L9305 datasheet(41/107 Pages) STMICROELECTRONICS

41 / 107 page

As stated previously, a fault will disable the associated channel and it must be re-enabled by the user. Solenoid

ground loss faults do not disable fail safe and are cleared on SPI read.

8.1.6

Power supply monitoring and diagnostics electrical characteristics

4.75 V ≤ VDD ≤ 5.5 V; 5.5 V ≤ VBATP ≤ 19 V; -40 °C ≤ Tj ≤ 175 °C unless otherwise noted. All voltages refer to

GNDA pin.

Table 29. Power supply monitoring electrical performance

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

VDD_UV

VDD under voltage detection

–

3.6

–

3.9

VDD

VDD_UV_hyst

VDD under voltage

hysteresis

–

VDD_UV+0.1

–

VDD_UV+0.5

VDD

VDD_UV_deglitch

Digital filter time

Guaranteed by scan

–

µs

VDD

VDD_OV

VDD over voltage detection

–

5.5

–

VDD

VDD_OV_hyst

VDD over voltage hysteresis

–

VDD_OV-0.1

–

VDD_OV-0.5

VDD

VDD_OV_deglitch

Digital filter time

Guaranteed by scan

–

120

µs

VDD

VBATP_OV(1)

VBATP over voltage

detection

–

VBATP

VBATP_OV_hyst

VBATP over voltage

hysteresis

–

VBATP_OV-1

–

VBATP_OV-3

VBATP

VBATP_OV_deglitch

Digital filter time

Guaranteed by scan

–

120

µs

VBATP

CP_UV

Charge Pump under voltage

detection

–

VBATP+5

–

CP_UV_deglitch

Charge Pump Under Voltage

Filter time

Guaranteed by scan

–

µs

V3V3A_uv

Internal Analog supply under

voltage monitor

Design info, not tested

2.6

–

V3V3A

V3V3A_uv_hys

Internal Analog supply under

voltage hysteresis

–

V3V3A_uv +0.1

–

V3V3A_uv +0.5

V3V3A

V3V3A_ov

Internal Analog supply over

voltage monitor

Design info, not tested

3.6

–

4.6

V3V3A

V3V3A_ov_hys

Internal Analog supply over

voltage hysteresis

–

V3V3A_ov -0.1

–

V3V3A_ov -0.5

V3V3A

V3V3D_uv

Internal Digital supply under

voltage monitor

Design info, not tested

2.6

–

V3V3D

V3V3D_uv_hys

Internal Digital supply under

voltage hysteresis

–

V3V3D_uv +0.1

–

V3V3D_uv +0.5

V3V3D

V3V3D_ov

Internal Digital supply over

voltage monitor

Design info, not tested

3.6

–

4.6

V3V3D

V3V3D_ov_hys

Internal Digital supply over

voltage hysteresis

–

V3V3D_ov -0.1

–

V3V3D_ov -0.5

V3V3D

GNDA_lost

Analog ground lost detection

Design info, not tested

0.1

–

0.6

GNDA

GNDA_lost_deglitch

GNDA deglitch

Guaranteed by scan

–

µs

GNDA

GNDD_lost

Digital ground lost detection

Design info, not tested

0.1

–

0.6

GNDD

GNDD_lost_deglitch

GNDD deglitch

Guaranteed by scan

–

µs

GNDD

GND_SOLx_lost

Power ground lost detection

Design info, not tested

0.3

–

GND_SOLx

GND_SOLx_lost_deglitch Power ground deglitch

Guaranteed by scan

–

µs

GND_SOLx

1. LS clamp circuitry automatically disabled, see Section 6.4.3

L9305

Safety features

DS12774 - Rev 10

page 41/107

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