Datasheet

Functional overview STM32L496xx
24/272 DS11585 Rev 9
Figure 3. Power supply overview
During power-up and power-down phases, the following power sequence requirements
must be respected:
• When V
DD
is below 1 V, other power supplies (V
DDA
, V
DDUSB
, V
DDIO2
, V
LCD
must
remain below V
DD
+ 300 mV.
• When V
DD
is above 1 V, all power supplies are independent.
During the power-down phase, V
DD
can temporarily become lower than other supplies only
if the energy provided to the MCU remains below 1
mJ; this allows external decoupling
capacitors to be discharged with different time constants during the power-down transient
phase.
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