Datasheet
Electrical characteristics STM32L431xx
94/200 DocID028800 Rev 1
Table 32. Current consumption in Low-power sleep modes, Flash in power-down
Symbol Parameter
Conditions TYP MAX
(1)
Unit
-
Voltage
scaling
f
HCLK
25 °C 55 °C 85 °C 105 °C 125 °C 25 °C 55 °C 85 °C 105 °C 125 °C
I
DD
(LPSleep
)
Supply current
in low-power
sleep mode
f
HCLK
= f
MSI
all peripherals disable
2 MHz 58.7 70.7 103.2 153.7 248.5 80 113 180 330 641
µA
1 MHz 39.4 47.2 79.3 129.6 224.8 53 86 154 304 616
400 kHz 20.8 30.8 62.1 112.5 207.8 35 67 137 286 597
100 kHz 14.3 23.1 55.1 105.7 201.5 27 58 130 279 590
1. Guaranteed by characterization results, unless otherwise specified.
Table 33. Current consumption in Stop 2 mode
Symbol Parameter
Conditions TYP MAX
(1)
Unit
-V
DD
25 °C 55 °C 85 °C 105 °C 125 °C 25 °C 55 °C 85 °C 105 °C 125 °C
I
DD
(Stop 2)
Supply current in
Stop 2 mode,
RTC disabled
-
1.8 V 1 2.54 8.74 19.8 43.4 2.0 5.6 21.1 50.8 116.0
µA
2.4 V 1.02 2.59 8.89 20.2 44.3 2.1 5.8 21.6 52.3 119.6
3 V 1.06 2.67 9.11 20.7 45.5 2.1 5.9 22.2 53.7 123.2
3.6 V 1.23 2.88 9.56 21.6 47.3 2.3 6.1 23.0 55.8 127.9
I
DD
(Stop 2
with RTC)
Supply current in
Stop 2 mode,
RTC enabled
RTC clocked by LSI
1.8 V 1.3 2.82 9.02 20.1 43.6 2.5 6.2 21.6 51.3 116.3
µA
2.4 V 1.39 2.95 9.24 20.5 44.6 2.8 6.4 22.3 52.8 120.0
3 V 1.5 3.11 9.55 21.1 45.8 3.0 6.8 23.0 54.5 123.8
3.6 V 1.76 3.42 10.1 22.1 47.8 3.3 7.2 24.1 56.7 128.7
RTC clocked by LSE
bypassed at 32768 Hz
1.8 V 1.36 2.9 9.1 20.1 43.7 - - - - -
2.4 V 1.48 3.09 9.44 20.8 45 - - - - -
3 V 1.83 3.67 10.4 22.3 47.3 - - - - -
3.6 V 3.58 6.17 13.9 26.6 53 - - - - -
RTC clocked by LSE
quartz
(2)
in low drive mode
1.8 V 1.28 2.81 9.13 20.8 - - - - - -
2.4 V 1.39 2.93 9.34 21.3 - - - - - -
3 V 1.59 3.1 9.64 21.8 - - - - - -
3.6 V 1.86 3.45 10.2 22.8 - - - - - -
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