DocID026505 Rev 1

5/25

AN4538

STM32F3xx microcontroller low-power overview

24

1

STM32F3xx microcontroller low-power overview

with a high number of integrated advanced analog peripherals. They integrate an efficient

power supply architecture and various power modes that lead to the power consumption

reduction at the application level and simplify the application design.

1.1

Power supply

STM32F3xxxx devices have an optimized power supply architecture to combine real-time

capabilities, digital signal processing, and low-voltage operations with highly integrated

analog peripherals.

There are two different power supply architectures, depending on the availability of the

internal voltage regulator in the STM32F3xx microcontrollers:

1.1.1

STM32F3xxxx device power supply with an internal regulator

The embedded voltage regulator is used to supply the internal 1.8 V digital power domain

that contains the core, the memories and the digital peripherals as described in Figure 1.

Figure 1. Power supply overview in STM32F3xxxx devices with an internal regulator