L4952D 데이터 시트보기 (PDF) - STMicroelectronics
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L4952D Datasheet PDF : 8 Pages
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L4952
ELECTRICAL CHARACTERISTICS (Vs = 14V; TJ = 25°C unless otherwise specified)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
Is
Vs Quiescent current
Issb
Vs standby current
no Load
EN = 0V
1.6
5
mA
0
20
µA
VINLEN
Low Voltage EN
-0.3
0.5
V
VINHEN High Voltage EN
VS = 18V
3.5
18
V
VIN L EN2,3 EN2, EN3, Low Voltage
-18
1.05
V
VIN H EN2,3 EN2, EN3, High Voltage
VS = 18V
1.45
18
V
VIN L HSON HSON Low Voltage
-18
1.0
V
VIN H HSON HSON High Voltage
VS = 18V
2.0
18
V
IINH
Current EN2, EN3, HSON
IINL
Current EN2, EN3, HSON
VIn = 5V
VIn = 0V
30
70
µA
-10
10
µA
t(s) IIN ON/OFF Current High EN
Voltage Regulator (OUT 1)
VIn = 5V
-10
100
200
µA
c Vo1
Output voltage
no load
8.4
8.6
8.8
V
du VDP1
Dropout voltage
Vs = 8.4V, VDP1= Vs - Vout1
ro Io1= 0.15A, I02,3 = 0mA
0.16 0.6
V
P Io1= 0.1A, I02,3 = 0mA
0.11 0.4
V
te Io1= 0.05A, I02,3 = 0mA
0.06 0.2
V
SVRR Supply Voltage ripple rejection f = 100Hz, C = 10µF ESR = 5Ω 60
70
dB
le VoLo
Load regulation
10mA < Io < 150 mA
30
60
mV
so IoLim1
Current limits
VOUT = 8V
150 300 800 mA
b Voltage Regulator (OUT 4)
O Vo4
Output voltage
no load
9.5 10.0 10.5
V
- VDP4
Dropout voltage
I = 3mA Vs = 8.6V
0.14 0.3
V
t(s)I = 1.5mA Vs = 8.6V
0.075 0.15
V
SVRR Supply Voltage ripple rejection f = 100Hz C = 10µF ESR = 5Ω
30
60
dB
uc Vo4Lo
Load regulation
0.5mA < I < 3 mA
100
mV
d Io4Lim
Current limits
VOUT = 8V
8
60
mA
ro Diagnostic Output
P VLDIAG
te ∆Vout
Output Diagnostic Low voltage
Output voltage drop before
diagnostic activation
RDIAG to 5 V = 10KΩ
VS > 6V IO1 = 100mA
IO2 = IO3 = 0mA
0.4
V
30
200 mV
le Voltage Switches Vout2/3
soVDP2
Dropout Vout2
Io2 = 50mA, En2 = H
0.25 0.5
V
b Io2 = 25mA, En2 = H
0.125 0.25
V
O VDP3
Dropout Vout3
Io3 = 75mA, En3 = L
0.25 0.5
V
High Side Switch Driver
Io3 = 40mA, En3 = L
0.14 0.28
V
VDPHS
Low Drop Voltage
Iout = 50mA, HSON = H
0.26 0.8
V
VDPHS Drop detection threshold
VDth = VS - V14, HSON = H
0.7
1
1.3
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
pnp switch, a discharge circuitry for theft detec-
tion and a overtemperature protection.
For automatic PCB assembly the package is
SO12+4+4. To use the maximal current of 150mA
a small copper area of 2cm2 as heat sink on
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
3/8
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