L4943 ,MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIOABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV DC Operating Supply Voltage -0.6 to 30 VSTrans ..
L4946B ,QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESETELECTRICAL CHARACTERISTICS (V = 10.5 to 16V; I = 6mA, I = 8mA, I = 4mA; I = 0.4mA;S O1 O2 O3 O4 C = ..
L4947 ,5V-0.5A VERY LOW DROP REGULATOR WITH RESETELECTRICAL CHARACTERISTICS (refer to the test circuit, V = 14. 4V, C = 47μF, ESR < 10Ω,i oR = 1K ..
L4947H ,5V-0.5A VERY LOW DROP REGULATOR WITH RESETL4947L4947R®5V-0.5A VERY LOW DROP REGULATOR WITH RESETPRECISE OUTPUT VOLTAGE (5V ± 4%)OVER FULL TEM ..
L4947L ,5V-0.5A VERY LOW DROP REGULATOR WITH RESETABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV DC Input Voltage 35 ViDC Reverse Input Voltage ..
L4947PD ,5V-0.5A VERY LOW DROP REGULATOR WITH RESETABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV DC Input Voltage 35 ViDC Reverse Input Voltage ..
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L4943
MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
gerTpra'
MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
n 3 PROGRAMMABLE OUTPUTS:
o 3 TO 11V (500mA);
. 3 TO 11V (500mA);
o 3 TO 7V (500mA) STANDBY
n OUT1 AND OUT2 WITH INDEPENDENT EN-
ABLE CONTROL FOR STAND-BY MODE
n 0.4A HIGH SIDE DRIVER
a LOAD DUMP PROTECTION
n THERMAL SHUTDOWN
DESCRIPTION
The L4943 contains a triple voltage regulator and
a high side driver.
In stand-by the output is active as long as possi-
ble even when in thermal shutdown or under any
other fault conditions.
The STCAP pin allows the use of a reserve sup-
ply capacitor that will hold enough energy for the
BLOCK DIAGRAM
Multiwatt 15
ORDERING NUMBER: L4943
5V Stand-by line to allow the WP to store data.
FILTER CAP
ST CAP o- GEN REF ._),/t,ssg 10 MEM
(3-:7)V 0.5A VMEM feed
‘1 \ 7 f
EN1 t) 'r/ VAD“ £1 VADM
(3+1 1)V 0.5A VADJ1_feed
2 V :3 VADJ2
EN2 <>— t = ADJ2 14
A (3-: 11)V 0.5A I VADJ2_feed
VS t) 4
HSD -o HSD
DUMP 6 8
pfa’ND fi(B D97AU668B
December 2000
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Vs DC Operating Supply Voltage -0.6 to 30 V
Transient Supply Overvoltage (50ms) 50 V
lo Voltage Regulator Output Current Internally limited
Vin Input Voltage (EN1, EN2) 0 to 6 V
RESR Output Capacitor Series Eq. Resistance 0.2 to 10 Q
Ptot Power Dissipation (Tcase = 85°C) 33 W
Top Operating Temperature Range -40 to 85 ''C
Tstg Storage Temperature Ranges -55 to 150 ''C
PIN CONNECTION (t.b.d.)
15 FILTER CAP
14 V2 feed
13 v, feed
12 ST CAP
11 VMEM
10 VMEMJeed
6 P-GND
(y 3 S-GND
A TAB CONNECTED TO PIN 8 D97AU674A
THERMAL DATA
Symbol Parameter Value Unit
Rm j-case Thermal Resistance Junction to Case 2 "C/W
