L4953G
MULTIFUNCTIONVOLTAGE REGULATOR FOR CAR RADIO
PRELIMINARY DATA
3 OUTPUTS:
9.2V (500mA);
5V (1A);
5V (100mA)STANDBY
OUT1 (9.2V) AND OUT2 (5V) WITH INDEPENDENT ENABLE CONTROL FOR STANDBY MODE
2A HIGH SIDE DRIVER WITH CLAMPED
OUTPUT(16V)
LOGICOUTPUT FOR:
– SUPPLYUNDERVOLTAGE (LVW)
– OVERVOLTAGE
– THERMAL PROTECTION
RESETFUNCTION
IGNITIONCOMPARATOR
REVERSE BATTERY AND LOAD DUMP
PROTECTION
THERMALSHUTDOWN
DESCRIPTION
The L4953G contains a triple voltage regulator
and a power switch.
BLOCK DIAGRAM
The IC includes a monitoring circuit to warn if a
low voltageor no voltage conditionis occuring.
In stand-by output is active as long as possible
even when in thermal shutdown 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 to allow the µP tostore data.
Multiwatt15
7
V
POW GND
EN 5V
STCAP
EN 9.2V
EN 16V
IGN INP
SIG GND
S
3
1
12
2
15
5
8
D97AU579
LOAD DUMP
VCAP
Vref1 LVW THRESHOLD
REF
GEN
Vref2 ResetTHRESHOLD
IGNITION THRESHOLDPROT
IGN OUT LVW/FAULT RESET
5V,
100mA
REGULATOR
STAND-BY
5V,
1000mA
REGULATOR
SWITCHED
9.2V,
500mA
REGULATOR
SWITCHED
16V,
VOLTAGE
SWITCHED
2A
CLAMP
OVERVOLTAGE
UNDERVOLTAGE
THERMAL
RESET
PROT
14136
11
9
10
4
STAND-BY 5V
OUT 5V
OUT 9.2V
OUT 16V
April 1999
This is preliminary information on a newproduct now in development.Details are subjectto change without notice.
1/6
L4953G
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
SDC
V
STR
I
O
T
op
T
stg
PIN CONNECTION (Topview)
DC Operating Supply Voltage –0.6 to 28 V
Transient Supply Voltage 50 V
Output Current internally limited
Operating TemperatureRange –40 to 85 °C
Storage Temperature –55 to 150 °C
TAB CONNECTED TO PIN 8
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
D97AU580
EN 16V
RESET
LVW/FAULT
STCAP
STBY5V
OUT 9.2V
OUT 5V
PGND
V
S
IGNOUT
IGNINP
OUT 16V
SGND
EN 9.2V
EN 5V
THERMAL DATA
Symbol Parameter Value Unit
R
th j-case
Thermal Resistance Junction-case 2 °C/W
2/6
L4953G
ELECTRICALCHARACTERISTICS (VS= 14V,T
= –40 to85°C, unless otherwisespecified.)
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
f = 100Hz to 200KHz
5V STAND-BYOUTPUTVOLTAGE
V
∆
∆
V
dropout
I
qst-by
5st-by
V
line
V
load
Stand-by Output Voltage 4.75 5 5.25 V
Line Regulation 11V < VS< 16V 5 50 mV
Load Regulation 5mA < IO< 100mA 12 100 mV
Dropout Voltage I
Quiescent Current @ Stand-by SW < 1.5V
= 100mA V
out
= 5.5V 0.2 0.6 V
bat
0.3 0.65 mA
5V ST-BY = 100µA Load
5V/1000mASWITCHEDOUTPUT VOLTAGE
V
out5
∆V
line
V
∆
load
V
dropout
I
q
I
lim
SWon Switch ON I
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 V
= 5.5V IO= 1A 1.0 1.5 V
bat
Quiescent Current 75mA < IO< 1A 30 100 mA
Current Limit Output Shorted toGND 1 1.3 A
= 75mA 3.5 V
O
Input Impedance 10 40 KΩ
9.2V/500mASWITCHED OUTPUT VOLTAGE
V
µ
V
∆V
∆V
V
dropout
out9.2
line
load
I
q
I
lim
9.2V Output Voltage no load 9.2±5% V
Line Regulation 11V < VS< 18V 5 50 mV
Load Regulation 5mA < IO< 500mA 12 50 mV
Dropout Voltage 5.5V < Vin< 9.2V IO= 500mA 0.4 0.9 V
Quiescent Current 50mA < IO< 500mA 10 25 mA
Current Limit Output Shorted toGND 500 600 mA
SVR Supply Voltage Rejection f = 3KHz 45 75 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 SIDE DRIVER 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 Continuous Current VS= 16V 2 A
Dropout Voltage 5V < Vin< 15V IO= 2A 0.5 1.0 V
Input Impedance 10 40 K
Ω
3/6
L4953G
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 100 200 400 mV
fault
Fault Output Voltage 1.5 V
fault
Fault Leakage Current 50
A
µ
THON
reset
THOFF
HYST
OUT
I
reset
reset
reset
leak
IGNITION
TH
ign
HYST
ign
IGN
high
IGN
low
Reset ON Threshold MIN @ V
MAX @V
MEM
MEM
= 4.75V
= 5.25V
0.938 0.97 Vst-by
Reset OFF Threshold 0.97 0.99 Vst-by
Reset Threshold Hysteresis 75 175 300 mV
Reset Output Voltage I
Reset Leakage Current 5.0
Ign Comparator Positive
= 2mA 1.5 V
LOAD
5.5 6 7.5 V
A
µ
Threshold
Ign Comparator Threshold
100 300 500 mV
Hysteresis
Ignition Comparator Output
3.5 Vst-by V
High
Ignition Comparator Output Low –0.5 1.5 V
4/6
L4953G
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A5
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
L2 17.65 18.1 0.695
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
mm inch
0.197
0.886
0.713
OUTLINE AND
MECHANICAL DATA
Multiwatt15 V
5/6
L4953G
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publicationsupersedes and replaces all information previously supplied. STMicroelectronics products
are notauthorized for use as criticalcomponents in life support devices or systems without express writtenapproval of STMicroelectronics.
The ST logois a registeredtrademark of STMicroelectronics
1999 STMicroelectronics – Printedin Italy – All Rights Reserved
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