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TDA3681 Datasheet PDF : 29 Pages
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Philips Semiconductors
Multiple voltage regulator with switch and
ignition buffer
Product specification
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
18
V
reverse polarity
non-operating
−
−
18
V
regulator 2 on
note 1
4
14.4
50
V
jump start
t ≤ 10 minutes
−
−
30
V
load dump protection t ≤ 50 ms; tr ≥ 2.5 ms
−
−
50
V
VP2
supply voltage 2
operating
6.5 14.4
18
V
reverse polarity
non-operating
−
−
18
V
regulator 2 on
0
−
50
V
jump start
t ≤ 10 minutes
−
−
30
V
load dump protection t ≤ 50 ms; tr ≥ 2.5 ms
−
−
50
V
Vbat(loaddump) battery overvoltage
shutdown
VP1 and/or VP2
18 20
22
V
Iq(tot)
total quiescent supply
current
VP = 12.4 V; note 2
VP = 14.4 V; note 2
−
105
145
µA
−
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
V
Vth(f)
Vhys
falling threshold voltage VP1 falling
hysteresis voltage
4.0 4.5
5.0
V
−
2.5
−
V
Schmitt trigger for enable input (regulators 1, 3, 4 and power switch)
Vth(r)
rising threshold voltage
Vth(f)
falling threshold voltage
Vhys
hysteresis voltage
ILI
input leakage current
Reset trigger level of regulator 2
IREG = ISW = 1 mA
VEN = 5 V
1.4 1.8
2.4
V
0.9 1.3
1.9
V
−
0.5
−
V
1
5
20
µA
Vth(r)
Vth(f)
rising threshold voltage
falling threshold voltage
VP1 rising; IREG2 = 50 mA;
note 3
VP1 falling; IREG2 = 50 mA;
note 3
4.43 VREG2 − 0.15 VREG2 − 0.1 V
4.4 VREG2 − 0.25 VREG2 − 0.13 V
Schmitt triggers for hold circuit output
Vth(r)(REG1)
Vth(f)(REG1)
Vhys(REG1)
rising threshold voltage
of regulator 1
falling threshold voltage
of regulator 1
hysteresis voltage due to
regulator 1
VP1 rising; note 3
VP1 falling; note 3
−
VREG1 − 0.15 VREG1 − 0.075 V
7.67 VREG1 − 0.35 −
V
−
0.2
−
V
2004 Mar 31
13
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