STM32WB55CGU6ATR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32WB55CGU6ATR

Multiprotocol wireless 32-bit MCU Arm®-based Cortex®-M4 with FPU, Bluetooth® 5 and 802.15.4 radio solution

STMicroelectronics 

STM32WB55xx STM32WB35xx

Electrical characteristics

Table 83. VREFBUF characteristics(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Iline_reg

Line regulation

2.8 V ≤ VDDA ≤ 3.6 V

Iload = 500 µA

Iload = 4 mA

-

-

Iload_reg Load regulation 500 μA ≤ Iload ≤4 mA Normal mode

-

-40 °C < TJ < +125 °C

-

TCoeff

Temperature

coefficient

0 °C < TJ < +50 °C

-

200 1000

ppm/V

100

500

50

500 ppm/mA

Tcoeff_

-

vrefint +

50

ppm/ °C

Tcoeff_

-

vrefint +

50

PSRR

tSTART

Power supply

rejection

Start-up time

DC

100 kHz

CL = 0.5 µF(4)

CL = 1.1 µF(4)

CL = 1.5 µF(4)

40

60

-

dB

25

40

-

-

300

350

-

500

650

µs

-

650

800

Control of

maximum DC

IINRUSH

current drive on

VREFBUF_OUT

-

during start-up

phase (5)

-

-

8

-

mA

IDDA

(VREFBUF)

VREFBUF

consumption

from VDDA

Iload = 0 µA

Iload = 500 µA

Iload = 4 mA

-

16

25

-

18

30

µA

-

35

50

1. Guaranteed by design, unless otherwise specified.

2.

In degraded

voltage).

mode,

the

voltage

reference

buffer

cannot

maintain

accurately

the

output

voltage

that

will

follow

(VDDA

-

drop

3. Guaranteed by test in production.

4. The capacitive load must include a 100 nF capacitor in order to cut-off the high frequency noise.

5.

To correctly control

the range [2.4 V to

the

3.6

VREFBUF

V] and [2.8

in-rush current during start-up phase and scaling

V to 3.6 V] respectively for VRS = 0 and VRS = 1.

change,

the

VDDA

voltage

must

be

in

DS11929 Rev 10

153/193

169

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