AZ431LANTR-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. Compared internally to the 1.24 V bandgap (VREF); the shunt turns on when V(REF) exceeds VREF, sinking cathode current. Reference input current typically 0.7 µA (max 4 µA). Set output with a resistor divider from CATHODE to ANODE feeding this pin: Vo = VREF(1 + R1/R2) + IREF·R1.
2	CATHODE	passive	Cathode (K) of the shunt regulator. Sinks the regulated current from the external series/ballast resistor RB. Absolute-max VKA = 18 V; continuous IKA range −100 to +150 mA; minimum cathode current for regulation ~55 µA (typ). Dynamic impedance ZKA ≈ 0.05 Ω (typ) at IK = 1-100 mA.
3	ANODE	passive	Anode (A) of the shunt regulator, the low-side / ground-referenced terminal. All voltages in the datasheet 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.

AZ431LANTR-TP

CAD (KiCad official)

Symbol: AZ431LANTR-TP
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: TECH PUBLIC datasheet (5 pp, sha256 c93ff2bf93303ecc, 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