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TL431BQDBZR

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Texas Instruments Voltage Reference, SOT-23-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)tl431bqdbzr
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs tl431bqdbzr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
viewers tl431bqdbzr: viewers · Ray 27d ago
package.json Publish 0.1.0 · Ray 27d ago
page.json Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") · Ray 11d ago
README.md tl431bqdbzr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 15d ago
tl431bqdbzr-etched.fit.json tl431bqdbzr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
tl431bqdbzr-etched.glb tl431bqdbzr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
tl431bqdbzr-etched.step tl431bqdbzr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
tl431bqdbzr.glb Publish 0.1.0 · Ray 27d ago
tl431bqdbzr.kicad_mod Publish 0.1.0 · Ray 27d ago
tl431bqdbzr.kicad_sym Publish 0.1.0 · Ray 27d ago
tl431bqdbzr.lbr Publish 0.1.0 · Ray 27d ago
tl431bqdbzr.step Publish 0.1.0 · Ray 27d ago

TL431BQDBZR

Texas Instruments · Voltage Reference · SOT-23-3

TL431BQDBZR from Texas Instruments, in a SOT-23-3. 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 CATHODE passive Shunt cathode (K). Shunt current/voltage input; connects to the load via a series resistor. Sinks 1 mA to 100 mA when regulating; cathode voltage is set by the divider that drives REF to Vref (~2.5 V).
2 REF input Reference input to the internal error amplifier. Compared against the internal ~2.5 V bandgap reference; connect to the tap of the external resistor divider from CATHODE to ANODE to program the regulated cathode voltage.
3 ANODE passive Shunt anode (A). Common return, normally tied to circuit ground.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • TL431BQDBZR
  • TL431BQDBZRDBZT
  • TL431BQDBZRDBVR
  • TL431BQDBZRDBVT
  • TL431BQDBZRDR
  • TL431BQDBZRD
  • TL431BQDBZRP
  • TL431BQDBZRPS
  • TL431BQDBZRPWR
  • TL431BQDBZRPW
  • TL431BQDBZRLP
  • TL431BQDBZRLPR
  • TL431BQDBZRLPM
  • TL431BQDBZRDCKR
  • TL431BQDBZRDCKT
  • TL431BQDBZRPK

CAD (KiCad official)

  • Symbol: TL431BQDBZR
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: tl431bqdbzr-etched.step / tl431bqdbzr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431bqdbzr.step / tl431bqdbzr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (86 pp, sha256 0eb18c491f5517a3, 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