l4953 STMicroelectronics, l4953 Datasheet

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l4953

Manufacturer Part Number
l4953
Description
Multifunction Voltage Regulator For Car Radio
Manufacturer
STMicroelectronics
Datasheet

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DESCRIPTION
The L4953 contains a triple voltage regulator and
a power switch.
The IC includes a monitoring circuit to warn if a
BLOCK DIAGRAM
June 2000
MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
10V (500mA); 5V (1A); 5V (100mA) STANDBY
PENDENT ENABLE CONTROL FOR STAND-
BY MODE
OUTPUT (16V)
– SUPPLY UNDERVOLTAGE (LVW)
– OVERVOLTAGE
– THERMAL PROTECTION
PROTECTION
3 OUTPUTS:
OUT1 (10V) AND OUT2 (5V) WITH INDE-
3A HIGH SIDE DRIVER WITH CLAMPED
LOGIC OUTPUT FOR:
RESET FUNCTION
IGNITION COMPARATOR
REVERSE BATTERY AND LOAD DUMP
THERMAL SHUTDOWN
POW GND
SIG GND
IGN INP
EN 10V
EN 16V
STCAP
EN 5V
V S
D94AU053A
7
3
1
12
2
15
5
8
LOAD DUMP
BATT PROT
AND REV
PROT
IGN OUT
6
GEN
REF
IGNITION THRESHOLD
Vref2 Reset THRESHOLD
Vref1 LVW THRESHOLD
VCAP
low voltage or no voltage condition is 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 sup-
ply capacitor that will hold enough energy for the
5V Stand-by line to allow the P to store data.
VOLTAGE CLAMP
REGULATOR
REGULATOR
REGULATOR
5V, 1000mA
10V, 500mA
SWITCHED
SWITCHED
SWITCHED
5V, 100mA
STAND-BY
LVW/FAULT
16V, 3A
13
UNDERVOLTAGE
THERMAL PROT
OVERVOLTAGE
RESET
ORDERING NUMBER: L4953
14
RESET
Multiwatt 15
11
10
9
4
STAND-BY 5V
OUT 5V
OUT 10V
OUT 16V
L4953
1/6

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l4953 Summary of contents

Page 1

... OVERVOLTAGE – THERMAL PROTECTION RESET FUNCTION IGNITION COMPARATOR REVERSE BATTERY AND LOAD DUMP PROTECTION THERMAL SHUTDOWN DESCRIPTION The L4953 contains a triple voltage regulator and a power switch. The IC includes a monitoring circuit to warn if a BLOCK DIAGRAM LOAD DUMP AND REV BATT PROT ...

Page 2

... L4953 ABSOLUTE MAXIMUM RATINGS Symbol V DC Operating Supply Voltage SDC V Transient Supply Voltage STR I Output Current O T Operating Temperature Range op T Storage Temperature stg PIN CONNECTION (Top view) TAB CONNECTED TO PIN 8 THERMAL DATA Symbol R Thermal Resistance Junction-case th j-case 2/6 Parameter internally limited ...

Page 3

... O 5.5V < V < 10V I = 500mA 500mA O Output Shorted to GND 500 f = 3KHz 45 3.5 100 18V 14 16V < V < 15V 3.5 100 10 L4953 Typ. Max. Unit 18 V 200 400 150 mV 0.2 0.6 V 0 ...

Page 4

... L4953 ELECTRICAL CHARACTERISTICS (continued) FAULT Symbol Parameter TH Fault Threshold fault HYST Fault Threshold Hysteresis fault OUT Fault Output Voltage fault I Fault Leakage Current leak RESET THON Reset ON Threshold reset HYST Reset Threshold Hysteresis reset OUT Reset Output Voltage reset I Reset Leakage Current ...

Page 5

... L2 17.65 18.1 0.695 L3 17.25 17.5 17.75 0.679 0.689 L4 10.3 10.7 10.9 0.406 0.421 L7 2.65 2.9 0.104 M 4.25 4.55 4.85 0.167 0.179 M1 4.63 5.08 5.53 0.182 0.200 S 1.9 2.6 0.075 S1 1.9 2.6 0.075 Dia1 3.65 3.85 0.144 OUTLINE AND MAX. MECHANICAL DATA 0.197 0.104 0.063 0.022 0.030 0.060 0.710 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.218 0.102 Multiwatt15 V 0.102 0.152 L4953 5/6 ...

Page 6

... L4953 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 ...

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