Page 1
L4953
MULTIFUNCTIONVOLTAGE REGULATOR FOR CAR RADIO
3 OUTPUTS:
10V (500mA);5V (1A);5V (100mA)STANDBY
OUT1 (10V) AND OUT2 (5V) WITH INDEPENDENT ENABLE CONTROL FOR STANDBY MODE
3A HIGH SIDE DRIVER WITH CLAMPED
OUTPUT(16V)
LOGICOUTPUT FOR:
– SUPPLYUNDERVOLTAGE (LVW)
– OVERVOLTAGE
– THERMALPROTECTION
RESETFUNCTION
IGNITIONCOMPARATOR
REVERSE BATTERY AND LOAD DUMP
PROTECTION
THERMALSHUTDOWN
DESCRIPTION
The L4953 contains a triple voltage regulator and
a powerswitch.
The IC includes a monitoring circuit to warn if a
ORDERING NUMBER: L4953
low voltageor no voltageconditionis occuring.
In stand-by output is active as long as possible
even whenin thermalshutdown or any other fault
conditions.
The STCAP pin allows the use of a reserve supply capacitor that will hold enough energy for the
5V Stand-byline toallow the µP to storedata.
Multiwatt 15
BLOCK DIAGRAM
POW GND
STCAP
EN 10V
EN 16V
IGN INP
SIG GND
June 2000
EN 5V
V
S
7
3
1
12
2
15
5
8
D94AU053A
LOAD
DUMP
AND
REV
BATT PROT
5V, 100mA
REGULATOR
STAND-BY
5V, 1000mA
REGULATOR
SWITCHED
10V, 500mA
REGULATOR
SWITCHED
16V, 3A
VOLTAGE
VCAP
Vref1 LVW THRESHOLD
REF
GEN
Vref2 Reset THRESHOLD
IGNITION THRESHOLDPROT
IGN OUT LVW/FAULT RESET
CLAMP
SWITCHED
OVERVOLTAGE
UNDERVOLTAGE
THERMAL
RESET
PROT
14136
11
9
10
4
STAND-BY 5V
OUT 5V
OUT 10V
OUT 16V
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Page 2
L4953
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
SDC
V
STR
I
O
T
op
T
stg
PIN CONNECTION (Topview)
DC Operating Supply Voltage –14 to28 V
Transient Supply Voltage 50 V
Output Current internally limited
Operating TemperatureRange –40 to85
Storage Temperature –55 to150
C
°
C
°
TAB CONNECTED TOPIN 8
15
14
13
12
11
10
EN 16V
RESET
LVW/FAULT
STCAP
STBY5V
OUT 8.25V
9
8
7
6
5
4
3
2
1
D94AU054B
OUT 5V
PGND
V
S
IGNOUT
IGNINP
OUT 16V
SGND
EN 8.25V
EN 5V
THERMAL DATA
Symbol Parameter Value Unit
Thermal Resistance Junction-case 2
2/6
R
th j-case
C/W
°
Page 3
L4953
ELECTRICALCHARACTERISTICS
(V
S
= 14V,T
=25°C, unlessotherwisespecified.)
amb
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
En Output Noise Voltage Any reg. supply,
Operating Supply Voltage 11 18 V
200 400 µV
f = 100Hz to 200KHz
5V STAND-BYOUTPUTVOLTAGE
V
∆
∆V
V
dropout
I
qst-by
5st-by
V
line
load
Stand-by OutputVoltage No load 4.75 5 5.25 V
Line Regulation 11V < VS< 16V 5 50 mV
Load Regulation 5mA < IO< 100mA 45 150 mV
Dropout Voltage I
= 100mA VS= 5.5V 0.2 0.6 V
out
Quiescent Current@ Stand-by IL= 5mA 0.3 0.65 mA
5V/1000mASWITCHEDOUTPUT VOLTAGE
V
out5
V
∆
line
V
∆
load
V
dropout
I
q
I
lim
SWon Switch ON 3.5 V
SW off Switch OFF 1.5 V
SW hyst Switch Hysteresis 100 200 500 mV
R
in
5V Output Voltage no load 4.75 5 5.25 V
Line Regulation 7V < VS< 18V 5 50 mV
Load Regulation 5mA < IO<1A 12 50 mV
Dropout Voltage IO=1A VS= 5,5V 1 1.5 V
Quiescent Current IO= 1A 30 100 mA
Current Limit Output Shortedto GND 1 1.3 A
Input Impedance 10 40 KΩ
10V/500mASWITCHEDOUTPUT VOLTAGE
V
∆V
∆
V
dropout
out10
line
V
load
I
q
I
lim
10V Output Voltage no load 9.5 10 10.5 V
Line Regulation 11V < VS< 18V 5 50 mV
Load Regulation 5mA < IO< 500mA 12 50 mV
Dropout Voltage 5.5V < VS< 10V IO= 500mA 0.4 0.9 V
Quiescent Current IO= 500mA 10 50 mA
Current Limit Output Shortedto GND 500 600 mA
SVR Supply VoltageRejection f = 3KHz 45 dB
SWon Switch ON 3.5 V
SW off Switch OFF 1.5 V
SW hyst Switch Hysteresis 100 200 500 mV
R
in
Input Impedance 10 40 KΩ
HIGH SIDEDRIVER WITHCLAMPED OUTPUT(16V)
V
out16
I
O
V
dropout
SWon Switch ON 3.5 V
SW off Switch OFF 1.5 V
SW hyst Switch Hysteresis 100 200 500 mV
R
in
Max. Output Voltage VS= 18V 14.6 16.2 V
Output ContinuousCurrent VS= 16V 2 A
Dropout Voltage 6V < Vin< 15V IO= 1A 0.4 0.9 V
Input Impedance 10 40 K
Ω
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Page 4
L4953
ELECTRICALCHARACTERISTICS(continued)
FAULT
Symbol Parameter Test Condition Min. Typ. Max. Unit
TH
HYST
OUT
I
leak
RESET
fault
Fault Threshold 7 8.5 V
Fault Threshold Hysteresis 100 200 300 mV
fault
Fault OutputVoltage 1.5 V
fault
Fault Leakage Current 50
A
µ
THON
reset
HYST
reset
OUT
reset
I
leak
IGNITION
TH
ign
HYST
ign
IGN
high
IGN
low
Reset ON Threshold 4.5 5.15 V
Reset Threshold Hysteresis 75 175 300 mV
Reset Output Voltage 1.5 V
Reset Leakage Current 5 µA
Ign Comparator Positive
5.5 6 7.5 V
Threshold
Ign Comparator Threshold
100 300 500 mV
Hysteresis
Ignition Comparator Output High 3.5 Vst-by V
Ignition Comparator Output Low –0.5 1.5 V
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Page 5
L4953
DIM.
Dia1 3.65 3.85 0.144 0.152
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
mm inch
OUTLINE AND
MECHANICAL DATA
Multiwatt15 V
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Page 6
L4953
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