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L4949_06 Datasheet, PDF (1/10 Pages) ON Semiconductor – 100 mA, 5.0 V, Low Dropout Voltage Regulator with Power−On Reset | |||
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L4949, NCV4949
100 mA, 5.0 V, Low Dropout
Voltage Regulator with
PowerâOn Reset
The L4949 is a monolithic integrated 5.0 V voltage regulator with a
very low dropout and additional functions such as powerâon reset and
input voltage sense.
It is designed for supplying the microâcomputer 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
⢠PbâFree 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
+
â 2.0 V
+
â
Sense
1.23 V
5 GND
Figure 1. Representative Block Diagram
Reset
6
Sense
Output
(So)
7
http://onsemi.com
MARKING DIAGRAMS
8
1
PDIPâ8
N SUFFIX
CASE 626
8
L4949N
AWL
YYWWG
1
8
1
SOICâ8
D SUFFIX
CASE 751
8
L4949
ALYWD
G
1
20
20
1
SOICâ20W
DW SUFFIX
CASE 751D
1
L4949DW
AWLYYWWG
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = PbâFree 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 â Rev. 9
Publication Order Number:
L4949/D
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