FAN1581M Fairchild Semiconductor, FAN1581M Datasheet
FAN1581M
Manufacturer Part Number
FAN1581M
Description
Manufacturer
Fairchild Semiconductor
Datasheet
1.FAN1581M.pdf
(13 pages)
Specifications of FAN1581M
Date_code
08+
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FAN1581M12
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FAN1581M12X
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FAN1581M15X
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FAN1581MX
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Features
• Ultra Low dropout voltage, 0.4V typical at 5A
• 1.2V Versions available
• Remote sense operation
• Fast transient response
• Load regulation: 0.05% typical
• 0.5% initial accuracy
• On-chip thermal limiting
• 5-pin SPAK, TO-263, TO-252 and TO-220 packages
Applications
• Pentium
• PowerPC
• Pentium support of GTL+ bus supply
• Low voltage logic supply
• Embedded Processor supplies
• Split plane regulator
• New 2.5V and 1.8V Logic Families
• DDR Termination Supply
Typical Applications
Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
FAN1581
5A Adjustable/Fixed Ultra Low Dropout
Linear Regulator
V
V
V
V
CNTL
CNTL
IN
IN
= 3.3V
= 3.3V
= 5V
= 5V
10 F
10 F
1 F
1 F
®
™
Processors
+
+
+
+
, AMD K5 and K6 processors
V
V
V
V
FAN1581M12
CNTL
CNTL
IN
IN
FAN1581
Adj
Adj
V
V
SENSE
SENSE
V
V
OUT
OUT
86.6
124
120
+
22 F
22 F
2.1V at 5A
1.2V at 5A
V
V
V
CNTL
Description
The FAN1581, FAN1581x12, 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
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
V
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
SPAK, TO-263, TO-252 and TO-220 packages.
V
CNTL
IN
IN
TT
= 5.75V
= 3.3V
= 12V
= 5V
termination. Additionally, the FAN1581x12 offers fixed
10 F
10 F
1 F
1 F
+
+
+
+
V
V
V
V
FAN1581–2.5
IN
CNTL
IN
CNTL
FAN1581
GND
Adj
V
V
SENSE
SENSE
V
V
OUT
OUT
TT
www.fairchildsemi.com
bus termination, where tran-
124
374
REV. 1.1.8 4/7/03
+
+
22 F
22 F
2.5V at 5A
5V at 5A
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