STM32F405 datasheet(84/204 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F405xx, STM32F407xx

84/203

DS8626 Rev 9

5.3.6

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 22: Current consumption

measurement scheme.

All Run mode current consumption measurements given in this section are performed using

a CoreMark-compliant code.

Typical and maximum current consumption

The MCU is placed under the following conditions:

•

At startup, all I/O pins are configured as analog inputs by firmware.

•

All peripherals are disabled except if it is explicitly mentioned.

•

The Flash memory access time is adjusted to fHCLK frequency (0 wait state from 0 to

30 MHz, 1 wait state from 30 to 60 MHz, 2 wait states from 60 to 90 MHz, 3 wait states

from 90 to 120 MHz, 4 wait states from 120 to 150 MHz, and 5 wait states from 150 to

168 MHz).

•

When the peripherals are enabled HCLK is the system clock, fPCLK1 = fHCLK/4, and

fPCLK2 = fHCLK/2, except is explicitly mentioned.

•

The maximum values are obtained for VDD = 3.6 V and maximum ambient temperature

(TA), and the typical values for TA= 25 °C and VDD = 3.3 V unless otherwise specified.

VBOR2

Brownout level 2

threshold

Falling edge

2.44

2.50

2.56

Rising edge

2.53

2.59

2.63

VBOR3

Brownout level 3

threshold

Falling edge

2.75

2.83

2.88

Rising edge

2.85

2.92

2.97

VBORhyst(1)

BOR hysteresis

100

TRSTTEMPO(1)(2) Reset temporization

0.5

1.5

3.0

IRUSH(1)

InRush current on

voltage regulator

power-on (POR or

wakeup from Standby)

160

200

ERUSH(1)

InRush energy on

voltage regulator

power-on (POR or

wakeup from Standby)

VDD = 1.8 V, TA = 105 °C,

IRUSH = 171 mA for 31 µs

5.4

µC

1. Guaranteed by design.

2. The reset temporization is measured from the power-on (POR reset or wakeup from VBAT) to the instant

when first instruction is read by the user application code.

Table 19. Embedded reset and power control block characteristics (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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