STM32L021D4 datasheet(60/114 Pages) STMICROELECTRONICS

60 / 114 page

Electrical characteristics

STM32L021x4

60/114

DocID027982 Rev 5

On-chip peripheral current consumption

The current consumption of the on-chip peripherals is given in the following tables. The

MCU is placed under the following conditions:

•

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

•

all peripherals are disabled unless otherwise mentioned

•

the given value is calculated by measuring the current consumption

–

with all peripherals clocked OFF

–

with only one peripheral clocked ON

Table 29. Typical and maximum current consumptions in Standby mode

Symbol

Parameter

Conditions

Typ

Max(1)

Unit

IDD

(Standby)

Supply current in Standby

mode

Independent watchdog

and LSI enabled

TA = -40 °C to 25 °C

0.8

1.6

µA

TA = 55 °C

0.9

1.8

TA= 85 °C

TA = 105 °C

1.25

TA = 125 °C

Independent watchdog

and LSI OFF

TA = -40 °C to 25 °C

0.23

0.6

TA = 55 °C

0.25

0.7

TA = 85 °C

0.36

TA = 105 °C

0.62

1.7

TA = 125 °C

1.35

1. Guaranteed by characterization results at 125 °C, not tested in production, unless otherwise specified

Table 30. Average current consumption during wakeup

Symbol

parameter

System frequency

Current

consumption

during wakeup

Unit

IDD (WU from

Stop)

Supply current during wakeup from

Stop mode

HSI

HSI/4

0,7

MSI 4,2 MHz

0,7

MSI 1,05 MHz

0,4

MSI 65 KHz

0,1

IDD (Reset)

Reset pin pulled down

0,21

IDD (Power Up)

BOR ON

0,23

IDD (WU from

StandBy)

With Fast wakeup set

MSI 2,1 MHz

0,5

With Fast wakeup disabled

MSI 2,1 MHz

0,12

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