FAN1581T Fairchild Semiconductor, FAN1581T Datasheet

IC REG LDO 5A ADJ VOLT TO-220

FAN1581T

Manufacturer Part Number
FAN1581T
Description
IC REG LDO 5A ADJ VOLT TO-220
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of FAN1581T

Regulator Topology
Positive Adjustable
Voltage - Output
1.25 ~ 5.7 V
Voltage - Input
Up to 7V
Voltage - Dropout (typical)
0.4V @ 5A
Number Of Regulators
1
Current - Output
5A
Current - Limit (min)
5.2A
Operating Temperature
0°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-3 (Straight Leads)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FAN1581T
Manufacturer:
ON
Quantity:
30 000
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
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
10μF
10μF
1μF
1μF
+
+
+
+
V
V
V
V
FAN1581-1.2
CNTL
CNTL
IN
IN
FAN1581
Gnd
Adj
V
V
SENSE
SENSE
V
V
OUT
OUT
86.6Ω
124Ω
+
22μF
22μF
2.1V at 5A
1.2V at 5A
V
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
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
V
CNTL
V
CNTL
IN
TT
IN
= 5.75V
= 3.3V
= 12V
termination. Additionally, the FAN1581-1.2 offers fixed
= 5V
10μF
10μF
1μF
1μF
+
+
+
+
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-
124Ω
374Ω
REV. 1.2.1 7/2/09
+
+
22μF
22μF
2.5V at 5A
5V at 5A

Related parts for FAN1581T

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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