鈥?/div>
Ultra Low dropout voltage, 0.4V typical at 5A
1.2V Versions available for GTL termination
Remote sense operation
Fast transient response
Load regulation: 0.05% typical
0.5% typical initial accuracy
On-chip thermal limiting
TO-263, TO-252 and TO-220 packages
Description
The FAN1581, FAN1581-1.2, FAN1581-1.5, and FAN1581-
2.5 are ultra-low dropout regulators with 5A output current
capability. These devices have been optimized for low volt-
age applications including V
TT
bus termination, where tran-
sient response and minimum input voltage are critical. The
FAN1581 is ideal for low voltage microprocessor applica-
tions requiring a regulated output from 1.3V to 5.7V with a
power input supply of 1.75V to 6.5V. The FAN1581-1.5
offers 铿亁ed 1.5V with 5A current capabilities for GTL+ bus
V
TT
termination. Additionally, the FAN1581-1.2 offers 铿亁ed
1.2V output for CPU Bus termination. The FAN1581-2.5
offers 铿亁ed 2.5V with 5A 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 FAN1581 series regulators are available in the 5-pin
TO-263, TO-252 and TO-220 packages.
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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
Typical Applications
V
IN
= 3.3V
+
10碌F
V
IN
= 3.3V
+
10碌F
V
CNTL
= 5V
+
1碌F
V
CNTL
= 5V
+
1碌F
2.1V at 5A
+
124鈩?/div>
22碌F
V
IN
= 5.75V
+
86.6鈩?/div>
10碌F
V
CNTL
= 12V
+
V
IN
= 3.3V
+
10碌F
V
CNTL
= 5V
+
1碌F
V
IN
V
SENSE
1碌F
V
IN
V
SENSE
V
IN
V
SENSE
FAN1581鈥?.5
V
OUT
V
CNTL
GND
2.5V at 5A
+
22碌F
V
IN
V
SENSE
FAN1581
V
OUT
V
CNTL
Adj
FAN1581
V
OUT
V
CNTL
Adj
124鈩?/div>
+
22碌F
5V at 5A
FAN1581-1.2
V
OUT
V
CNTL
Gnd
374鈩?/div>
1.2V at 5A
22碌F
Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
REV. 1.2.0 11/6/03
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