L4948 Datasheet, PDF (1/9 Pages) STMicroelectronics – QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET

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L4948
QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET
4 OUTPUTS: 10V (300mA); 8V (400mA); 5V
(600mA); 5V (100mA)
ALL FOUR OUTPUTS ARE LOW DROP
5V (100mA) ST-BY OUTPUT VOLTAGE
EARLY WARNING OUTPUT FOR SUPPLY
UNDERVOLTAGE (LVW)
THERMAL SHUTDOWN AND CURRENT
LIMITATION (FOLDBACK)
REVERSE BATTERY AND LOAD DUMP
PROTECTION
INHIBIT (ON/OFF) AND RESET FUNCTIONS
DESCRIPTION
The L4948 is a quad output low drop voltage
regulator. All four outputs are low drop: 10V at
300mA (V_O1), 8V at 400mA (V_O2), 5V at 600mA
(V_O3) and a 5V st-by line at 100mA (V_O4).
The IC includes a monitoring circuit to warn if a
low voltage or no voltage condition is occurring.
VO1,2,3 are off during st-by mode.
The STCAP pin allows the battery voltage to de-
BLOCK DIAGRAM
MULTIPOWER BCD TECHNOLOGY
Multiwatt 11
ORDERING NUMBER: L4948
cay slowly giving the µP time to store data. This
IC is designed for supplying microcomputer con-
trolled systems specially in automotive applica-
tions.
June 2000
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