Datasheet

Electrical characteristics STM32L052x6 STM32L052x8
60/143 DocID025936 Rev 8
6.3.4 Supply current characteristics
The current consumption is a function of several parameters and factors such as the
operating voltage, 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 12: 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 2.1 code if not specified
otherwise.
The current consumption values are derived from the tests performed under ambient
temperature and V
DD
supply voltage conditions summarized in Table 25: General operating
conditions unless otherwise specified.
The MCU is placed under the following conditions:
• All I/O pins are configured in analog input mode
• All peripherals are disabled except when explicitly mentioned
• The Flash memory access time and prefetch is adjusted depending on fHCLK
frequency and voltage range to provide the best CPU performance unless otherwise
specified.
• When the peripherals are enabled f
APB1
= f
APB2
= f
APB
• When PLL is ON, the PLL inputs are equal to HSI = 16 MHz (if internal clock is used) or
HSE = 16 MHz (if HSE bypass mode is used)
• The HSE user clock applied to OSCI_IN input follows the characteristic specified in
Table 42: High-speed external user clock characteristics
• For maximum current consumption V
DD
= V
DDA
= 3.6 V is applied to all supply pins
• For typical current consumption V
DD
= V
DDA
= 3.0 V is applied to all supply pins if not
specified otherwise
The parameters given in Table 50, Table 25 and Table 26 are derived from tests performed
under ambient temperature and V
DD
supply voltage conditions summarized in Table 25.
I
LPBUF
(4)
Consumption of reference
voltage buffer for VREF_OUT
and COMP
- - 730 1200 nA
V
REFINT_DIV1
(4)
1/4 reference voltage - 24 25 26
%
V
REFINT
V
REFINT_DIV2
(4)
1/2 reference voltage - 49 50 51
V
REFINT_DIV3
(4)
3/4 reference voltage - 74 75 76
1. Refer to Table 40: Peripheral current consumption in Stop and Standby mode for the value of the internal reference current
consumption (I
REFINT
).
2. Guaranteed by test in production.
3. The internal V
REF
value is individually measured in production and stored in dedicated EEPROM bytes.
4. Guaranteed by design.
5. Shortest sampling time can be determined in the application by multiple iterations.
6. To guarantee less than 1% VREF_OUT deviation.
Table 28. Embedded internal reference voltage
(1)
(continued)
Symbol Parameter Conditions Min Typ Max Unit
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