L4943 Datasheet, PDF (1/6 Pages) STMicroelectronics – MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO

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L4943
MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
3 PROGRAMMABLE OUTPUTS:
♦ 3 TO 11V (500mA);
♦ 3 TO 11V (500mA);
♦ 3 TO 7V (500mA) STANDBY
OUT1 AND OUT2 WITH INDEPENDENT EN-
ABLE CONTROL FOR STAND-BY MODE
0.4A HIGH SIDE DRIVER
LOAD DUMP PROTECTION
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 µP to store data.
12
ST CAP
GEN
EN1 ¹
FILTER CAP
REF
2
EN2
V_S ⁵
LOAD
DUMP
6
P-GND
3
S-GND
V_MEM
(3÷7)V 0.5A
11
V_MEM
10
V_{MEM_feed}
7
V_ADJ1
(3÷11)V 0.5A
13
V_ADJ1
V_{ADJ1_feed}
V_ADJ2
9
V_ADJ2
(3÷11)V 0.5A ¹⁴ _{VADJ2_feed}
HSD
4
HSD
8
TAB
D97AU668B
December 2000
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