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FAN1581

Part Number	FAN1581
Manufacturer	Fairchild Semiconductor
Description	5A Adjustable/Fixed Ultra Low Dropout Linear Regulator
Published	Mar 30, 2005
Detailed Description	www.fairchildsemi.com FAN1581 5A Adjustable/Fixed Ultra Low Dropout Linear Regulator Features • • • • • • • • Ultra Low...
Datasheet	FAN1581 PDF File

Overview

www.
fairchildsemi.
com FAN1581 5A Adjustable/Fixed Ultra Low Dropout Linear Regulator 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 Description The FAN1581, FAN1581x12, FAN1581-1.
5, and FAN15812.
5 are ultra-low dropout regulators with 5A 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 FAN1581 is ideal for low voltage microprocessor applications 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 FAN1581x12 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 excessive junction temperatures.
The FAN1581 series regulators are available in the 5-pin SPAK, TO-263, TO-252 and TO-220 packages.
Applications • • • • • • • • Pentium® Processors PowerPC™, AMD K5 and K6 processors 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 VIN = 3.
3V 10µF VIN = 3.
3V 10µF VCNTL = 5V 1µF + + VIN VSENSE VCNTL = 5V 1µF 2.
1V at 5A + 124Ω 86.
6Ω 22µF VIN = 5.
75V 10µF VCNTL = 12V VIN = 3.
3V 10µF VCNTL = 5V 1µF + + VIN VSENSE 1µF + + VIN VSENSE + + VIN VSENSE FAN1581–2.
5 VOUT VCNTL GND 2.
5V at 5A + 22µF FAN1581 VOUT VCNTL Adj FAN1581 VOUT...

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