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FAN1581 Fiches technique(PDF) 1 Page - Fairchild Semiconductor

No de pièce FAN1581
Description  5A Adjustable/Fixed Ultra Low Dropout Linear Regulator
Download  13 Pages
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN1581 Fiches technique(HTML) 1 Page - Fairchild Semiconductor

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www.fairchildsemi.com
Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
REV. 1.2.0 11/6/03
Features
• 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
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 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 VTT 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 fixed 1.5V with 5A current capabilities for GTL+ bus
VTT termination. Additionally, the FAN1581-1.2 offers fixed
1.2V output for CPU Bus termination. The FAN1581-2.5
offers fixed 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.
Typical Applications
22
µF
22
µF
VCNTL = 5V
2.1V at 5A
10
µF
VIN = 3.3V
+
10
µF
+
+
VIN
VSENSE
VCNTL
Adj
VOUT
FAN1581
22
µF
VCNTL = 5V
2.5V at 5A
10
µF
VIN = 3.3V
+
1
µF
+
1
µF
+
1
µF
+
1
µF
+
+
VIN
VSENSE
VCNTL
GND
VOUT
FAN1581–2.5
86.6
124
VCNTL = 5V
1.2V at 5A
VIN = 3.3V
VIN
VSENSE
VCNTL
Gnd
VOUT
FAN1581-1.2
22
µF
VCNTL = 12V
5V at 5A
10
µF
VIN = 5.75V
+
+
VIN
VSENSE
VCNTL
Adj
VOUT
FAN1581
374
124
FAN1581
5A Adjustable/Fixed Ultra Low Dropout
Linear Regulator


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