Philips Semiconductors
Multiple voltage regulator with switch and
ignition buffer
Product specification
TDA3681
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
Iq
SVRR
quiescent current
supply voltage ripple
rejection
IREG1 = 600 mA
fi = 3 kHz; Vi = 2 V (p-p)
−
25
60 70
Vdrop(REG1) drop-out voltage
IREG1 = 550 mA; VP1 = 8.55 V; −
0.4
note 7
Im(REG1)
Isc(REG1)
current limit
short-circuit current
VREG1 > 7 V; note 8
RL ≤ 0.5 Ω; note 9
0.65 1.2
250 800
Regulator 2 (IREG2 = 5 mA; unless otherwise specified)
Vo(REG2)
∆Vline
∆Vload
SVRR
output voltage
line regulation
load regulation
supply voltage ripple
rejection
0.5 mA ≤ IREG2 ≤ 300 mA
7 V ≤ VP1 ≤ 18 V
18 V ≤ VP1 ≤ 50 V;
IREG2 ≤ 150 mA
6 V ≤ VP1 ≤ 18 V
6 V ≤ VP1 ≤ 50 V
1 mA ≤ IREG2 ≤ 150 mA
1 mA ≤ IREG2 ≤ 300 mA
fi = 3 kHz; Vi = 2 V (p-p)
4.75 5.0
4.75 5.0
4.75 5.0
−
2
−
15
−
20
−
−
50 55
Vdrop(REG2) drop-out voltage
IREG2 = 100 mA; VP1 = 4.75 V; −
0.4
note 7
IREG2 = 200 mA; VP1 = 5.75 V; −
0.8
note 7
IREG2 = 100 mA; VBU = 4.75 V; −
0.2
note 10
IREG2 = 200 mA; VBU = 5.75 V; −
0.8
note 10
Im(REG2)
Isc(REG2)
current limit
short-circuit current
VREG2 > 4.5 V; note 8
RL ≤ 0.5 Ω; note 9
0.32 0.37
95 120
Regulator 3 (IREG3 = 5 mA; unless otherwise specified)
Vo(off)
Vo(REG3)
∆Vline
∆Vload
Iq
SVRR
output voltage off
output voltage
line regulation
load regulation
quiescent current
supply voltage ripple
rejection
1 mA ≤ IREG3 ≤ 1400 mA
7 V ≤ VP1 and/or VP2 ≤ 18 V
7 V ≤ VP1 and/or VP2 ≤ 18 V
1 mA ≤ IREG3 ≤ 1400 mA
IREG3 = 1400 mA
fi = 3 kHz; Vi = 2 V (p-p)
−
1
4.75 5.0
4.75 5.0
−
2
−
20
−
19
60 70
Vdrop(REG3) drop-out voltage
IREG3 = 1400 mA ; VP2 = 6 V; −
1
note 7
Im(REG3)
Isc(REG3)
current limit
short-circuit current
VREG3 > 4.5 V; note 8
RL ≤ 0.5 Ω; note 9
1.5 1.7
430 750
MAX.
60
−
0.7
−
−
5.25
5.25
5.25
50
75
50
100
−
0.6
1.2
0.5
1.0
−
−
400
5.25
5.25
50
150
45
−
1.5
−
−
UNIT
mA
dB
V
A
mA
V
V
V
mV
mV
mV
mV
dB
V
V
V
V
A
mA
mV
V
V
mV
mV
mA
dB
V
A
mA
2004 Mar 31
15