2004 Mar 31 13
Philips Semiconductors Product specification
Multiple voltage regulator with switch and
ignition buffer
TDA3681
CHARACTERISTICS
V
P
=V
P1
=V
P2
= 14.4 V; T
amb
=25°C; measured in test circuits of Figs 10 and 11; unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supplies
V
P1
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; t
r
≥ 2.5 ms −− 50 V
V
P2
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; t
r
≥ 2.5 ms −− 50 V
V
bat(loaddump)
battery overvoltage
shutdown
V
P1
and/or V
P2
18 20 22 V
I
q(tot)
total quiescent supply
current
V
P
= 12.4 V; note 2 − 105 145 µA
V
P
= 14.4 V; note 2 − 110 150 µA
Schmitt trigger for power supply (regulators 1, 3 and 4)
V
th(r)
rising threshold voltage V
P1
rising 6.5 7.0 7.5 V
V
th(f)
falling threshold voltage V
P1
falling 4.0 4.5 5.0 V
V
hys
hysteresis voltage − 2.5 − V
Schmitt trigger for enable input (regulators 1, 3, 4 and power switch)
V
th(r)
rising threshold voltage 1.4 1.8 2.4 V
V
th(f)
falling threshold voltage 0.9 1.3 1.9 V
V
hys
hysteresis voltage I
REG
=I
SW
=1mA − 0.5 − V
I
LI
input leakage current V
EN
=5V 1 5 20 µA
Reset trigger level of regulator 2
V
th(r)
rising threshold voltage V
P1
rising; I
REG2
=50mA;
note 3
4.43 V
REG2
− 0.15 V
REG2
− 0.1 V
V
th(f)
falling threshold voltage V
P1
falling; I
REG2
=50mA;
note 3
4.4 V
REG2
− 0.25 V
REG2
− 0.13 V
Schmitt triggers for hold circuit output
V
th(r)(REG1)
rising threshold voltage
of regulator 1
V
P1
rising; note 3 − V
REG1
− 0.15 V
REG1
− 0.075 V
V
th(f)(REG1)
falling threshold voltage
of regulator 1
V
P1
falling; note 3 7.67 V
REG1
− 0.35 − V
V
hys(REG1)
hysteresis voltage due to
regulator 1
− 0.2 − V
