STM32L151VD datasheet(60/140 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L151xD STM32L152xD

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Doc ID 022027 Rev 6

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 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.

Maximum current consumption

The MCU is placed under the following conditions:

●

VDD = 3.6 V

●

All I/O pins are in input mode with a static value at VDD or VSS (no load)

●

All peripherals are disabled except when explicitly mentioned

●

The Flash memory access time is adjusted depending on fHCLK frequency and voltage

range

●

Prefetch and 64-bit access are enabled in configurations with 1 wait state

The parameters given in Table 17, Table 14 and Table 15 are derived from tests performed

under ambient temperature and VDD supply voltage conditions summarized in Table 14.

Table 17.

Current consumption in Run mode, code with data processing running from Flash

Symbol

Parameter

Conditions

fHCLK

Typ

Max(1)

Unit

55 °C 85 °C 105 °C

IDD

(Run

from

Flash)

Supply

current in

Run mode,

code

executed

from Flash

fHSE = fHCLK up to

16 MHz included,

fHSE = fHCLK/2

above 16 MHz (PLL

ON)(2)

Range 3,

VCORE=1.2 V

VOS[1:0] = 11

1 MHz

360

500

µA

2 MHz

620

750

4 MHz

1070

1200

Range 2,

VCORE=1.5 V

VOS[1:0] = 10

4 MHz

1.30

1.6

8 MHz

2.4

2.9

16 MHz

4.6

5.2

Range 1,

VCORE=1.8 V

VOS[1:0] = 01

8 MHz

2.9

3.5

16 MHz

5.7

6.5

32 MHz

10.4

HSI clock source

(16 MHz)

Range 2,

VCORE=1.5 V

VOS[1:0] = 10

16 MHz

4.5

5.2

Range 1,

VCORE=1.8 V

VOS[1:0] = 01

32 MHz

10.9

12.3

MSI clock, 65 kHz

Range 3,

VCORE=1.2 V

VOS[1:0] = 11

65 kHz

0.05

0.079 0.092

0.13

MSI clock, 524 kHz

524 kHz

0.17

0.2

0.21

0.25

MSI clock, 4.2 MHz

4.2 MHz

1.0

1.1

1.2

Based on characterization, not tested in production, unless otherwise specified.

Oscillator bypassed (HSEBYP = 1 in RCC_CR register).

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