Note: VDDSMPS, VLXSMPS, VFBSMPS and VSSSMPS are available only on STM32H725/735 and STM32H730
devices.
Note: On STM32H723/733, VDDLDO is not available on a pin/ball. It is internally connected to VDD.
Table 1. PWR input/output signals connected to package pins/balls
Pin name Signal type Description
VDD Supply input
Main I/O and V
DD
domain supply input.
VSS Supply input Main ground.
VDDA Supply input External analog power supply for analog peripherals.
VSSA Supply input Separated isolated ground for analog peripherals.
VBAT Supply input/output
Backup battery supply: optional external supply for backup domain when V
DD
is not
present. Can also be used to charge the external battery.
VDDSMPS Supply input Supply for switch mode power supply (SMPS) step-down converter.
VLXSMPS Supply output SMPS step-down converter output.
VFBSMPS Supply regulation input SMPS feedback voltage sense.
VSSSMPS Supply input Ground for SMPS step-down converter.
VDDLDO Supply input Supply for the integrated low drop out regulator.
VCAP Supply input/output
Figure 2. System supply configuration shows the different possible regulator supply
configurations: using one, both or none.
Digital Core supply input / output pin. Is either provided by the embedded regulator or
from an external source.
(1)
VDD50USB Supply input Supply for USB regulator.
VDD33USB Supply input/output
Embedded USB regulator output or external USB supply when the internal regulator is
not used.
VREF+ Supply input/output
Reference voltage for ADCs and DACs. Can be generated through the internal
VREFBUF or provided by an external source.
VREF- Supply input Ground reference for ADCs and DACs.
PDR_ON Digital input Control signal to switch the integrated POR/PDR circuitry ON/OFF.
1. Refer to Figure 2. System supply configuration for the different possible configurations
AN5419
Introduction
AN5419 - Rev 2
page 5/50
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