ST STM32G4 Nucleo-32 - Power Supply

6.4 Power supply
Five different sources can provide the power supply:
• A host PC connected to CN1 through a USB cable (default setting)
• An external 5 V USB charger (5V_USB_CHGR) connected to CN1
• An external 7 V - 12 V (VIN) power supply connected to CN3 pin 1
• An external 3.3 V power supply (3V3) connected to CN3 pin 14
• An external 5 V power supply (5V) connected to CN3 pin 4
Figure 8. STM32G4 Nucleo-32 board power tree
STLINK-V3E USB connector (CN1)
ARDUINO
®
Nano
Connector
STM32F723IEK
(STLINK-V3E)
and
bicolor LED LD1 (COM)
DFU connector (CN2)
MCU STM32G4
LDO
LD39050PU33R
3V3
5V
U9
U7
LDO
LD3985M33R
U6
5V_USB_STLK
5V_VIN
LDO
LD1117S50TR
U8
VIN
5V
5V_VIN
3V3
5V_VIN
5V_USB_CHGR
3V3_STLK
AVDD
VDD
3V3
5V
Power switch 5V/0.5A
STMPS2151STR
5V_USB_CHGR
5V_VIN
(VDD)
VDD
SB5 (ON)
JP1
ON
AVDD
(AVDD)
CN4
1
CN3
1
1515
In case VIN, 5V or 3V3 is used to power the STM32G4 Nucleo-32 board, this power source must comply with the
EN-60950-1: 2006+A11/2009 standard and must be Safety Extra Low Voltage (SELV) with limited power
capability.
UM2397
Power supply
UM2397 - Rev 2
page 12/30