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STM32L552CCI3PTR Folha de dados(PDF) 32 Page - STMicroelectronics |
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STM32L552CCI3PTR Folha de dados(HTML) 32 Page - STMicroelectronics |
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32 / 340 page  Functional overview STM32L552xx 32/340 DS12737 Rev 6 3.9 Power supply management The power controller (PWR) main features are: • Power supplies and supply domains – Core domains (VCORE) – VDD domain – Backup domain (VBAT) – Analog domain (VDDA) – VDDIO2 domain – VDDUSB for USB transceiver • System supply voltage regulation – SMPS step down converter – Voltage regulator (LDO) • Power supply supervision – POR/PDR monitor – BOR monitor –PVD monitor – PVM monitor (VDDA, VDDUSB, VDDIO2) – Temperature thresholds monitor – Upper VDD voltage threshold monitor • Power management – Operating modes – Voltage scaling control – Low-power modes • VBAT battery charging • TrustZone security 3.9.1 Power supply schemes The devices require a 1.71 V to 3.6 V VDD operating voltage supply. Several independent supplies can be provided for specific peripherals: • VDD = 1.71 V to 3.6 V VDD is the external power supply for the I/Os, the internal regulator and the system analog such as reset, power management and internal clocks. It is provided externally through the VDD pins. • VDDA = 1.62 V (ADCs/COMPs) / 1.8 V (DACs/OPAMPs) to 2.4 V (VREFBUF) to 3.6 V VDDA is the external analog power supply for A/D converters, D/A converters, voltage reference buffer, operational amplifiers and comparators. The VDDA voltage level is independent from the VDD voltage and should preferably be connected to VDD when these peripherals are not used. |
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