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FAN1587AM33X Schematic ( PDF Datasheet ) - Fairchild Semiconductor

Teilenummer FAN1587AM33X
Beschreibung 3A Adjustable/Fixed Low Dropout Linear Regulator
Hersteller Fairchild Semiconductor
Logo Fairchild Semiconductor Logo 




Gesamt 14 Seiten
FAN1587AM33X Datasheet, Funktion
www.fairchildsemi.com
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






FAN1587AM33X Datasheet, Funktion
PRODUCT SPECIFICATION
FAN1587A
Typical Performance Characteristics (continued)
5.0
4.5
4.0
3.5
3.0
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 8. Short-Circuit Current vs. Temperature
90
80
70
60
50
40
30
20 (VIN VOUT) 3V
0.5V VRIPPLE 2V
10 IOUT = 3A
0
10 100
1K
10K 100K
FREQUENCY (Hz)
Figure 9. Ripple Rejection vs. Frequency
20
15
10
5
0
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (°C)
Figure 10. Maximum Power Dissipation
2.5
2
1.5
Area of Instability
1
0.5
0
0
Stable Area
1000
2000
3000
LOAD CURRENT (mA)
Figure 11. Stability Region VIN/VOUT = 5V/1.5V
REV. 1.0.5 11/10/03
6

6 Page









FAN1587AM33X pdf, datenblatt
PRODUCT SPECIFICATION
Mechanical Dimensions (continued)
3-Lead TO-220 Package
Symbol
A
b
b1
c1
øP
D
E
e
e1
e3
F
H1
J1
L
L1
Q
α
Inches
Min. Max.
.140 .190
.015 .040
.045 .070
.014 .022
.139 .161
.560 .650
.380 .420
.090 .110
.190 .210
.045
.020 .055
.230 .270
.080 .115
.500 .580
.250 BSC
.100 .135
3° 7°
Millimeters
Min. Max.
3.56 4.83
.38 1.02
1.14 1.78
.36 .56
3.53 4.09
14.22 16.51
9.65 10.67
2.29 2.79
4.83 5.33
1.14
.51 1.40
5.94 6.87
2.04 2.92
12.70 14.73
6.35 BSC
2.54 3.43
3° 7°
Notes
Notes:
1. Dimension c1 apply for lead finish.
e
e1
L
e3 b1
b
L1
H1
Q
E
E-PIN øP
c1
J1
α (5X)
D
A
FAN1587A
F
REV. 1.0.5 11/10/03
12

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