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FAN1587A
3A Adjustable/Fixed Low Dropout Linear Regulator
Features
Description
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The FAN1587A, FAN1587A-1.5, and FAN1587A-3.3 are low
dropout three-terminal regulators with 3A output current capability. 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 applications 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 termination. The FAN1587A-3.3 offers fixed 3.3V current capability
for logic IC operation.
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
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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
Current limit is trimmed to ensure specified output current and
controlled short-circuit current. On-chip thermal limiting provides 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
FAN1587A
VIN
VOUT
VIN = 12V
22µF
+
9V at 3A
+
ADJ
R1
124Ω
VOUT = VREF (1+R2/R1)+IADJ*R2
22µF
R2
768Ω
FAN1587A-3.3
VIN
VIN = 9V
+
22µF
VOUT
GND
3.3V at 3A
+
22µF
65-1587-16
Pentium is a registered trademark of Intel Corporation.
REV. 1.0.5 11/10/03
PRODUCT SPECIFICATION
FAN1587A
Absolute Maximum Ratings
Parameter
Min.
Max.
Unit
18
V
VIN
(VIN – VOUT) * IOUT
See Figure 1
0
°C
150
°C
300
Storage Temperature Range
125
-65
Operating Junction Temperature Range
°C
Lead Temperature (Soldering, 10 sec.)
IOUT (Amps)
4
3
2
1
0
0
2
4
6
8
10
12
14
VIN–VOUT (V)
Figure 1. Absolute Maximum Safe Operating Area
REV. 1.0.5 11/10/03
3
