LM2674MX-ADJ

@@ -0,0 +1,50 @@+# LM2674MX-ADJ++**Texas Instruments** · DC-DC Converters · SOIC-8++LM2674MX-ADJ from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | CB | input | Bootstrap capacitor connection for the high-side driver. Connect a high-quality 10-nF (typ 470-nF per pin-function table) ceramic capacitor from CB to VSW to develop the boosted gate drive for the internal high-side DMOS switch. |+| 2 | NC | unconnected | No connect. Leave floating or tie to ground plane per layout guidance; not internally bonded. |+| 3 | NC | unconnected | No connect. Leave floating or tie to ground plane per layout guidance; not internally bonded. |+| 4 | FB | input | Feedback sense input for the internal error amplifier. On the ADJ version, connect to the midpoint of an external resistor divider from VOUT to GND to program the output voltage (VFB = 1.21 V nominal). Absolute-max rating -0.3 V to 14 V. |+| 5 | ON/OFF | input | Active-low TTL-compatible enable input. HIGH or floating = regulator ON; LOW = OFF with ~50-µA standby current. Absolute-max VSH range -0.1 V to 6 V. |+| 6 | GND | power_in | Power ground return. Connect directly to the system ground plane with the ground returns of CIN and COUT kept as short as possible for good switching-node bypass. |+| 7 | VIN | power_in | Supply input to the drain (collector) of the internal high-side DMOS switch. Operating range 6.5 V to 40 V (absolute-max 45 V). Requires a low-ESR bypass capacitor (e.g. 100 µF) placed close to VIN and GND. |+| 8 | VSW | output | Switching-node output; source of the internal high-side DMOS FET. Connects to the external inductor and the cathode of the catch (Schottky) diode. Rated to swing to -1 V below ground during freewheel. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `LM2674MX-ADJM`+- `LM2674MX-ADJMX`+- `LM2674MX-ADJN`+- `LM2674MX-ADJNHN`++## CAD (KiCad official)++- Symbol: `LM2674MX-ADJ`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lm2674mx-adj.pdf) (38 pp, sha256 `6899e1e558e13f56`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/lm2674mx-adj-datasheet.pdf)

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