Datasheet

Electrical characteristics STM32F446xC/E
96/202 DocID027107 Rev 6
I/O system current consumption
The current consumption of the I/O system has two components: static and
dynamic.
I/O static current consumption
All the I/Os used as inputs with pull-up generate current consumption when the pin is
externally held low. The value of this current consumption can be simply computed by using
the pull-up/pull-down resistors values given in
Table 56: I/O static characteristics.
For the output pins, any external pull-down or external load must also be considered to
estimate the current consumption.
Additional I/O current consumption is due to I/Os configured as inputs if an intermediate
voltage level is externally applied. This current consumption is caused by the input Schmitt
trigger circuits used to discriminate the input value. Unless this specific configuration is
required by the application, this supply current consumption can be avoided by configuring
these I/Os in analog mode. This is notably the case of ADC input pins which should be
configured as analog inputs.
Table 33. Typical current consumption in Sleep mode, regulator OFF
(1)
Symbol Parameter Conditions f
HCLK
(MHz)
VDD=3.3 V VDD=1.7 V Unit
I
DD12
I
DD
I
DD12
I
DD
-
I
DD12
/I
DD
Supply current
in Sleep mode
from V
12
and
V
DD
supply
All Peripherals
enabled
180 47.605 1.2 NA NA
mA
168 44.35 1.0 41.53 0.8
150 40.58 0.9 39.96 0.8
144 35.68 0.9 34.60 0.7
120 27.30 0.9 29.11 0.7
90 20.69 0.8 19.78 0.6
60 13.88 0.7 13.36 0.6
30 7.66 0.7 7.85 0.6
25 6.49 0.7 6.66 0.5
All Peripherals
disabled
180 8.71 1.2 NA NA
168 7.00 0.9 8.42 0.8
150 6.88 0.9 7.61 0.8
144 6.29 0.9 6.99 0.7
120 4.87 0.9 5.95 0.7
90 3.78 0.8 3.96 0.6
60 2.66 0.7 2.80 0.6
30 1.65 0.7 1.74 0.6
25 1.45 0.7 1.52 0.5
1. When peripherals are enabled, the power consumption corresponding to the analog part of the peripherals (such as ADC,
or DAC) is not included.
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