IC REG LDO 5A ADJ VOLT TO-220

 

FAN1581T

Manufacturer Part NumberFAN1581T
DescriptionIC REG LDO 5A ADJ VOLT TO-220
ManufacturerFairchild Semiconductor
FAN1581T datasheets

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Specifications of FAN1581T

Regulator TopologyPositive AdjustableVoltage - Output1.25 ~ 5.7 V
Voltage - InputUp to 7VVoltage - Dropout (typical)0.4V @ 5A
Number Of Regulators1Current - Output5A
Current - Limit (min)5.2AOperating Temperature0°C ~ 125°C
Mounting TypeThrough HolePackage / CaseTO-220-3 (Straight Leads)
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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FAN1581
5A Adjustable/Fixed Ultra Low Dropout Linear Regulator
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
Typical Applications
V
= 3.3V
V
V
IN
IN
SENSE
+
10μF
FAN1581
V
OUT
V
V
= 5V
CNTL
CNTL
+
Adj
124Ω
1μF
86.6Ω
V
= 3.3V
V
V
IN
IN
SENSE
+
10μF
FAN1581-1.2
V
OUT
V
V
= 5V
CNTL
CNTL
+
Gnd
1μF
Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
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
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
termination. Additionally, the FAN1581-1.2 offers fixed
TT
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.
V
= 3.3V
V
IN
IN
+
10μF
FAN1581–2.5
V
V
= 5V
CNTL
CNTL
+
GND
1μF
2.1V at 5A
+
22μF
V
= 5.75V
V
IN
IN
+
10μF
FAN1581
V
V
= 12V
CNTL
CNTL
+
1μF
1.2V at 5A
22μF
www.fairchildsemi.com
bus termination, where tran-
TT
V
SENSE
V
2.5V at 5A
OUT
+
22μF
V
SENSE
V
5V at 5A
OUT
+
22μF
124Ω
Adj
374Ω
REV. 1.2.1 7/2/09

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FAN1581T Summary of contents

  • Page 1

    FAN1581 5A Adjustable/Fixed Ultra Low Dropout Linear Regulator 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% ...

  • Page 2

    ... Plastic TO-252 DPAK Θ =3°C/W* JC Tab is out. Pin Function Descrition V , Control CNTL Current Limit Voltage Loop Amplifier PRODUCT SPECIFICATION FAN1581T FRONT VIEW 5-Lead TO-220 Θ =3°C/W* Tab is VOUT. JC can vary from JA 5 Vin, Power 3 Output 1 Sense 2 Adj REV. 1.2.1 7/2/09 ...

  • Page 3

    PRODUCT SPECIFICATION Absolute Maximum Ratings Parameter CNTL Operating Junction Temperature Range Lead Temperature (Soldering, 10 sec.) Storage Temperature Range Electrical Characteristics T =25° unless otherwise specified. J OUT SENSE ADJ ...

  • Page 4

    FAN1581 Typical Perfomance Characteristics 0.8 0.7 0.6 0.5 0.4 0.3 T=25C T=0C 0.2 0.1 0 OUTPUT CURRENT (A) Dropout Voltage vs. Output Current 1.30 1.28 1.26 1.24 1.22 1.20 -75 -50 - ...

  • Page 5

    PRODUCT SPECIFICATION Typical Perfomance Characteristics (continued) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -75 -50 - 100 125 150 175 JUNCTION TEMPERATURE (C) Control Pin Current vs. Temperature ...

  • Page 6

    FAN1581 General The FAN1581, FAN1581-1.2, FAN1581-1.5, and FAN1581-2.5 are three-terminal regulators optimized for DDR and GTL+ V termination and logic applications. TT These devices are short-circuit protected, and offer thermal shutdown to turn off the regulator when the junction temper- ...

  • Page 7

    PRODUCT SPECIFICATION The current out of the adjust pin adds to the current from R1 and is typically 50µA. Its output voltage contribution is small and only needs consideration when a very precise out- put voltage setting is required. Vcntl ...

  • Page 8

    FAN1581 V = 3.3V IN 10μ CNTL Table 1. Bill of Materials for Application Circuit for the FAN1581 Item Quantity C1 2.5V IN ...

  • Page 9

    ... TO-263 in Tape and Reel FAN1581DX TO-252 DPAK in Tape and Reel FAN1581M12X TO-263 in Tape and Reel FAN1581D15X TO-252 DPAK in Tape and Reel FAN1581M25X TO-263 in Tape and Reel FAN1581D25X TO-252 DPAK in Tape and Reel FAN1581T TO-220 in Tape and Reel REV. 1.2.1 7/2/ SENSE + FAN1581–2.5 V ...

  • Page 10

    PRODUCT SPECIFICATION Mechanical Dimensions 5-Lead TO-263 Package 10.20 9.80 1 (1.28) 1.70 6.80 (8.00) (4.40) (1.75) (0.90) 5 GAGE PLANE R0.56 0.75 0.45 2.84 2.24 SEATING PLANE DETAIL A, ROTATED 90° SCALE: 10X REV. 1.2.1 7/2/09 A 1.40 1.00 9.40 ...

  • Page 11

    FAN1581 Mechanical Dimensions (continued) 5-Lead TO-252 Package 11 PRODUCT SPECIFICATION REV. 1.2.1 7/2/09 ...

  • Page 12

    FAN1581 Mechanical Dimensions (continued) TO-220 Package 15.87 14.47 (1.30) 1.70 3° NOTES: UNLESS OTHERWISE SPECIFIED A) STANDARD LEAD FINISH: 200 MICROINCHES / 5.08 MICROMETERS MIN. LEAD/TIN 15/85 ON COPPER. B) REFERENCE JEDEC, TS–001, ISSUE A, VARIATION AA, DATED AUGUST 1989 ...

  • Page 13

    FAN1581 13 PRODUCT SPECIFICATION REV. 1.2.1 7/2/09 ...

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