L4949, NCV4949
100 mA, 5.0 V, Low Dropout Voltage Regulator with Reset and Sense
The L4949 is a monolithic integrated 5...
L4949, NCV4949
100 mA, 5.0 V, Low Dropout Voltage
Regulator with Reset and Sense
The L4949 is a monolithic integrated 5.0 V voltage
regulator with a very low dropout and additional functions such as reset and an uncommitted voltage sense comparator.
It is designed for supplying microcontroller/microprocessor controlled systems particularly in automotive applications.
Features
Operating DC Supply Voltage Range 5.0 V to 28 V Transient Supply Voltage Up to 40 V Extremely Low Quiescent Current in Standby Mode High Precision Output Voltage 5.0 V ±1% Output Current Capability Up to 100 mA Very Low Dropout Voltage Less Than 0.4 V Reset Circuit Sensing The Output Voltage Programmable Reset Pulse Delay Voltage Sense Comparator Thermal Shutdown and Short Circuit Protections NCV Prefix for Automotive and Other Applications Requiring Site
and Change Control
These are Pb−Free Devices
Supply Voltage (VCC)
1
Output
Voltage (Vout)
VZ 3
8
CT 4
Pre
regulator 6.0 V
2.0 mA
Sense Input
(Si)
2
Regulator Vs
1.23 Vref
Reset
+ - 2.0 V
+ Sense
1.23 V
5 GND
Figure 1. Representative Block Diagram
Reset 6
Sense Output (So) 7
http://onsemi.com
8 1
8 1
8 1
MARKING DIAGRAMS 8
PDIP−8 N SUFFIX CASE 626
L4949N AWL
YYWWG
1
8
SOIC−8 D SUFFIX CASE 751
L4949 ALYWD
G
1
8
SOIC−8 EP PD SUFFIX CASE 751AC
V4949 ALYWG
G
1
20
20
1 SOIC−20W DW SUFFIX CASE 751D
L4949DW AWLYYWWG
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = ...