ST STM32U5

Figure 8. Power supply scheme for STM32U535/545/575/585xx (without SMPS)
DT64358V1
V
DDIO2
V
DD
Level shifter
I/O
logic
Kernel logic
(CPU, digital
and
memories)
Backup circuitry
(LSE, RTC, TAMP
backup registers,
backup SRAM)
IN
OUT
LDO
regulator
GPIOs
1.65 – 3.6 V
IN
OUT
GPIOs
n x 100 nF
+ 1 x 10 µF
m x 100 nF
Level shifter
I/O
logic
+ 4.7 µF
m x VDDIO2
m x VSS
n x VSS
n x VDD
VBAT
V
CORE
Power switch
V
DDIO2
V
DDIO1
ADCs/
DACs/
OPAMPs/
COMPs/
VREFBUF
VREF+
VREF-
V
DDA
100 nF
+1 µF
VDDA
VSSA
V
REF
100 nF
+ 1 µF
V
CORE
4.7 µF
VCAP
VDDUSB
3.3 V
100 nF
Caution: If there are two VCAP pins (UFBGA169 package), each pin must be connected to a 2.2 µF (typical) capacitor
(for a total around 4.4 µF).
AN5373
Power supply schemes
AN5373 - Rev 6
page 15/47