Datasheet

STM32F405xx, STM32F407xx Electrical characteristics
Doc ID 022152 Rev 2 77/167
Figure 25. Typical V
BAT
current consumption (LSE and RTC ON/backup RAM OFF)
Table 22. Typical and maximum current consumptions in V
BAT
mode
(1)
Symbol Parameter Conditions
Typ Max
Unit
T
A
= 25 °C T
A
= 85 °C
T
A
=
105 °C
V
BAT
=
1.8 V
V
BAT
=
2.4 V
V
BAT
=
3.3 V
V
BAT
= 3.6 V
I
DD_VBAT
Backup
domain supply
current
Backup SRAM ON, low-speed
oscillator and RTC ON
1.29 1.42 1.68 TBD
(2)
TBD
(2)
µA
Backup SRAM OFF, low-speed
oscillator and RTC ON
0.62 0.73 0.96 TBD
(2)
TBD
(2)
Backup SRAM ON, RTC OFF 0.79 0.81 0.86 9
(2)
16
(2)
Backup SRAM OFF, RTC OFF 0.10 0.10 0.10 5
(2)
7
(2)
1. TBD stands for “to be defined”.
2. Based on characterization, not tested in production.
-36
0
0.5
1
1.5
2
2.5
3
3.5
0 102030405060708090100
IVBAT in (μA)
Te mp e ra t u r e i n (° C )
1.65V
1.8V
2V
2.4V
2.7V
3V
3.3V
3.6V