TDA3681TH PHILIPS [NXP Semiconductors], TDA3681TH Datasheet - Page 20

• Manufacturer Part Number: TDA3681TH
• Description: Multiple voltage regulator with switch and ignition buffer
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
2002 Apr 10
handbook, full pagewidth
Multiple voltage regulator with switch and
ignition buffer
(1) A minimum capacitor of 220 nF on the supply lines V
(2) A minimum capacitor of 1 F for backup supply is required for stability.
(3) Capacitor represents the typical input capacitance of CMOS logic connected to the reset and hold outputs.
V ENSW
V EN1/3
V IGNIN
V EN4
V P1
V P2
V BU
10 k
R6
enable input power switch
enable input regulator 1/3
220 nF
220 nF
enable input regulator 4
(2)
C1
C7
supply voltage 2
supply voltage 1
C10
100 F
C11
1 nF
C8
47 nF
(1)
(1)
ignition input
reset delay
capacitor
backup
Fig.11 Test circuit of TDA3681TH.
heat tab
P1
20
5
13
2
14
8
7
6
and V
11
TDA3681TH
P2
is required for stability.
10
ground
20
16
12
17
19
1
4
9
3
regulator 4
output
reset
output
hold output
ignition output
regulator 2
output
regulator 1
output
regulator 3
output
power switch output
R3
10 k
C2
10 F
C3
10 F
C4
10 F
C5
10 F
C6
10 F
8.5 V
3.3 V
5 V
5 V
(3)
(3)
C9
50 pF
C12
50 pF
MGU355
Product specification
R L(SW)
12 k
R L(REG2)
5 k
R L(REG1)
10 k
R L(REG3)
5 k
R L(REG4)
5 k
TDA3681