Figure 7. Power Supply Scheme For U535/545/575/585Xxxxq (With Smps) - ST STM32U5 Getting Started

AN5373 - Rev 6
Figure 7. Power supply scheme for U535/545/575/585xxxxQ (with SMPS)
VBAT
1.65 – 3.6 V
3.3 V
VDDUSB
100 nF
V
DD
VDDSMPS
10 µF
VLXSMPS
2.2 µH
2 x VDD11
2 x 2.2 µF
VSSSMPS
V
DD
n x VDD
n x 100 nF
GPIOs
+ 10 µF
n x VSS
V
DDIO2
m x VDDIO2
m x100 nF
+ 4.7 µF
GPIOs
m x VSS
V
DDA
VDDA
V
REF
100 nF
+ 1 µF
100 nF+ 1 µF
VSSA
Power switch
Voltage regulator
SMPS
SMPS ON
SMPS OFF
LDO
V
DDIO1
OUT
IN
V
DDIO2
OUT
IN
ADCs/
DACs/
V
REF+
OPAMPs/
V
REF-
COMPs/
VREFBUF
AN5373
Power supply schemes
Backup circuitry
(LSE, RTC, TAMP,
backup registers,
backup SRAM)
V
CORE
Kernel logic
(CPU, digital
and memories)
IO
logic
IO
logic
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