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Numéro de référence | NCV4949 | ||
Description | Low Dropout Voltage Regulator | ||
Fabricant | ON Semiconductor | ||
Logo | |||
1 Page
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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
June, 2006 − Rev. 9
1
Publication Order Number:
L4949/D
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Pages | Pages 10 | ||
Télécharger | [ NCV4949 ] |
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