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PDF SPX29151 Data sheet ( Hoja de datos )
| Número de pieza | SPX29151 | |
| Descripción | 1.5A Low Dropout Voltage Regulator | |
| Fabricantes | Exar | |
| Logotipo |  |
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SPX29150/51/52/53
1.5A Low Dropout Voltage Regulator
FEATURES
■ Adjustable Output Down to 1.25V
■ 1% Output Accuracy
■ Output Current of 1.5A
■ Low Dropout Voltage of 390mV @ 1.5A
■ Extremely Tight Load and Line
Regulation
■ Extremely Fast Transient Response
■ Reverse-Battery Protection
■ Zero Current Shutdown (5 pin version)
■ Error Flag Signal Output for Out of
Regulation State (5 pin version)
■ Standard TO-220 and TO-263
Packages
APPLICATIONS
■ Powering VGA and Sound Cards
■ LCD Monitors
■ USB Power Supplies
■ PowerPC™ Supplies
■ SMPS Post Regulators
■ High-efficiency “Green” Computer
Systems
■ High-efficiency Linear Power Supplies
■ Portable Instrumentation
■ Constant Current Regulators
■ Adjustable Power Supplies
■ Battery Chargers
DESCRIPTION
The SPX29150/51/52/53 are 1.5A, highly accurate voltage regulators with a low dropout
voltage of 390mV (typical) @ 1.5A. These regulators are specifically designed for low volt-
age 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. On-chip trimming adjusts the reference voltage to 1% initial accuracy. Other
features in the 5 pin versions include Enable and Error Flag.
The SPX29150/51/52/53 is offered in 3-pin and 5-pin TO-220 & TO-263 packages. For a 3A
version, refer to the SPX29300 data sheet.
TYPICAL APPLICATION CIRCUITs
VIN
+
6.8µ F
1 SPX29150 3
2
VOUT
+ 10µ F
VIN
+
6.8µ F
1 SPX29152 4
2
3
GND
5
ADJ
VOUT
+
R1
10µ F
R2
Figure 1. Fixed Output Linear Regulator
Figure 2. Adjustable Output Linear Regulator
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
1
© Copyright 2008 Exar Corporation
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
280
270
260
250
240
230
220
210 3.3V Device
Vin = 4.3V
200 IL = 10mA
190 CL = 10uF
180
-40 -20 0 20 40 60 80 100 120
Temperature (oC)
Figure 9. Ground Current vs Temperature
at ILOAD=10mA
7.00
6.80
6.60
3.3V Device
Vin = 4.3V
6.40 IL = 500mA
6.20 CL = 10uF
6.00
5.80
5.60
5.40
5.20
5.00
-40 -20 0 20 40 60 80 100 120
Temperature (oC)
Figure 11. Ground Current vs Temperature at
ILOAD=500mA
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 = 10uF
20 40 60 80 100 120
Temperature (oC)
Figure 13. Ground Current vs Temperature at
ILOAD=1.5A
3.320
3.310
3.300
3.290
3.280
3.270
3.260
3.250
3.240
3.230
3.3V Device
Vin = 4.3V
IL = 10mA
CL = 10uF
3.220
-40
-20
0
20 40 60 80
Temperature (oC)
100 120
Figure 10. Output Voltage vs Temperature at
ILOAD=10mA
30
29
3.3V Device
28 Vin = 3.2V
27 IL = 750mA
26 CL = 10µF
25
24
23
22
21
20
-40 -20
0
20 40
60 80
100 120
Temperature (oC)
Figure 12. Ground Current vs Temperature in
Dropout at ILOAD=750mA
100
95
90
85
3.3V Device
80 Vin = 3.2V
IL = 1.5A
75 CL = 10µF
70
-40
-20
0
20 40 60
Temperature ( oC)
80 100 120
Figure 14. Ground Current vs Temperature in
Dropout at ILOAD=1.5A
REV B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
© Copyright 2008 Exar Corporation
5 Page 
Package: 3 Pin TO-220
Rev B 06/05/08
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
11
© Copyright 2008 Exar Corporation
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet SPX29151.PDF ] | |
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