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PDF FAN1587AT33 Data sheet ( Hoja de datos )

Número de pieza FAN1587AT33
Descripción 3A Adjustable/Fixed Low Dropout Linear Regulator
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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FAN1587A
3A Adjustable/Fixed Low Dropout Linear Regulator
Features
• Fast transient response
• Low dropout voltage at up to 3A
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard TO-220, TO-263, TO-263 center cut,
and TO-252 packages
Applications
• Pentium® Class GTL+ bus supply
• Low voltage logic supply
• Post regulator for switching supply
• 12V to 5V linear regulator
• 3.3V to 1.5V linear regulator
Description
The FAN1587A, FAN1587A-1.5, and FAN1587A-3.3 are low
dropout three-terminal regulators with 3A output current capa-
bility. These devices have been optimized for low voltage
applications including VTT bus termination, where transient
response and minimum input voltage are critical. The
FAN1587A is ideal for low voltage microprocessor applica-
tions requiring a regulated output from 1.5V to 3.6V with an
input supply of 12V or less. The FAN1587A-1.5 offers fixed
1.5V with 3A current capability for GTL+ bus VTT termina-
tion. The FAN1587A-3.3 offers fixed 3.3V current capability
for logic IC operation.
Current limit is trimmed to ensure specified output current and
controlled short-circuit current. On-chip thermal limiting pro-
vides protection against any combination of overload and
ambient temperature that would create excessive junction
temperatures.
The FAN1587A, FAN1587A-1.5, and FAN1587A-3.3 are
available in the industry-standard TO-220, TO-263, TO-263
center cut, and TO-252 (DPAK) power packages.
Typical Applications
VIN = 12V
22µF
+
FAN1587A
VIN VOUT
ADJ
VOUT = VREF (1+R2/R1)+IADJ*R2
VIN = 9V
22µF
+
FAN1587A-3.3
VIN VOUT
GND
R1
124
R2
768
9V at 3A
+
22µF
3.3V at 3A
+
22µF
65-1587-16
Pentium is a registered trademark of Intel Corporation.
REV. 1.0.5 11/10/03

1 page




FAN1587AT33 pdf
FAN1587A
Typical Performance Characteristics
1.5
1.4
1.3
1.2
1.1
1.0 T=0°C
0.9
T=25°C
0.8
T=125°C
0.7
0.6
0.5
0
0.5 1 1.5 2
2.5
OUTPUT CURRENT (A)
3.0
Figure 2. Dropout Voltage vs. Output Current
1.275
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
1.230
1.225
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 4. Reference Voltage vs. Temperature
5
4
3
2
1
0
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 6. Minimum Load Current vs. Temperature
PRODUCT SPECIFICATION
0.10
I = 3A
0.05
0
-0.05
-0.10
-0.15
-0.20
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 3. Load Regulation vs. Temperature
3.70
VOUT SET WITH 1% RESISTORS
3.65
VOUT = 3.6V1
3.60
3.55
3.50
3.45
3.40
3.35
VOUT = 3.3V2
3.30
3.25
Note:
1. FAN1587A Only
3.20
2. FAN1587A, -3.3
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 5. Output Voltage vs. Temperature
100
Note:
90 1. FAN1587A Only
80
70
60
50
40
30
20
10
0
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 7. Adjust Pin Current vs. Temperature
5 REV. 1.0.5 11/10/03

5 Page





FAN1587AT33 arduino
PRODUCT SPECIFICATION
FAN1587A
Mechanical Dimensions (continued)
3-Lead TO-263 Center Cut Package
Symbol
A
b
b2
c2
D
E
e
L
L1
L2
L3
R
α
Inches
Min. Max.
.160 .190
.020 .036
.049 .051
.045 .055
.340 .380
.380 .405
.100 BSC
.575 .625
.090 .110
.055
.050 .070
.017 .019
0° 8°
Millimeters
Min. Max.
4.06 4.83
0.51 0.91
1.25 1.30
1.14 1.40
8.64 9.65
9.65 10.29
2.54 BSC
14.61 15.88
2.29 2.79
1.40
1.27 1.78
0.43 0.78
0° 8°
Notes
Notes:
1. Dimensions are exclusive of mold flash and metal burrs.
2. Standoff-height is measured from lead tip with ref. to Datum -B-.
3. Foot length is measured with ref. to Datum -A- with lead surface
(at inner R).
4. Dimensiuon exclusive of dambar protrusion or intrusion.
5. Formed leads to be planar with respect to one another at seating
place -C-.
E
@PKG/
@HEATSINK
L2
D
L
E-PIN
b2
L3
b
e
A
-C-
c2
R (2 PLCS)
L1
-B- -A-
REV. 1.0.5 11/10/03
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