller (PWR)

5 Power controller (PWR)
This section applies to the whole STM32F4xx family, unless otherwise specified.
5.1

Power supplies

The device requires a 1.8 to 3.6 V operating voltage supply (V
voltage regulator is used to supply the internal 1.2 V digital power.
The real-time clock (RTC), the RTC backup registers, and the backup SRAM (BKP SRAM)
can be powered from the V
Note: Depending on the operating power supply range, some peripheral may be used with limited
functionality and performance. For more details refer to section "General operating
conditions" in STM32F4xx datasheets.

Figure 9. Power supply overview for STM32F405xx/07xx and STM32F415xx/17xx

1. V and V must be connected to V
DDA SSA
116/1731
voltage when the main V
BAT
and V , respectively.
DD SS
DocID018909 Rev 11
). An embedded linear
DD
supply is powered off.
DD
RM0090