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Электронный компонент: L4943

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3 PROGRAMMABLE OUTPUTS:
3 TO 11V (500mA);
3 TO 11V (500mA);
3 TO 7V (500mA) STANDBY
OUT1 AND OUT2 WITH INDEPENDENT EN-
ABLE CONTROL FOR STAND-BY MODE
0.4A HIGH SIDE DRIVER
LOAD DUMP PROTECTION
THERMAL SHUTDOWN
DESCRIPTION
The L4943 contains a triple voltage regulator and
a high side driver.
In stand-by the output is active as long as possi-
ble even when in thermal shutdown or under any
other fault conditions.
The STCAP pin allows the use of a reserve sup-
ply capacitor that will hold enough energy for the
5V Stand-by line to allow the
P to store data.
December 2000
D97AU668B
GEN
REF
V
MEM
(37)V 0.5A
V
ADJ1
(311)V 0.5A
V
ADJ2
(311)V 0.5A
HSD
LOAD
DUMP
V
MEM
V
MEM_feed
V
ADJ1
V
ADJ1_feed
V
ADJ2
V
ADJ2_feed
4
ST CAP
EN1
EN2
V
S
P-GND
S-GND
TAB
FILTER CAP
14
HSD
9
13
7
10
11
12
1
2
5
8
3
6
BLOCK DIAGRAM
Multiwatt 15
ORDERING NUMBER: L4943
L4943
MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
1/6
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
DC Operating Supply Voltage
-0.6 to 30
V
Transient Supply Overvoltage (50ms)
50
V
I
O
Voltage Regulator Output Current
Internally limited
V
in
Input Voltage (EN1, EN2)
0 to 6
V
RESR
Output Capacitor Series Eq. Resistance
0.2 to 10
P
tot
Power Dissipation (T
case
= 85C)
33
W
T
op
Operating Temperature Range
-40 to 85
C
T
stg
Storage Temperature Ranges
-55 to 150
C
THERMAL DATA
Symbol
Parameter
Value
Unit
R
Th j-case
Thermal Resistance Junction to Case
2
C/W
1
2
3
4
5
6
7
9
10
11
8
TAB
P-GND
HSD
EN2
EN1
TAB CONNECTED TO PIN 8
13
14
15
12
FILTER CAP
V
1
feed
ST CAP
V
MEM
D97AU674A
V
MEM_feed
V
2
V
1
V
S
S-GND
V
2
feed
PIN CONNECTION (t.b.d.)
L4943
2/6
ELECTRICAL CHARACTERISTICS (Referred to Test & Application Circuit; V
S
= 14.4V; T
amb
= 25C;
unless otherwise specified).
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
5V STAND-BY
V
out Mem
Output Voltage
no load; 1+R1/R2 = 2.4
no load; 1+R1/R2 = 4
no load; 1+R1/R2 = 5.6
2.85
4.75
6.65
3
5
7
3.15
5.25
7.35
V
V
V
V
line
Line Regulation
no load; 11<Vs<18V
5
50
mV
V
load
Load Regulation
5mA < I
O
< 500mA
8
80
mV
V
dropout
Dropout Voltage
I
O
= 200mA, V
O
= 5V
I
O
= 500mA, V
O
= 5V
0.36
0.9
0.5
1.25
V
V
I
lim
Current Limit
Out short to GND
550
800
1000
mA
I
qst-by
Quiescent Current
I
O
= 100
A; EN1 = EN2 =0
I
O
= 500mA; EN1 = EN2 = 5V
0.35
10
0.5
25
mA
mA
ADJUSTABLE REG1 SWITCHED
V
outadj
Output Voltage
no load; 1+R3/R4 = 2.4
