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 ..
L4947PD ,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 ..
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L4946B
QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET
L4946BQUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET
4 OUTPUTS: 10V (125mA); 8.5V (250mA); 5V
(200mA); 5V (100mA)
10V AND 5V (100mA) OUTPUT 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
DESCRIPTIONThe L4946B is a quad output low drop voltage
regulator. The four outputs are a low drop 10V at
125mA (VO1), a 8.5V at 250mA (VO2), a 5V at
200mA (VO3) and a low drop 5V st-by line at
100mA (VO4).
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-
cay slowly giving the μP time to store data. This
IC is designed for supplying microcomputer con-
trolled systems specially in automotive applica-
tions.
BLOCK DIAGRAM
OPERATING CONDITION
THERMAL DATA
PIN CONNECTION
ABSOLUTE MAXIMUM RATINGS
APPLICATION CIRCUIT
L4946
ELECTRICAL CHARACTERISTICS (VS = 10.5 to 16V; IO1 = 6mA, IO2 = 8mA, IO3 = 4mA; IO4 = 0.4mA;CO = 10μF max; Tamb = -40 to 85°C, unless otherwise specified.)
L49463/9
ELECTRICAL CHARACTERISTICS (continued)
L4946
ELECTRICAL CHARACTERISTICS (continued)
Note 1:The L4946 has "Foldback" on its outputs during current limiting. As the output loading is increasing the current supplied by the L4946 increases
until a threshold is reached. When the current limiting threshold is reached, the L4946 output current will start to accrease as the loading is
continuoing to increase. The point where the output current stort to decrease is the maximum output current.
L49465/9
