TDA3681TH datasheet(13/28 Pages) PHILIPS

13 / 28 page

2002 Apr 10

Philips Semiconductors

Product speciﬁcation

Multiple voltage regulator with switch and

ignition buffer

TDA3681

CHARACTERISTICS

VP =VP1 =VP2 = 14.4 V; Tamb =25 °C; measured in test circuits of Figs 10 and 11; unless otherwise speciﬁed.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supplies

VP1

supply voltage 1

operating

9.5

14.4

reverse polarity

non-operating

−−

regulator 2 on

note 1

14.4

jump start

≤ 10 minutes

−−

load dump protection

≤ 50 ms; t

r ≥ 2.5 ms

−−

VP2

supply voltage 2

operating

6.5

14.4

reverse polarity

non-operating

−−

regulator 2 on

−

jump start

≤ 10 minutes

−−

load dump protection

≤ 50 ms; t

r ≥ 2.5 ms

−−

Vbat(loaddump) battery overvoltage

shutdown

VP1 and/or VP2

Iq(tot)

total quiescent supply

current

VP = 12.4 V; note 2

−

105

145

µA

VP = 14.4 V; note 2

−

110

150

µA

Schmitt trigger for power supply (regulators 1, 3 and 4)

Vth(r)

rising threshold voltage

VP1 rising

6.5

7.0

7.5

Vth(f)

falling threshold voltage

VP1 falling

4.0

4.5

5.0

Vhys

hysteresis voltage

−

2.5

−

Schmitt trigger for enable input (regulators 1, 3, 4 and power switch)

Vth(r)

rising threshold voltage

1.4

1.8

2.4

Vth(f)

falling threshold voltage

0.9

1.3

1.9

Vhys

hysteresis voltage

IREG =ISW =1mA

−

0.5

−

ILI

input leakage current

VEN =5V

µA

Reset trigger level of regulator 2

Vth(r)

rising threshold voltage

VP1 rising; IREG1 =50mA;

note 3

4.43

VREG2 − 0.15 VREG2 − 0.1

Vth(f)

falling threshold voltage

VP1 falling; IREG1 =50mA;

note 3

4.4

VREG2 − 0.25 VREG2 − 0.13

Schmitt triggers for hold circuit output

Vth(r)(REG1)

rising threshold voltage

of regulator 1

VP1 rising; note 3

−

VREG1 − 0.15 VREG1 − 0.075 V

Vth(f)(REG1)

falling threshold voltage

of regulator 1

VP1 falling; note 3

7.67

VREG1 − 0.35 −

Vhys(REG1)

hysteresis voltage due to

regulator 1

−

0.2

−

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