Product Summary

The L4949 is a monolithic integrated 5V voltage regulator with a very low dropout output and additional functions as power-on reset and input voltage sense. The L4949 is designed for supplying the microcomputer controlled systems especially in automotive applications.

Parametrics

L4949 absolute maximum ratings: (1)DC Operating Supply Voltage: 28 V; (2)VSTR Transient Supply Voltage (T < 1s): 40 V; (3)IO Output Current: Internally Limited; (4)VO Output Voltage: 20 V; (5)VRES, VSO Output Voltage: 20 V; (6)IRES, ISO Output Current: 5 mA; (7)VZ Preregulator Output Voltage: 7 V; (8)IZ Preregulator Output Current: 5 mA; (9)TJ Junction Temperature: -40 to +150 ℃; (10)Tstg Storage Temperature Range: -55 to +150 ℃.

Features

L4949 features: (1)Operating dc supply voltage range 5V - 28V; (2)Transient supply voltage up to 40V; (3)Extremely low quiescent current in standby mode; (4)High precision standby output voltage 5V±1%; (5)Output current capability up to 100mA; (6)Very low dropout voltage less than 0.5V; (7)Reset circuit sensing the output voltage; (8)Programmable reset pulse delay with external capacitor voltagesensecomparator; (9)Thermal shutdown and short circuit protections.

Diagrams

L4949 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
L4949
L4949

Other


Data Sheet

Negotiable 
L4949D
L4949D

ON Semiconductor

Low Dropout (LDO) Regulators 5V 100mA w/Power-On

Data Sheet

Negotiable 
L4949DG
L4949DG

ON Semiconductor

Low Dropout (LDO) Regulators 5V 100mA w/Power-On Reset

Data Sheet

Negotiable 
L4949DR2
L4949DR2

ON Semiconductor

Low Dropout (LDO) Regulators 5V 100mA w/Power-On

Data Sheet

Negotiable 
L4949DR2G
L4949DR2G

ON Semiconductor

Low Dropout (LDO) Regulators 5V 100mA w/Power-On Reset

Data Sheet

Negotiable 
L4949E
L4949E

STMicroelectronics

Low Dropout (LDO) Regulators 5V Multifunction LDO

Data Sheet

Negotiable 
L4949ED
L4949ED

STMicroelectronics

Low Dropout (LDO) Regulators 5V Multifunction LDO

Data Sheet

0-980: $0.46
980-1000: $0.36
1000-2000: $0.31
2000-5000: $0.28
L4949ED013TR
L4949ED013TR

STMicroelectronics

Low Dropout (LDO) Regulators 5V Multifunction LDO

Data Sheet

0-1: $0.56
1-10: $0.52
10-100: $0.43
100-250: $0.41