FAN1581MX Fairchild Semiconductor, FAN1581MX Datasheet - Page 2

• Manufacturer Part Number: FAN1581MX
• Description: IC REG LDO 5A ADJ VOLT TO-263
• Manufacturer: Fairchild Semiconductor

Specifications of FAN1581MX

• 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: Surface Mount
• Package / Case: TO-263-3, D²Pak (3 leads + Tab), TO-263AA
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 7 V
• Output Voltage: 1.237 V to 5.7 V
• Output Type: Adjustable
• Dropout Voltage (max): 1.18 V
• Output Current: 5 A
• Line Regulation: 3 mV
• Load Regulation: 5 mV
• Voltage Regulation Accuracy: 0.5 %
• Maximum Power Dissipation: 18 W
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Reference Voltage: 1.263 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FAN1581
Pin Assignments
Pin Definitions
Internal Block Diagram
2
Number
*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, θ
FAN1581M-1.2,
Pin
FRONT VIEW
1 2 3 4 5
3
4
5
1
2
-1.5, -2.5
30 °C/W to more than 40 °C/W. Other mounting techniques can provide a thermal resistance lower than 30 °C/W.
5-Lead Plastic TO-263
Pin Name
ADJ/GND
Θ
VSense
Tab is out.
VCNTL
VOUT
JC
VIN
=3°C/W*
Shutdown
Thermal
FRONT VIEW
1 2 3 4 5
FAN1581M
Remote Voltage Sense. Connect this pin to the load to permit true remote sensing and
avoid trace drops.
Adjust or Ground. On the FAN1581, this pin forms the feedback to determine the output
voltage. On the FAN1581-1.2, -1.5 and -2.5, connect this pin to ground.
Output Voltage. This pin and the tab are output.
Control Voltage. This pin draws small-signal power to control the FAN1581 circuitry.
Connect to a voltage higher than VIN, as shown in the applications circuits.
Input Voltage.
Vref
4
V
CNTL
, Control
Voltage Loop
Amplifier
1
FRONT VIEW
FAN1581D
2
5-Lead Plastic TO-252 DPAK
3
Pin Function Descrition
4
Current
Θ
Limit
Tab is out.
JC
5
=3°C/W*
1
FAN1581D-1.2,
FRONT VIEW
-1.5, -2.5
2
3
4
5
Θ
JC
PRODUCT SPECIFICATION
5
3
1
2
=3°C/W* Tab is VOUT.
5-Lead TO-220
FRONT VIEW
1 2 3 4 5
Vin, Power
Output
Sense
Adj
FAN1581T
JA
REV. 1.2.1 7/2/09
can vary from