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FAN1581DX Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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FAN1581DX Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 13 page FAN1581 PRODUCT SPECIFICATION 2 REV. 1.2.0 11/6/03 Pin Assignments Pin Definitions Internal Block Diagram Pin Number Pin Name Pin Function Descrition 1 VSense Remote Voltage Sense. Connect this pin to the load to permit true remote sensing and avoid trace drops. 2 ADJ/GND 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. 3 VOUT Output Voltage. This pin and the tab are output. 4 VCNTL 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. 5 VIN Input Voltage. FRONT VIEW 12 3 4 5 FRONT VIEW 12 3 4 5 FAN1581M-1.2, -1.5, -2.5 FAN1581M FRONT VIEW FAN1581D FRONT VIEW FAN1581D-1.2, -1.5, -2.5 FRONT VIEW FAN1581T 5-Lead Plastic TO-263 Θ JC=3°C/W* Tab is out. 5-Lead TO-220 Θ JC=3°C/W* Tab is VOUT. 5-Lead Plastic TO-252 DPAK Θ JC=3°C/W* Tab is out. 12 3 4 5 1 2 3 4 5 12 3 4 5 *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, θ JA can vary from 30 °C/W to more than 40 °C/W. Other mounting techniques can provide a thermal resistance lower than 30 °C/W. Current Limit Thermal Shutdown Vref Vin, Power Output Sense Adj VCNTL, Control 2 1 3 5 4 Voltage Loop Amplifier |
Similar Part No. - FAN1581DX |
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Similar Description - FAN1581DX |
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