component

LM3671MFX-ADJ

Public Made by Adom

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Texas Instruments DC-DC Converters, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)lm3671mfx-adjfactory-2.0.0extractor-text

Verified LM3671MFX-ADJ

by Ray · last 6 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

6 Nov 2026RayPublished by the parts factory: tier mfr, 5 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LM3671MFX-ADJ · SOT-23-5 · 5 pins
  • ✓copper: 5 copper pads, none touching another net
  • ✓datasheet: all 5 pin names found in the 38-page datasheet
  • ✓distributor: lcsc C2650329, digikey LM3671MFX-ADJ-ND, mouser 926-LM3671MFX-ADJ
  • ✓family: SOT-23-5
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-l8lbcav7/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 5 pins = 5 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 5 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lm3671mfx-adj.kicad_sym✓ lm3671mfx-adj.kicad_mod✓ lm3671mfx-adj.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 20h ago
viewers lm3671mfx-adj: viewers · Ray 20h ago
lm3671mfx-adj-etched.glb Publish 0.1.0 · Ray 20h ago
lm3671mfx-adj-etched.step lm3671mfx-adj: factory component page (tier=mfr) · Ray 20h ago
lm3671mfx-adj-hero.glb lm3671mfx-adj: hero GLB from the etched model (keeps the MPN mark) · Ray 20h ago
lm3671mfx-adj-hero.overlay.json Publish 0.1.0 · Ray 20h ago
lm3671mfx-adj.glb Publish 0.1.0 · Ray 20h ago
lm3671mfx-adj.kicad_mod Publish 0.1.0 · Ray 20h ago
lm3671mfx-adj.kicad_sym Publish 0.1.0 · Ray 20h ago
lm3671mfx-adj.lbr Publish 0.1.0 · Ray 20h ago
lm3671mfx-adj.step Publish 0.1.0 · Ray 20h ago
package.json Publish 0.1.0 · Ray 20h ago
page.json Set visibility: public · Ray 20h ago
README.md Publish 0.1.0 · Ray 20h ago
verification.json Verified: Published by the parts factory: tier mfr, 5 pins · Ray 20h ago

LM3671MFX-ADJ

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

LM3671MFX-ADJ from Texas Instruments, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VIN power_in Power supply input that connects to the input filter capacitor, with the device rated for a 2.7 V to 5.5 V input range.
2 GND power_in Ground pin for the converter.
3 EN input Digital enable pin: the device is in shutdown mode when the voltage is below 0.4 V and enabled above 1 V, and this pin must not be left floating.
4 FB input Feedback analog input that connects directly to the output filter capacitor for fixed versions, while the adjustable version requires external resistor dividers since its internal dividers are disabled.
5 SW output Switching node connection to the internal PFET switch and NFET synchronous rectifier.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input voltage VIN 2.7 5.5 V −40°C to 125°C, see(4) 6
Feedback voltage (ADJ) MF PWM mode VFB -4 4 % MF, PWM mode, −40°C to 125°C 6
Shutdown supply current ISHDN 1 µA EN = 0 V, −40°C to 125°C 6
DC bias current into VIN IQ 16 35 µA No load, device is not switching (FB forced higher than programmed output voltage), −40°C to 125°C 6
Pin-pin resistance for PFET RDSON (P) 380 500 mΩ VIN = VGS = 3.6 V 6
Pin-pin resistance for NFET RDSON (N) 250 400 mΩ VIN = VGS = 3.6 V 6
Switch peak current limit ILIM 830 1020 1150 mA Open loop, −40°C to 125°C (typ at 25°C open loop) 6
Logic high input VIH 1 V −40°C to 125°C 6
Logic low input VIL 0.4 V −40°C to 125°C 6
Enable (EN) input current IEN 0.01 1 µA −40°C to 125°C 6
Internal oscillator frequency ƒOSC 1.6 2 2.6 MHz PWM Mode, −40°C to 125°C (typ at PWM mode) 6
VIN pin voltage to GND VIN -0.2 6 V Absolute maximum, voltage to GND 4
FB, SW, EN pins voltage FB, SW, EN -0.2 V GND − 0.2 to VIN + 0.2 V as printed 4
Junction temperature, TJ-MAX TJ-MAX 125 °C Absolute maximum 4
Maximum lead temperature (soldering, 10 sec.) 260 °C Soldering, 10 sec. 4
Storage temperature Tstg -65 150 °C 4
Recommended load current 0 600 mA 5
Junction temperature, TJ TJ -40 125 °C 5
Ambient temperature, TA TA -40 85 °C 5
Junction-to-ambient thermal resistance (DBV SOT-23) RθJA 165.7 °C/W DBV (SOT-23), 5 pins 5
Junction-to-board thermal resistance (DBV SOT-23) RθJB 26.8 °C/W DBV (SOT-23), 5 pins 5

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper 3. Connect the ground pins of the LM3671 and filter capacitors together using generous component-side copper fill as a pseudo-ground plane. Then, connect this to the ground-plane (if one is used) with 21

CAD (KiCad official)

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

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (38 pp, sha256 5fddbe8ad486a080, retrieved 2026-11-06, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF