SNVS443C May 2006 – December 2016 LM3489 , LM3489-Q1
PRODUCTION DATA.
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NO. | NAME | ||
| 1 | ISENSE | I | The current sense input pin. This pin must be connected to the PFET drain terminal directly or through a series resistor up to 600 Ω for 28 V > VIN > 35 V. |
| 2 | GND | — | Signal ground |
| 3 | EN | I | 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 | I | The feedback input. Connect the FB to a resistor voltage divider between the output and GND for an adjustable output voltage. |
| 5 | ADJ | I | Current limit threshold adjustment. Connected to an internal 5.5-µA 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 overcurrent condition has occurred. |
| 6 | PGND | — | Power ground |
| 7 | PGATE | O | Gate drive output for the external PFET. PGATE swings between VIN and VIN 5-V. |
| 8 | VIN | I | Power supply input pin |