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RM0090: Reference manual - STMicroelectronics

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<strong>RM0090</strong> Power control (PWR)<br />

5 Power control (PWR)<br />

This section applies to the whole STM32F4xx family, unless otherwise specified.<br />

5.1 Power supplies<br />

The device requires a 1.8-to-3.6 V operating voltage supply (VDD ). An embedded linear<br />

voltage regulator is used to supply the internal 1.2 V digital power.<br />

The real-time clock (RTC), the RTC backup registers, and the backup SRAM (BKP SRAM)<br />

can be powered from the VBAT voltage when the main VDD supply is powered off.<br />

Note: Depending on the operating power supply range, some peripheral may be used with limited<br />

functionality and performance. For more details refer to section "General operating<br />

conditions" in STM32F4xx datasheets.<br />

Doc ID 018909 Rev 3 90/1416

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