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PDF NCV4949 Data sheet ( Hoja de datos )
| Número de pieza | NCV4949 | |
| Descripción | Low Dropout Voltage Regulator | |
| Fabricantes | ON Semiconductor | |
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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
1 page  
L4949, NCV4949
TYPICAL CHARACTERIZATION CURVES (continued)
6.0
TJ = 25°C
5.0
Resistor 10 k
4.0 from Reset Output
to 5.0 V
3.0
2.0
1.0
0
4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0
Vout, OUTPUT VOLTAGE (V)
Figure 8. Reset Output versus
Regulator Output Voltage
4.7
4.66
Upper Threshold
4.62
4.58
4.54
4.5 Lower Threshold
4.46
4.42
−40
−20 0 20 40 60 80 100
TJ, JUNCTION TEMPERATURE (°C)
Figure 9. Reset Thresholds versus
Junction Temperature
120
6.0
5.0 TJ = 25°C
4.0 Resistor 10 k
from Sense Output
3.0 to 5.0 V
2.0
1.0
0
1.0 1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5
VSI, SENSE INPUT VOLTAGE (V)
Figure 10. Sense Output versus
Sense Input Voltage
1.4
1.38
1.36
1.34
1.32
1.3
1.28
1.26
1.24
1.22
1.2
−40
Upper Threshold
Lower Threshold
−20 0 20 40 60 80 100
TJ, JUNCTION TEMPERATURE (°C)
Figure 11. Sense Thresholds versus
Junction Temperature
120
http://onsemi.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet NCV4949.PDF ] | |
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