TLVH431BIL3T from STMicroelectronics, 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 (feedback) input. Internal error amplifier regulates the cathode current so that this pin sits at Vref = 1.24 V. Tied to the tap of the external R1/R2 divider from cathode to anode to program the shunt voltage. Reference input current ~1.5 µA typ.
2	Cathode	passive	Shunt cathode (K). Sinks the regulated current (up to 60 mA) when VKA reaches the programmed value. VKA range Vref to 18 V; absolute max 22 V.
3	Anode	passive	Shunt anode (A), device ground return. Continuous cathode-to-anode current range ±100 mA (absolute max).

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

TLVH431BIL3TAIL3T
TLVH431BIL3T
TLVH431BIL3TMIL3T
TLVH431BIL3TLIL3T
TLVH431BIL3TAIL5T
TLVH431BIL3TBIL5T
TLVH431BIL3TLIL5T
TLVH431BIL3TAICT
TLVH431BIL3TBICT
TLVH431BIL3TLICT

CAD (KiCad official)

Symbol: TLVH431BIL3T
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

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

Datasheet: STMicroelectronics datasheet (15 pp, sha256 0f9228f5a3cc7573, 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