Product Summary

The L4949ED 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 L4949ED is designed for supplying the microcomputer controlled systems especially in automotive applications.

Parametrics

L4949ED absolute maximum ratings: (1)VSDC 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

L4949ED 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

L4949ED block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
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
L4949ED-E
L4949ED-E

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
L4949EDMITTR
L4949EDMITTR

STMicroelectronics

Low Dropout (LDO) Regulators BODY SMARTPOWER

Data Sheet

0-1840: $0.42
1840-2500: $0.41
2500-5000: $0.40
5000-10000: $0.38
L4949EDTR-E
L4949EDTR-E

STMicroelectronics

Low Dropout (LDO) Regulators 5V MULTIFUNCTION LDO

Data Sheet

0-1700: $0.33
1700-2500: $0.31
2500-5000: $0.28
5000-10000: $0.28
L4949EDTRWTR
L4949EDTRWTR

STMicroelectronics

Low Dropout (LDO) Regulators BODY SMARTPOWER

Data Sheet

0-1840: $0.42
1840-2500: $0.41
2500-5000: $0.40
5000-10000: $0.38