no load; 1+R3/R4 = 4
no load; 1+R3/R4 = 8.8
2.85
4.75
10.45
3
5
11
3.15
5.25
11.55
V
V
V
V
line
Line Regulation
no load
0.7
7
mV/V
V
load
Load Regulation
5mA < I
O
< 500mA
8
80
mV
V
dropout
Dropout Voltage
I
O
= 200mA, V
O
= 5V
I
O
= 500mA, V
O
= 5V
I
O
= 200mA, V
O
= 11V
I
O
= 500mA, V
O
= 11V
0.45
1.1
0.4
1
0.6
1.5
0.55
1.4
V
V
V
V
I
lim
Current Limit
Out short to GND
550
800
1000
mA
I
q2
Quiescent Current
I
O
= 500mA
10
25
mA
SVR
Supply Voltage Rejection
f = 0.1 to 10kHz, V
O
= 5V
45
55
dB
EN1 on
EN ADJ1 ON
2
V
EN1 off
EN ADJ1 OFF
1
V
ADJUSTABLE REG2 SWITCHED
V
outadj
Output Voltage
no load; 1+R3/R4 = 2.4
no load; 1+R5/R6 = 4
no load; 1+R3/R4 = 8.8
2.85
4.75
10.45
3
5
11
3.15
5.25
11.55
V
V
V
V
line
Line Regulation
no load
0.7
7
mV/V
V
load
Load Regulation
5mA < I
O
< 500mA
12
80
mV
V
dropout
Dropout Voltage
I
O
= 200mA, V
O
= 5V
I
O
= 500mA, V
O
= 5V
I
O
= 200mA, V
O
= 11V
I
O
= 500mA, V
O
= 11V
0.45
1.1
0.4
1
0.6
1.5
0.55
1.4
V
V
V
V
I
lim
Current Limit
Out short to GND
550
800
1100
mA
I
q3
Quiescent Current
I
O
= 500mA
10
25
mA
SVR
Supply Voltage Rejection
f = 0.1 to 10kHz, V
O
= 5V
45
55
dB
EN2H on2
EN ADJ2 ON
1.3
V
EN2H off2
EN ADJ2 OFF
0.5
V
400mA HSD SWITCHED
V
dropout
Dropout Voltage
I
O
= 400mA, 9V < V
S
< 16V
0.2
0.6
V
I
lim
Current Limit
0.45
0.65
0.8
A
I
qhsd
Quiescent Current
I
O
= 400mA
10
25
mA
EN2 on H
EN HSD ON
2.5
V
EN2 off H
EN HSD OFF
1.7
V
EN2 Gap
EN HSD ON minus EN ADJ2
ON
1
V
L4943
3/6
D97AU672B
GEN
REF
V
MEM
(37)V 0.5A
V
ADJ1
(311)V 0.5A
V
ADJ2
(311)V 0.5A
HSD
LOAD
DUMP
V
MEM
V
MEM_feed
V
ADJ1
V
ADJ1_feed
V
ADJ2
V
ADJ2_feed
HSD
ST CAP
EN1
EN2
V
S
P-GND
S-GND
TAB
FILTER CAP
R1
11
10
7
13
9
14
4
8
3
6
2
5
1
12
15
R2
10
F
10
F
10
F
470
F
R3
R4
10
F
R5
R6
Figure 1. Application circuit.
L4943
4/6
Multiwatt15 V
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
5
0.197
B
2.65
0.104
C
1.6
0.063
D
1
0.039
E
0.49
0.55
0.019
0.022
F
0.66
0.75
0.026
0.030
G
1.02
1.27
1.52
0.040
0.050
0.060
G1
17.53
17.78
18.03
0.690
0.700
0.710
H1
19.6
0.772
H2
20.2
0.795
L
21.9
22.2
22.5
0.862
0.874
0.886
L1
21.7
22.1
22.5
0.854
0.870
0.886
L2
17.65
18.1
0.695
0.713
L3
17.25
17.5
17.75
0.679
0.689
0.699
L4
10.3
10.7
10.9
0.406
0.421
0.429
L7
2.65
2.9
0.104
0.114
M
4.25
4.55
4.85
0.167
0.179
0.191
M1
4.63
5.08
5.53
0.182
0.200
0.218
S
1.9
2.6
0.075
0.102
S1
1.9
2.6
0.075
0.102
Dia1
3.65
3.85
0.144
0.152
OUTLINE AND
MECHANICAL DATA
L4943
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L4943
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