L4946B 데이터 시트보기 (PDF) - STMicroelectronics

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L4946B

QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET

STMicroelectronics 

®

L4946B

QUAD 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

DESCRIPTION

The 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.

BLOCK DIAGRAM

MULTIPOWER BCD TECHNOLOGY

Multiwatt 11

ORDERING NUMBER: L4946B

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.

L4946B

125mA

8.5V 250mA

200mA

June 2000

1/9

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