SGS Thomson Microelectronics L4953K Datasheet
L4953K
MULTIFUNCTIONVOLTAGE REGULATOR FOR CAR RADIO
3 OUTPUTS:
8.25V (500mA); 5V (1A); 5V (100mA)
STANDBY
OUT1 (8.25V) AND OUT2 (5V) WITH INDEPENDENT ENABLE CONTROL FOR STANDBY MODE
1.5A HIGH SIDE DRIVER WITH CLAMPED
OUTPUT(16V)
LOGICOUTPUTFOR:
– SUPPLYUNDERVOLTAGE (LVW)
– OVERVOLTAGE(FAULT)
– THERMALPROTECTION (FAULT)
RESETFUNCTION
IGNITIONCOMPARATOR
REVERSE BATTERY AND LOAD DUMP
PROTECTION
THERMALSHUTDOWN
DESCRIPTION
The L4953K contains a triple voltage regulator
and a power switch.
The IC includes a monitoring circuit to warn if a
ORDERING NUMBER: L4953K
low voltage orno voltageconditionis occuring.
In stand-by output is active as long as possible
even when in thermalshutdownor any other fault
conditions.
The STCAP pin allows the use of a reserve supply capacitor that will hold enough energy for the
5V Stand-by line to allow the µP to store data.
Multiwatt 15
BLOCK DIAGRAM
7
V
SIG GND
EN 5V
STCAP
EN 8.25V
EN 16V
IGN INP
POW GND
S
3
1
12
2
15
5
8
D94AU213B
DUMP
LOAD
AND
REV
BATT PROT
VCAP
Vref1 LVW THRESHOLD
REF
GEN
Vref2 Reset THRESHOLD
IGNITION THRESHOLDPROT
IGN OUT LVW/FAULT RESET
June 2000
This is advanced information on a new productnow indevelopmentor undergoingevaluation. Details are subject to change without notice.
5V,
100mA
REGULATOR
STAND-BY
5V,
1000mA
REGULATOR
SWITCHED
8.25V,
REGULATOR
SWITCHED
16V,
VOLTAGE
SWITCHED
500mA
1.5A
CLAMP
OVERVOLTAGE
UNDERVOLTAGE
THERMAL
RESET
PROT
14136
11
9
10
4
STAND-BY 5V
OUT 5V
OUT 8.25V
OUT 16V
1/8
L4953K
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 Temperature Range –40 to85
Storage Temperature –55 to150
C
°
C
°
TAB CONNECTED TO PIN 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
2/8
R
th j-case
C/W
°
L4953K
ELECTRICALCHARACTERISTICS
(V
S
= 14V, T
=25°C, unless otherwise specified.)
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
T
shud
Thermal Shutdown Junction
155
Temperature
5V STAND-BYOUTPUT VOLTAGE
V
∆V
∆V
V
dropout
I
qst-by
5st-by
line
load
Stand-by Output Voltage I
= 5mA 4.75 5 5.25 V
Load
Line Regulation 11V < VS< 16V 5 50 mV
Load Regulation 5mA < Iout < 100mA 45 150 mV
Dropout Voltage I
Quiescent Current @ Stand-by I
= 100mA, VS= 5.5V 0.2 0.6 V
out
= 5mA 0.3 0.5 mA
Load
5V/1000mASWITCHED OUTPUT VOLTAGE
V
out5
∆V
line
∆V
load
V
dropout
I
q
SWon Switch ON 3.5 V
SW off Switch OFF 1.5 V
SW hyst Switch Hysteresis 100 200 350 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 < Iout < 1A 12 50 mV
Dropout Voltage I
Quiescent Current 75mA < I
= 1A, VS= 5.5V 1 1.5 V
out
< 1A 30 100 mA
out
Input Impedance 25 40 50 K
8.25V/500mASWITCHED OUTPUT VOLTAGE
C
°
Ω
V
out
∆V
line
∆V
load
V
dropout
I
q
SVR Supply Voltage Rejection f = 100Hz
8.25V Output Voltage no load 7.9 8.25 8.6 V
Line Regulation 11V < VS < 18V 5 50 mV
Load Regulation Iout = 500mA 12 50 mV
Dropout Voltage I
Quiescent Current I
= 500mA, 5.5V < VS< 8.8V 0.4 0.9 V
out
= 500mA 10 25 mA
out
f = 10KHz
55
40
75 dB
SWon Switch ON 3.5 V
SW off Switch OFF 1.5 V
SW hyst Switch Hysteresis 100 200 350 mV
R
in
Input Impedance 25 40 50 KΩ
HIGH SIDEDRIVERWITHCLAMPEDOUTPUT(16V)
V
out16
I
O
V
dropout
SWon Switch ON 3.5 V
SW off Switch OFF 1.5 V
SW hyst Switch Hysteresis 100 200 350 mV
R
in
Max. Output Voltage VS= 18V 15 16.2 V
Output Continuous Current VS = 15V 1.5 A
Dropout Voltage I
= 1A, 6V < VS< 15V 0.4 0.9 V
out
Input Impedance 25 40 50 KΩ
3/8
Loading...