ST STM32L4+ Series Reference Manual page 182

Power control (PWR)
5 Power control (PWR)
5.1 Power supplies
The STM32L4+ Series devices require a 1.71 V to 3.6 V operating supply voltage (V
Several peripherals are supplied through independent power domains: V
V , V
DDUSB
the V
DD
• V
DD
V
DD
analog such as reset, power management and internal clocks. It is provided externally
through VDD pins.
•
V
DDA
V
DDA
reference buffer, operational amplifiers and comparators. The V
independent from the V
these peripherals are not used.
•
V
DD12
V
DD12
an external SMPS. It is provided externally through V
packages with the external SMPS supply option. V
decoupling capacitance and cannot support any external load.
•
V
DDUSB
V
DDUSB
voltage level is independent from the V
connected to V
The V
bonded to V
the USB is used.
•
V
DDIO2
V
DDIO2
is independent from the V
PG[15:2] are not used.
• V
DDDSI
MIPI DPHY. This supply must be connected to the global V
•
V
CAPDSI
externally to V
•
V
DD12DSI
pins. An external capacitor of 2.2 uF must be connected on V
• V
BAT
V
BAT
(through power switch) when V
small packages without dedicated pin.
•
V
REF-
V
REF+
internal voltage reference buffer when enabled.
182/2301
. Those supplies must not be provided without a valid operating supply on
DDDSI
pin.
= 1.71 V to 3.6 V
is the external power supply for the I/Os, the internal regulator and the system
= 1.62 V (ADCs/COMPs) / 1.8 V (DACs/OPAMPs) / 2.4 V (VREFBUF) to 3.6 V
is the external analog power supply for A/D converters, D/A converters, voltage
DD
= 1.05 to 1.32 V
is the external power supply bypassing the internal regulator when connected to
= 3.0 V to 3.6 V
is the external independent power supply for USB transceivers. The V
when the USB is not used.
DD
power supply may not be present as a dedicated pin, but to be internally
DDUSB
. For such devices, V
DD
= 1.08 V to 3.6 V
is the external power supply for 14 I/Os (Port G[15:2]). The V
is an independent DSI power supply dedicated to the DSI regulator and the
pin is the output of the DSI regulator (1.2 V) which must be connected
.
DD12DSI
pin is used to supply the MIPI D-PHY, and to supply the clock and data lanes
= 1.55 V to 3.6 V
is the power supply for RTC, external clock 32 kHz oscillator and backup registers
, V
REF+
is the input reference voltage for ADCs and DACs. It is also the output of the
voltage. V should be preferably connected to V
DDA
voltage. V
DD
has to respect the V
DD
voltage and should preferably be connected to V
DD
is not present. VBAT is internally bonded to VDD for
DD
RM0432 Rev 6
, V
DDA
voltage level is
DDA
pins and only available on
DD12
does not require any external
DD12
should be preferably
DDUSB
supply range when
DDUSB
DDIO2
.
DD
pin.
DD12DSI
RM0432
).
DD
,
DDIO2
when
DD
DDUSB
voltage level
when
DD