ST STM32L4 5 Series - Figure 9. Power Supply Overview; Independent Analog Peripherals Supply

DocID024597 Rev 5 151/1830
RM0351 Power control (PWR)
198
–V
REF+
around 2.5 V. This requires V
DDA
equal to or higher than 2.8 V.
VREF- and VREF+ pins are not available on all packages. When not available on the
package, they are bonded to VSSA and VDDA, respectively.
When the VREF+ is double-bonded with VDDA in a package, the internal voltage
reference buffer is not available and must be kept disable (refer to related device
datasheet for packages pinout description).
V
REF-
must always be equal to V
SSA
.
An embedded linear voltage regulator is used to supply the internal digital power V
CORE
.
V
CORE
is the power supply for digital peripherals and memories.
Figure 9. Power supply overview
5.1.1 Independent analog peripherals supply
To improve ADC and DAC conversion accuracy and to extend the supply flexibility, the
analog peripherals have an independent power supply which can be separately filtered and
shielded from noise on the PCB.
• The analog peripherals voltage supply input is available on a separate V
DDA
pin.
• An isolated supply ground connection is provided on V
SSA
pin.
069
9
''$
GRPDLQ
%DFNXSGRPDLQ
'$FRQYHUWHUV
$'FRQYHUWHUV
6WDQGE\FLUFXLWU\
:DNHXSORJLF
,:'*
9ROWDJHUHJXODWRU
/RZYROWDJHGHWHFWRU
/6(FU\VWDO.RVF
%.3UHJLVWHUV
5&&%'&5UHJLVWHU
57&
FRPSDUDWRUV
RSHUDWLRQDODPSOLILHUV
9ROWDJHUHIHUHQFHEXIIHU
,2ULQJ
9
&25(
GRPDLQ
7HPSVHQVRU
5HVHWEORFN
3//+6,06,
/&'
9
/&'
86%WUDQVFHLYHUV
9
''86%
9
'',2
9
'',2
,2ULQJ
3*>@
9
'',2
9
''$
9
66$
9
66
9
66
9
'',2
GRPDLQ
9
''
GRPDLQ
9
&25(
9
66
9
''
9
%$7
&RUH
'LJLWDO
SHULSKHUDOV
0HPRULHV
9
''