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LM3489 데이터시트(PDF) 2 Page - National Semiconductor (TI) |
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LM3489 데이터시트(HTML) 2 Page - National Semiconductor (TI) |
2 / 15 page Connection Diagram Top View 20186909 8 Lead Plastic MSOP-8 NS package Number MUA08A Package Marking and Ordering Information Order Number Package Type Package Marking Supplied As: LM3489MM MSOP-8 SKSB 1000 units on Tape and Reel LM3489MMX MSOP-8 SKSB 3500 units on Tape and Reel Pin Descriptions Pin # Name Description 1 ISENSE The current sense input pin. This pin should be connected to the PFET drain terminal directly or through a series resistor up to 600 ohm for 28V>Vin>35V. 2 GND Signal ground. 3 EN Enable pin. Connect EN pin to ground to shutdown the part or float to enable operation (Internally pulled high). This pin can also be used to perform UVLO function. 4 FB The feedback input. Connect the FB to a resistor voltage divider between the output and GND for an adjustable output voltage. 5 ADJ Current limit threshold adjustment. Connected to an internal 5.5µA current source. A resistor is connected between this pin and VIN. The voltage across this resistor is compared with the ISENSE pin voltage to determine if an over-current condition has occurred. 6 PGND Power ground. 7 PGATE Gate Drive output for the external PFET. PGATE swings between VIN and VIN-5V. 8 VIN Power supply input pin. www.national.com 2 |
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