STM32U375CE datasheet(155/222 Pages) STMICROELECTRONICS

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5.3.23

Voltage reference buffer characteristics

Table 104. VREFBUF characteristics

Specified by design and not tested in production, unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDDA

Analog supply voltage

Normal mode

VRS = 000

1.8

3.6

VRS = 001

2.1

VRS = 010

2.4

VRS = 011

2.8

Degraded mode(1)

VRS = 000

1.62

1.8

VRS = 001

2.1

VRS = 010

2.4

VRS = 011

2.8

VREFBUF_OUT(2)

Voltage reference buffer

output

Normal mode at

VDDA = 3 V, TJ = 30 °C,

Iload = 10 µA

VRS = 000

1.496

1.5

1.504

VRS = 001

1.795

1.8

1.805

VRS = 010

2.042

2.048

2.054

VRS = 011

2.493

2.5

2.507

Degraded mode(1)

VRS = 000

Min (VDDA -

0.15; 1.496)

1.504

VRS = 001

Min (VDDA -

0.15; 1.795)

1.805

VRS = 010

Min (VDDA -

0.15; 2.042)

2.054

VRS = 011

Min (VDDA -

0.15; 2.493)

2.507

TRIM

Trim step

0.1

0.175

0.25

Load capacitor(3)

0.5

1.10

1.50

µF

esr

CL equivalent serial resistor

Ω

Iload

Static load current

RPD

Pull-down resistance

400

Ω

Iline_reg

Line regulation

VDDAmin ≤ VDDA ≤ 3.6 V,

Normal mode,

500 µA ≤ Iload ≤ 4 mA

± 0.016

± 0.033

± 0.053

Iload_reg

Load regulation(4)

Normal mode,

500 μA ≤ Iload ≤ 4 mA

400

ppm/mA

TCoeff

Temperature coefficient

–40 ° C < TJ < +110 ° C

Tcoeff_vrefint +

ppm/°C

PSRR

Power supply rejection

100 kHz

tSTART

Startup time

CL = 0.5 µF

110

200

µs

CL = 1.1 µF

240

350

CL = 1.5 µF

320

500

IINRUSH

Control of DC current drive on

VREFBUF_OUT(5) during startup

phase

STM32U375xx

Electrical characteristics

DS14861 - Rev 2

page 155/222

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