l4952 STMicroelectronics, l4952 Datasheet - Page 3

• Manufacturer Part Number: l4952
• Description: Voltage Regulator For Car Radio Applications
• Manufacturer: STMicroelectronics

ELECTRICAL CHARACTERISTICS (V
FUNCTIONAL DESCRIPTION
The L4952 is a monolithic voltage regulator with
an output voltage of typically 8.6V and a maxi-
mum output current of 150mA. It ’s a device for
audio applications in carradios.
The device contain a precision Bandgap refer-
ence, a output amplifier with overcurrent protec-
tion, two voltage switches, a driver for an external
Voltage Regulator (OUT 1)
Voltage Regulator (OUT 4)
Diagnostic Output
Voltage Switches Vout2/3
High Side Switch Driver
V
V
V
V
I
Symbol
IN ON/OFF
IN H EN2,3
IN H HSON
V
IN L EN2,3
IN L HSON
V
SVRR
SVRR
V
V
V
I
V
I
V
V
V
V
V
oLim1
o4Lim
INLEN
INHEN
I
V
V
LDIAG
I
I
DPHS
DPHS
V
ssb
INH
INL
o4Lo
DP1
DP4
DP2
DP3
I
oLo
o1
o4
s
out
V
V
Low Voltage EN
High Voltage EN
EN2, EN3, Low Voltage
EN2, EN3, High Voltage
HSON Low Voltage
HSON High Voltage
Current EN2, EN3, HSON
Current EN2, EN3, HSON
Current High EN
Output voltage
Dropout voltage
Supply Voltage ripple rejection
Load regulation
Current limits
Output voltage
Dropout voltage
Supply Voltage ripple rejection
Load regulation
Current limits
Output Diagnostic Low voltage
Output voltage drop before
diagnostic activation
Dropout V
Dropout V
Low Drop Voltage
Drop detection threshold
s
s
Quiescent current
standby current
out2
out3
Parameter
s
= 14V; T
no Load
EN = 0V
V
V
V
V
V
V
no load
V
I
I
I
f = 100Hz, C = 10 F ESR = 5
10mA < I
V
no load
I = 3mA V
I = 1.5mA V
f = 100Hz C = 10 F ESR = 5
0.5mA < I < 3 mA
V
R
V
I
I
I
I
I
I
V
o1
o1
o1
O2
o2
o2
o3
o3
out
S
S
S
In
In
In
s
OUT
OUT
S
Dth
DIAG
= 0.15A, I
= 0.1A, I
= 0.05A, I
= 8.4V, V
= 50mA, En
= 25mA, En
= 75mA, En
= 18V
= 18V
= 18V
> 6V I
= 40mA, En
= 5V
= 0V
= 5V
= I
= 50mA, HSON = H
= V
= 8V
= 8V
O3
to 5 V = 10K
J
Test Condition
= 25°C unless otherwise specified)
S
= 0mA
o
O1
- V
s
< 150 mA
02,3
= 8.6V
s
02,3
02,3
DP1
= 100mA
14
pnp switch, a discharge circuitry for theft detec-
tion and a overtemperature protection.
For automatic PCB assembly
SO12+4+4. To use the maximal current of 150mA
a small copper area of 2cm
board (Rth=60K/W) is necessary.
The device has a very low quiescent current in
standby mode. If the digital Input EN is Low the
device is switched off (stand by mode) and if EN
= 8.6V
, HSON = H
= 0mA
2
2
3
3
= V
= 0mA
= 0mA
= H
= H
= L
= L
s
- V
out1
Min.
1.45
-0.3
150
3.5
-18
-18
2.0
-10
-10
8.4
9.5
0.7
60
30
8
0.075
0.125
Typ.
0.16
0.11
0.06
10.0
0.14
0.25
0.25
0.14
0.26
100
300
100
1.6
8.6
30
70
30
60
60
30
0
1
2
as heat sink on
the package is
Max.
1.05
10.5
0.15
0.25
0.28
200
800
200
8.8
0.5
1.0
0.6
0.4
0.2
0.3
0.4
0.5
0.5
0.8
1.3
20
18
18
18
70
10
60
5
L4952
Unit
mA
mV
mA
mV
mA
mV
dB
dB
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
A
A
A
A
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