www.fairchildsemi.com
Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
REV. 1.1.3 11/9/03
Features
• Ultra Low dropout voltage, 0.4V typical at 3A
• Remote sense operation
• Fast transient response
• Load regulation: 0.05% typical
• 0.5% initial accuracy
• On-chip thermal limiting
• 5-Pin TO-252 DPAK, and TO-263 packages
Applications
• Support of GTL+ bus supply
• Low voltage logic supply
• Embedded Processor supplies
• Split plane regulator
• 2.5V, and 1.8V Logic Families
• DDR Termination Supply
Description
The FAN1582, FAN1582-1.5, and FAN1582-2.5 are ultra-low
dropout regulators with 3A output current capability. These
devices have been optimized for low voltage applications
including V
TT
bus termination, where transient response and
minimum input voltage are critical. The FAN1582 is ideal
for low voltage microprocessor applications requiring a reg-
ulated output from 1.3V to 5.7V with a power input supply
of 1.75V to 6.5V. The FAN1582-1.5 offers fixed 1.5V with
3A current capabilities for GTL+ bus V
TT
termination. The
FAN1582-2.5 offers fixed 2.5V with 3A current capability
for logic IC operation and processors while minimizing the
overall power dissipation.
Current limit ensures controlled short-circuit current. On-chip
thermal limiting provides protection against any combination
of overload and ambient temperature that would create exces-
sive junction temperatures.
The FAN1582 series regulators are available in the 5-Pin
TO-252 DPAK, and TO-263 power packages.
Typical Applications
22µF
V
CNTL
= 5V
2.1V at 3A
10µF
V
IN
= 3.3V
+
+
V
IN
V
SENSE
V
CNTL
Adj
V
OUT
FAN1582
22µF
V
CNTL
= 5V
2.5V at 3A
10µF
V
IN
= 3.3V
+
1µF
+
+
V
IN
V
SENSE
V
CNTL
GND
V
OUT
FAN1582–2.5
86.6Ω
124Ω
22µF
V
CNTL
= 12V
5V at 3A
10µF
V
IN
= 5.75V
+
+
V
IN
V
SENSE
V
CNTL
Adj
V
OUT
FAN1582
374Ω
124Ω
FAN1582
3A Adjustable/Fixed Ultra Low Dropout
Linear Regulator
