component

TL431BQDBZT

Public Made by Adom

by adom

Texas Instruments Voltage Reference, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)tl431bqdbztfactory-2.0.0extractor-text
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Symbol & Footprint

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Contents

README

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TL431BQDBZT

Texas Instruments · Voltage Reference · SOT-23-3

TL431BQDBZT from Texas Instruments, in a SOT-23-3. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CATHODE passive Shunt regulator cathode (K); operating VKA range Vref to 36 V, IKA 1 mA to 100 mA continuous; absolute maximum VKA 37 V, IKA 150 mA.
2 REF input Voltage-feedback reference input to internal comparator; nominal threshold Vref = 2.495 V typ (2.483 V min, 2.507 V max for B grade); requires Iref 2 µA typ, 4 µA max at IKA = 10 mA.
3 ANODE power_in Common anode (GND) return terminal; all device voltages are referenced to this pin; normally connected to circuit ground.

Key specifications

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

CAD (KiCad official)

  • Symbol: TL431BQDBZT
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: tl431bqdbzt-etched.step / tl431bqdbzt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431bqdbzt.step / tl431bqdbzt.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (86 pp, sha256 313277b9351e61ed, retrieved 2026-09-27, 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: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF