component

LM2674M-3.3

Public Made by Adom

by adom

UMW DC-DC Converters, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lm2674m-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
lm2674m-3-3-etched.fit.json lm2674m-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm2674m-3-3-etched.glb lm2674m-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm2674m-3-3-etched.step lm2674m-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm2674m-3-3.glb Publish 0.1.0 · Ray
lm2674m-3-3.kicad_mod Publish 0.1.0 · Ray
lm2674m-3-3.kicad_sym Publish 0.1.0 · Ray
lm2674m-3-3.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
lm2674m-3-3.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json lm2674m-3-3: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md lm2674m-3-3: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LM2674M-3.3

UMW · DC-DC Converters · SOP-8

LM2674M-3.3 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 capacitance terminal. External bootstrap capacitor (typ. 10 nF / 103 50 V) connects between CB and VSW to develop the gate drive rail needed to fully enhance the internal high-side switch.
2 NC unconnected Empty port. No internal connection; leave floating or tie to a non-conducting net.
3 NC unconnected Empty port. No internal connection; leave floating or tie to a non-conducting net.
4 FB input Feedback control terminal. Senses the regulated output; for the fixed 3.3 V version this pin is tied directly to VOUT. Absolute rating: -0.3 V to VIN.
5 ON/OFF input Enable terminal with hysteresis: High = ON, Low = OFF. TTL-compatible shutdown input. VON(ON) min 1.5 V, VON(OFF) max 0.8 V; absolute range -0.3 V to 6 V. Shutdown current typ. 100 µA.
6 GND power_in Power supply ground terminal. Common return for the input supply, control circuitry, and internal power switch.
7 VIN power_in Positive terminal of power supply. Operating input voltage range 7 V-40 V, absolute maximum 45 V. Bypass locally with a 100 µF (typ.) input capacitor.
8 VSW power_out Power switch output terminal (SW). Connects to the external inductor and catch diode of the buck power stage. 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-3.3

CAD (KiCad official)

  • Symbol: LM2674M-3.3
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: lm2674m-3-3-etched.step / lm2674m-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2674m-3-3.step / lm2674m-3-3.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm2674m-3-3.step 122 KB You want the bare part, or you mark your own boards.
lm2674m-3-3-etched.step 2.0 MB You want the part with LM2674M-3.3 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 496 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).

Datasheet PDF