TLV431BFTA-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 pin. Internal error amplifier compares this pin to the internal 1.24 V bandgap and adjusts cathode conduction to hold REF at Vref. Reference input current is typ 0.7 uA (max 4.0 uA); absolute maximum reference input current 10 mA.
2	CATHODE	power_in	Cathode (K) of the shunt regulator. Sinks continuous current in the range 0.1-100 mA (abs max -100 to +150 mA) to hold Vka at the programmed voltage. Vka absolute maximum 18 V; dynamic impedance 0.05 Ω typ.
3	ANODE	power_in	Anode (A) of the shunt regulator, common return for all voltages in the device (datasheet notes all voltages are referenced to the anode). Connect to circuit ground for standard shunt-reference use.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TLV431BFTA-TP

CAD (KiCad official)

Symbol: TLV431BFTA-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
`tlv431bfta-tp.step`	59 KB	You want the bare part, or you mark your own boards.
`tlv431bfta-tp-etched.step`	1.5 MB	You want the part with `TLV431BFTA-TP` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 402 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 47f6772176fde823, 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