STM32MP157A datasheet(133/259 Pages) STMICROELECTRONICS

133 / 259 page

DS12504 Rev 5

133/259

STM32MP157A/D

Electrical characteristics

237

6.3.5

Embedded regulators characteristics

The parameters given in Table 18, Table 19, Table 20 are derived from tests performed

under ambient temperature and VDD supply voltage conditions summarized in Table 13:

General operating conditions.

REG1V1 embedded regulator (USB_PHY)

ΔVREFINT(2)

Internal reference voltage

spread over the temperature

range

-40 °C < TJ < 125 °C

4.3

Tcoeff_VREFINT

Average temperature

coefficient

Average temperature

coefficient

-19

ppm/°C

VDDcoeff

Average Voltage coefficient

3.0 V < VDD < 3.6 V

1370

ppm/V

The shortest sampling time for the application can be determined by multiple iterations.

Guaranteed by design.

Table 16. Embedded reference voltage (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 17. Embedded reference voltage calibration value

Symbol

Parameter

Memory address

VREFIN_CAL

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

0x5C00 5250[31:16](1)(2)

1. Mandatory to read in 32-bits word and do relevant mask and shift to isolate required bits.

2. These address is inside BSEC which should be enabled in RCC to allow access.

Table 18. REG1V1 embedded regulator (USB_PHY) characteristics(1)

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VDDA1V1_

REG

Regulated output voltage

1.045

1.1

1.155

Load Capacitor

1.1

2.2(2)

3.3

µF

esr

Equivalent Serial Resistor of Cload

0.1

600

mΩ

Iload

Static load current(3)

tSTART

Start-up time. from

PWR_CR3.REG11EN = 1 to

PWR_CR3.REG11RDY = 1

CL=2.2uF

µs

CL=3.3uF

180

IINRUSH

VDD Inrush Current to load external

capacitor at start

IVDD

Regulator Current consumption on

VDD

Regulator Enabled and Iload =

0 mA

150

205

µA

Regulator Enabled and Iload =

30 mA

176

242

1. Guaranteed by design.

2. For better dynamic performances a 2.2 μF typical value external capacitor is recommended.

3. Load is for internal STM32MP157A/D analog blocks, no additional external load is accepted unless mentioned.

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