component
LM2674M-ADJ
Public Unreviewedby Ray
UMW DC-DC Converters, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
PCB Footprint
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
Datasheet
Open in new tab ↗Loads on click. Unloads when scrolled away or the tab is hidden.
Contents
README
markdownLM2674M-ADJ
UMW · DC-DC Converters · SOP-8
LM2674M-ADJ from UMW, in a SOP-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 | passive | Boost (bootstrap) capacitance terminal. External capacitor (typ. 10 nF, 103/50V) is connected between CB and VSW to provide the bootstrapped gate drive for the internal high-side power switch. |
| 2 | NC | unconnected | No connect (empty port). Leave floating or tie to GND per PCB convention. |
| 3 | NC | unconnected | No connect (empty port). Leave floating or tie to GND per PCB convention. |
| 4 | FB | input | Feedback control terminal. Senses the output voltage through an external R1/R2 divider; VOUT = VREF x (1 + R2/R1). Absolute limit -0.3 V to VIN. |
| 5 | ON/OFF | input | Enable terminal, TTL-compatible with hysteresis. High = ON, Low = OFF. VON(ON) min 1.5 V, VON(OFF) max 0.8 V. Absolute limit -0.3 V to 6 V. |
| 6 | GND | power_in | Power supply ground terminal; reference for VIN, FB, and ON/OFF. |
| 7 | VIN | power_in | Positive terminal of the power supply. Operating range 7 V to 40 V, absolute max 45 V. Bypass locally with a 100 uF input capacitor. |
| 8 | VSW | output | Power switch output terminal (SW). Internal high-side switch node that drives the external inductor and catch diode; also the return for the bootstrap capacitor at CB. Absolute range -1 V to VIN. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOP-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
LM2674M-ADJ
CAD (KiCad official)
- Symbol:
LM2674M-ADJ - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
lm2674m-adj.step |
122 KB | You want the bare part, or you mark your own boards. |
lm2674m-adj-etched.step |
1.7 MB | You want the part with LM2674M-ADJ already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 452 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (14 pp, sha256
8da892f0ae83409e, retrieved 2026-08-17, tier: lcsc) - 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).