STM32H7B3AI datasheet(93/238 Pages) STMICROELECTRONICS

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Table 31. Internal reference voltage calibration values

Symbol

Parameter

Memory address

VREFIN_CAL

Raw data acquired at temperature of 30 °C, VDDA = 3.3 V

08FFF810 - 08FFF812

Table 32. USB regulator characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDD50USB

Supply voltage

5,5

IDD50USB

Current consumption

13.5

µA

VREGOUTV33V

Regulated output voltage

3.6

IOUT

Output current load sinked by USB block

TWKUP

Wakeup time

120

170

µs

6.3.7

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 the run-mode current consumption measurements given in this section are performed with a CoreMark code.

Typical and maximum current consumption

The MCU is placed under the following conditions:

•

All I/O pins are in analog input mode.

•

All peripherals are disabled except when explicitly mentioned.

•

The flash memory access time is adjusted with the minimum wait states number, depending on the fACLK

frequency (refer to the table “Number of wait states according to CPU clock (frcc_cpu_ck) frequency and

VCORE range” available in the reference manual).

•

When the peripherals are enabled, the AHB clock frequency is the CPU frequency divided by 2 and the APB

clock frequency is AHB clock frequency divided by 2.

The parameters given in the below tables are derived from tests performed under the supply voltage conditions

summarized in Table 22. General operating conditions and unless otherwise specified at ambient temperature.

The maximum current consumptions provided in the following tables are given for LDO regulator ON. To obtain

the maximum SMPS current consumption, the efficiency curves can be used with the maximum LDO current

consumption as entry value (refer to Section 6.3.3 SMPS step-down converter).

STM32H7B3xI

Operating conditions

DS13139 - Rev 8

page 93/238

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