LMV431BIMFX-TP from TECH PUBLIC, in a SOT-23. 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	REF	input	Reference input. Compared internally against the ~1.24 V bandgap; drives the shunt element when REF exceeds Vref. Typical reference input current 0.7 µA (max 4 µA); absolute maximum reference input current ±10 mA.
2	CATHODE	passive	Cathode (K) of the shunt regulator. Sinks the regulated cathode current (0.1-100 mA operating, absolute max −100 to +150 mA). Absolute maximum cathode voltage Vka = 18 V.
3	ANODE	passive	Anode (A) of the shunt regulator, the device ground return. All voltage values are referenced to the anode.

Key specifications

Parameter	Value
Manufacturer	TECH PUBLIC
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

LMV431BIMFX-TP

CAD (KiCad official)

Symbol: LMV431BIMFX-TP
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lmv431bimfx-tp.step`	59 KB	You want the bare part, or you mark your own boards.
`lmv431bimfx-tp-etched.step`	1.7 MB	You want the part with `LMV431BIMFX-TP` 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 69 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: TECH PUBLIC datasheet (5 pp, sha256 387bb1c3545bdbd4, 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