Datasheet
DocID022799 Rev 6 61/132
STM32L15xCC STM32L15xRC STM32L15xUC STM32L15xVC Electrical characteristics
111
6.3.4 Supply current characteristics
The current consumption is a function of several parameters and factors such as the
operating voltage, ambient temperature, I/O pin loading, device software configuration,
operating frequencies, I/O pin switching rate, program location in memory and executed
binary code. The current consumption is measured as described in Figure 14: Current
consumption measurement scheme.
All Run-mode current consumption measurements given in this section are performed with a
reduced code that gives a consumption equivalent to Dhrystone code.
Maximum current consumption
The MCU is placed under the following conditions:
V
DD
= 3.6 V
All I/O pins are in input mode with a static value at V
DD
or V
SS
(no load)
All peripherals are disabled except when explicitly mentioned
The Flash memory access time is adjusted depending on f
HCLK
frequency and voltage
range
Prefetch and 64-bit access are enabled in configurations with 1 wait state
When the peripherals are enabled fAPB1 = fAPB2 = fAHB
When fHCLK > 8 MHz PLL is ON and PLL inputs is equal to HSI = 8 MHz (if internal
clock is used) or HSE = 8 MHz (if HSE bypass mode is used)
The parameters given in Table 34, Table 14 and Table 15 are derived from tests performed
under ambient temperature and V
DD
supply voltage conditions summarized in Table 14.
Table 18. Current consumption in Run mode, code with data processing running from Flash
Symbol Parameter Conditions f
HCLK
Typ Max
(1)
Unit
I
DD
(Run
from
Flash)
Supply
current in
Run mode,
code
executed
from Flash
f
HSE
= f
HCLK
up to 16
MHz included, f
HSE
=
f
HCLK
/2 above 16 MHz
(PLL ON)
(2)
Range 3, V
CORE
=1.2 V
VOS[1:0] = 11
1 MHz 285 400
µA2 MHz 490 600
4 MHz 845 960
Range 2, V
CORE
=1.5 V
VOS[1:0] = 10
4 MHz 0.9 1.1
mA
8 MHz 1.8 2.1
16 MHz 3.5 3.9
Range 1, V
CORE
=1.8 V
VOS[1:0] = 01
8 MHz 2.3 2.8
16 MHz 4.3 4.9
32 MHz 8.2 9.4
HSI clock source (16
MHz)
Range 2, V
CORE
=1.5 V
VOS[1:0] = 10
16 MHz 3.6 4
Range 1, V
CORE
=1.8 V
VOS[1:0] = 01
32 MHz 8.4 9.6
MSI clock, 65 kHz
Range 3, V
CORE
=1.2 V
VOS[1:0] = 11
65 kHz 47 110
µAMSI clock, 524 kHz 524 kHz 135 190
MSI clock,
4.2 MHz 4.2 MHz 785 900
1. Based on characterization, not tested in production, unless otherwise specified.