Power Supply And Power Selection; External Power Supply Input; Table 8. Power Sources Capability - ST STM32U5 User Manual

6.4

Power supply and power selection

6.4.1

External power supply input

It is possible to configure the STM32U5 Nucleo-144 board to use any of the following power sources:
• 5V_STLK from STLINK-V3E USB connector (CN1)
• VIN (7 to 12 V) from ARDUINO
adaptation from LDO (U11)
• 5V_EXT from ST morpho connector (CN11)
• 5V_USB_C from USB Type-C
• 5V_CHGR from STLINK-V3E USB connector (CN1)
• 3V3 from ARDUINO
If VIN, 5V_EXT, or 3V3 is used to power the STM32U5 Nucleo-144 board, this power source must comply
with the standard EN‑60950‑1: 2006+A11/2009 and must be safety extra‑low voltage (SELV) with limited power
capability.
The power supply capabilities are summarized in
Input Power name
5V_STLK
VIN / 5V_VIN
5V_EXT
5V_USB_C
5V_CHGR
3V3
VDD
UM2861 - Rev 5
®
-included Zio connector (CN8) or ST morpho connector (CN11) with 5 V
®
connector (CN15)
®
-included Zio connector (CN8) or ST morpho connector (CN11)
Table 8. Power sources capability
Connector pins Voltage range
CN1 pin 1
4.75 to 5.5 V
JP6 [1-2]
CN8 pin 15
CN11 pin 24 7 to 12 V
JP6 [3-4]
CN11 pin 6
4.75 to 5.5 V
JP6 [5-6]
CN15
4.75 to 5.5 V
JP6 [7-8]
CN1 pin 1
4.75 to 5.5 V
JP6 [9-10]
CN8 pin 7
CN11 pin 16 3.0 to 3.6 V
JP5 pin 2
JP4 pin 2 1.71 to 3.6 V
Table 8.
Max.
current
The maximum current depends on the presence or
absence of USB enumeration:
500 mA
• 100 mA without enumeration
• 500 mA with enumeration OK
From 7 to 12 V only and input current capability is
linked to input voltage:
800 mA
• 800 mA input current when VIN = 7 V
• 450 mA input current when 7 V < VIN < 9 V
• 250 mA input current when 9 V < VIN < 12 V
The maximum current depends on the power
500 mA
source.
The maximum current depends on the USB host
1 A
used to power the Nucleo.
The maximum current depends on the USB wall
500 mA charger used to power the Nucleo. There is no
USB enumeration.
The maximum current depends on the 3V3 source.
The 3V3 can be used when the STLINK-V3E part
-
of the PCB is not used. SB1 must be OFF to
protect LDO (U10).
It is possible to power only the MCU power
supplies pins by applying a voltage source on JP4
pin 2. In this case, only the MCU is powered.
External functions like debugging, LED, or the
expansion connector are not powered. This option
can be used for the MCU power consumption
measurement.
UM2861
Power supply and power selection
Limitation
page 16/49