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L4949D View Datasheet(PDF) - ON Semiconductor

Part NameDescriptionManufacturer
L4949D 100 mA, 5.0 V, Low Dropout Voltage Regulator with Power−On Reset ON-Semiconductor
ON Semiconductor ON-Semiconductor
L4949D Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
L4949, NCV4949
100 mA, 5.0 V, Low Dropout
Voltage Regulator with
Power−On Reset
The L4949 is a monolithic integrated 5.0 V voltage regulator with a
very low dropout and additional functions such as power−on reset and
input voltage sense.
It is designed for supplying the micro−computer controlled systems
especially 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 Standby 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 With External Capacitor
Voltage Sense Comparator
Thermal Shutdown and Short Circuit Protections
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
Pb−Free Packages are Available
Supply
Voltage (VCC)
1
Output
Voltage (Vout)
VZ 3
8
CT 4
Preregulator
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
MARKING DIAGRAMS
8
1
PDIP−8
N SUFFIX
CASE 626
8
L4949N
AWL
YYWWG
1
8
1
SOIC−8
D SUFFIX
CASE 751
8
L4949
ALYWD
G
1
20
20
1
SOIC−20W
DW SUFFIX
CASE 751D
1
L4949DW
AWLYYWWG
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Device
PIN CONNECTIONS
VCC 1
Si 2
VZ 3
CT 4
8 Vout
7 So
6 Reset
5 GND
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
© Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 9
Publication Order Number:
L4949/D
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