component

LM3671MFX-3.3

Public Made by Adom

by adom

Texas Instruments LM3671MFX 3 3 NOPB DC-DC Converters, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentpmiclm3671mfx-3.3
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lm3671mfx-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
lm3671mfx-3-3-etched.fit.json lm3671mfx-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm3671mfx-3-3-etched.glb lm3671mfx-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm3671mfx-3-3-etched.step lm3671mfx-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm3671mfx-3-3.glb Publish 0.1.0 · Ray
lm3671mfx-3-3.kicad_mod Publish 0.1.0 · Ray
lm3671mfx-3-3.kicad_sym Publish 0.1.0 · Ray
lm3671mfx-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
lm3671mfx-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 lm3671mfx-3-3: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md lm3671mfx-3-3: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LM3671MFX-3.3

Texas Instruments · DC-DC Converters · SOT-23-5

LM3671MFX-3.3 from Texas Instruments, in a SOT-23-5. 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 VIN power_in Power supply input, 2.7 V to 5.5 V. Connect directly to the input filter (ceramic) capacitor. Absolute maximum 6 V to GND.
2 GND power_in Device ground reference. Return path for input capacitor and internal NFET synchronous rectifier.
3 EN input Enable input. Device is in shutdown mode when V(EN) < 0.4 V and enabled when V(EN) > 1 V. Do not leave floating; absolute maximum GND-0.2 V to VIN+0.2 V.
4 FB input Feedback analog input. For the fixed 3.3 V version, connect directly to the output filter capacitor at VOUT; the internal resistor divider sets the regulation point (internal dividers are disabled on the adjustable version).
5 SW output Switching node to the internal PFET high-side switch and NFET synchronous rectifier. Connect through the 2.2 uH power inductor to VOUT. Handles up to 600 mA load current.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • LM3671MFX-3.3
  • LM3671MFX-3.3TL
  • LM3671MFX-3.3TLX
  • LM3671MFX-3.3SD
  • LM3671MFX-3.3SDX

CAD (KiCad official)

  • Symbol: LM3671MFX-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lm3671mfx-3-3-etched.step / lm3671mfx-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm3671mfx-3-3.step / lm3671mfx-3-3.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm3671mfx-3-3.step 85 KB You want the bare part, or you mark your own boards.
lm3671mfx-3-3-etched.step 1.9 MB You want the part with LM3671MFX-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: 494 faces against 102 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: Texas Instruments datasheet (38 pp, sha256 c241e858da248679, 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