L99DZ120 datasheet(46/161 Pages) STMICROELECTRONICS

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Electrical specifications

L99DZ120

46/161

DS11567 Rev 5

3.4.18

Fail safe low-side switch

The voltages are referred to power ground and currents are assumed positive, when the

current flows into the pin. 6 V ≤ VS ≤ 18 V; Tj = 40 °C to 150 °C, unless otherwise specified.

Table 24. Open-load monitoring external H-bridge

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VODSL

Low-side drain-source monitor low

off-threshold voltage

VSLx = 0 V; VS = 13.5 V

0.15 VS

VODSH

Low-side drain-source monitor high

off-threshold voltage

VSLx = 0 V; VS = 13.5 V

0.85 VS

VOLSHx

Output voltage of selected SHx in

open-load test mode

VSLx = 0 V; VS = 13.5 V

0.5 VS

RpdOL

Pull-down resistance of the non-

selected SHx pin in open-load mode

VSLx = 0 V; VS = 13.5 V;

VSHX = 4.5 V

kΩ

tOL_HB

Open-load filter time

Table 25. Fail safe low-side switch

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VOUT_max

Max output voltage in

case of missing supply

IOUT = 1 mA; VS = VSREG = 0 V

2.5

RDSON

DC output resistance

ILOAD = 250 mA; Tj = 25 °C

1.4

Ω

ILOAD = 250 mA; Tj = 130 °C

2.2

Ω

IOLimit

Overcurrent limitation

8 V < VS < 16 V

500

1500

tONHL

Turn on delay time to

10% VOUT

100

µs

tOFFLH

Turn off delay time to

90% VOUT

100

µs

tSCF

Short circuit filter time

µs

dVmax/dt

Maximum external

applied slew rate on

LS1_FSO and LS2_FSO

without switching on LS

Guaranteed by design

V/µs

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