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TL431-0.5%

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by Ray

TDSEMIC Voltage Reference, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpower management (pmic)tl431-0.5%
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

markdown

TL431-0.5%

TDSEMIC · Voltage Reference · SOT-23

TL431-0.5% from TDSEMIC, 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 to the internal error amplifier's non-inverting input. Compared against the internal 2.5 V Vref; drives cathode current when REF exceeds Vref. Reference input current range is up to 10 mA (absolute max); typical low regulation current is 240 uA.
2 CATHODE power_in Cathode (K) of the shunt regulator. Sinks current to hold the REF pin at 2.5 V. Operating cathode voltage Vka = Vref (2.5 V) to 36 V; cathode current 0.3 mA to 100 mA (absolute max -100 to 150 mA).
3 ANODE power_in Anode (A) of the shunt regulator; connects to the circuit's low-side / ground return for the reference current path.

Key specifications

Parameter Value
Manufacturer TDSEMIC
Package SOT-23
Category Power Management (PMIC)
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • TL431-0.5%N
  • TL431-0.5%Z

CAD (KiCad official)

  • Symbol: TL431-0.5%
  • 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: TDSEMIC datasheet (13 pp, sha256 9792a244d74188a4, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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