SNVS026O March 2000 – June 2016 LM2679
PRODUCTION DATA.
| PIN | I/O | DESCRIPTION | ||
|---|---|---|---|---|
| NAME | TO-263, TO-220 | VSON | ||
| Switch output | 1 | 12, 13, 14 | O | Source pin of the internal high side FET. This is a switching node. Attached this pin to an inductor and the cathode of the external diode. |
| Input | 2 | 2, 3 | I | Supply input pin to collector pin of high side FET. Connect to power supply and input bypass capacitors CIN. Path from VIN pin to high frequency bypass CIN and GND must be as short as possible. |
| CB | 3 | 4 | I | Boot-strap capacitor connection for high-side driver. Connect a high quality 100-nF capacitor from CB to VSW pin. |
| GND | 4 | 9 | — | Power ground pins. Connect to system ground. Ground pins of CIN and COUT. Path to CIN must be as short as possible. |
| Current adjust | 5 | 6 | I | Current limit adjust pin. Connect a resistor from this pin to GND to set the current limit of the part. |
| FB | 6 | 7 | I | Feedback sense input pin. Connect to the midpoint of feedback divider to set VOUT for adjustable version or connect this pin directly to the output capacitor for a fixed output version. |
| SS | 7 | 8 | I | Soft-start pin. Connect a capacitor from this pin to GND to control the output voltage ramp. If the feature not desired, the pin can be left floating |
| NC | — | 1, 5, 10, 11 | — | No connect pins |