STM32L552CEU6QTR datasheet(32/340 Pages) STMICROELECTRONICS

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.

STM32L552CEU6QTR 数据表(PDF) 32 Page - STMicroelectronics

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