L9758 datasheet(19/29 Pages) STMICROELECTRONICS

19 / 29 page

L9758

Electrical characteristics

Doc ID 14273 Rev 3

19/29

4.11

IGN and PSU_EN inputs

Tamb = -40 °C to 125 °C, VBAT = VBAT_SW = 5.5 to 26.5 V, unless otherwise specified.

Table 17.

RSTL reset signals

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

IRSTL_H

Reset “high”

leakage current

VDDL= 5.15 V

-3.0

µA

VRSTL_L

Reset “low” output

voltage

VDDL=5.0V Ire=5mA

VDDL=1.0V Ire=1mA

0.4

VFTH_RSTL

Reset threshold

decreasing

ΔV

DDL/Δt < 0, VPROG3=Low

2.375

VDDL–

0.05

VRTH_RSTL

Reset threshold

increasing

ΔV

DDL/Δt < 0, VPROG3=Low

2.375

VDDL–

0.02

VFTH_RSTL_O

Reset threshold

decreasing

ΔV

DDL/Δt < 0, VPROG3=Open

3.13

VDDL–

0.05

VRTH_RSTL_O

Reset threshold

increasing

ΔV

DDL/Δt < 0, VPROG3=Open

3.13

VDDL–

0.02

VHY_RSTL

Reset threshold

hysteresis

-40

tACT_RSTL

Reset activation out

of tolerance duration

-15

μs

tDEL_RSTL

Reset delay

1nF < CEXT< 10nF; 4.7kΩ < Rext < 47kΩ

tERR_RSTL

Reset delay

accuracy

Rext ±1%

-15

+15

Table 18.

IGN and PSU_EN inputs

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VTH_IGN

IGN input threshold

threshold @ IGN pin

3.6

VHYS_IGN

IGN input threshold

hysteresis

0.2

1.4

RPD_IGN

IGN pull-down resistor

300

1100

VTH_PSUEN

PSU_EN input threshold

0.9

0.55*

VSTBY

VHYS_PSUEN

PSU_EN input threshold

hysteresis

0.2

0.8

RPD_PSUEN

PSU pull-down resistor

230

VOL_IGNON

IGN_ON “low” output

voltage

Iol=1mA

0.4

RIGN_EXT

IGN external input

resistance

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