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PDF SPX2941 Data sheet ( Hoja de datos )
| Número de pieza | SPX2941 | |
| Descripción | Low Dropout Voltage Regulator | |
| Fabricantes | Sipex Corporation | |
| Logotipo |  |
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®
SPX2941
1A Low Dropout Voltage Regulator,
Adjustable Output, Fast Response
FEATURES
■ Adjustable Output Down To 1.25V
■ Low Quiescent Current
■ Guaranteed 1.5A Peak Output Current
■ Low Dropout Voltage of 280mV @ 1A
■ Extremely Tight Load and Line
Regulation
■ Extremely Fast Transient Response
■ Reverse-battery Protection
■ Internal Thermal and Current Limit
Protection
■ Zero Current Shutdown
■ Error Flag Output for Out of Regulation
State
■ Standard TO-220 and TO-263
packages
■ Replacement for LM2941 and AS2941
SPX2941
5 Pin TO-263
1 2345
Now Available in Lead Free Packaging
APPLICATIONS
■ Powering VGA & Sound Card
■ LCD Monitors
■ USB Power Supply
■ Power PC Supplies
■ SMPS Post-Regulator
■ High Efficiency Linear Power Supplies
■ Battery Charger
■ Portable Instrumentation
■ Constant Current Regulators
■ Adjustable Power Supplies
DESCRIPTION
The SPX2941 is a 1A, accurate voltage regulator with a low drop out voltage of 280mV(typ.) at
1A. These regulators are specifically designed for low voltage applications that require a low
dropout voltage and a fast transient response. They are fully fault protected against over-current,
reverse battery, and positive and negative voltage transients. Other features include Enable, and
Error Flag. The SPX2941 is offered in 5-pin TO-220 & TO-263 packages. For a 3A version, refer
to the SPX29300 data sheet.
TYPICAL APPLICATIONS CIRCUIT
VIN
6.8µF +
45
EN
SPX2941
2
31
VOUT
+
R1 10µF
GND ADJ
R2
Figure 1. Adjustable Output Linear Regulator
Date: 08/25/04
SPX2941 1A Low Dropout Voltage Regulator
1
© Copyright 2004 Sipex Corporation
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
280
270
260
250
240
230
220
210
200
190
180
-40
-20
0
3.3V Device
VIN = 4.3V
IL = 10mA
CL = 10µF
20 40 60 80
Temperature (°C)
100 120
Figure 9. Ground Current vs Temperature at ILOAD=10mA
3.320
3.310
3.300
3.290
3.280
3.270
3.260
3.250
3.240
3.230
3.220
-40
-20
0
3.3V Device
VIN = 4.3V
IL = 10mA
CL = 10µF
20 40 60 80
Temperature (°C)
100 120
Figure 10. Output Voltage vs Temperature at ILOAD=10mA
7.00
6.80
6.60
6.40
6.20
3.3V Device
VIN = 4.3V
IL = 500mA
CL = 10µF
6.00
5.80
5.60
5.40
5.20
5.00
-40 -20
0
20
40 60 80 100 120
Temperature (°C)
30
29
28
27
26
25
24
23
22
21
20
-40
-20
0
3.3V Device
VIN = 3.2V
IL = 750mA
CL = 10µF
20 40 60 80
Temperature (°C)
100 120
Figure 11. Ground Current vs Temperature at ILOAD=500mA Figure 12. Ground Current vs Temperature in Dropout
at ILOAD=750mA
52.0
50.0
48.0
46.0
44.0
42.0
40.0
38.0
36.0
-40
-20
0
3.3V Device
VIN = 4.3V
IL = 1.5A
CL = 10µF
20 40 60 80
Temperature (°C)
100 120
100
95
90
85
80
75
70
-40
3.3V Device
VIN = 3.2V
IL = 1.5A
CL = 10µF
-20 0
20 40 60 80
Temperature (°C)
100 120
Figure 13. Ground Current vs Temperature at I =1.5A
LOAD
Figure 14. Ground Current vs Temperature in Dropout at
ILOAD=1.5A
Date: 08/25/04
SPX2941 1A Low Dropout Voltage Regulator
5
© Copyright 2004 Sipex Corporation
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet SPX2941.PDF ] | |
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