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TL431AQDBVR

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Texas Instruments Voltage Reference, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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docs tl431aqdbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers tl431aqdbvr: viewers · Ray 1mo ago
package.json tl431aqdbvr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json tl431aqdbvr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 25d ago
README.md tl431aqdbvr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 25d ago
tl431aqdbvr-etched.fit.json tl431aqdbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431aqdbvr-etched.glb tl431aqdbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431aqdbvr-etched.step tl431aqdbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431aqdbvr.glb Publish 0.1.0 · Ray 1mo ago
tl431aqdbvr.kicad_mod Publish 0.1.0 · Ray 1mo ago
tl431aqdbvr.kicad_sym Publish 0.1.0 · Ray 1mo ago
tl431aqdbvr.lbr Publish 0.1.0 · Ray 1mo ago
tl431aqdbvr.step Publish 0.1.0 · Ray 1mo ago

TL431AQDBVR

Texas Instruments · Voltage Reference · SOT-23-5

TL431AQDBVR from Texas Instruments, in a SOT-23-5. 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 NC unconnected No internal connection on the TL431 (not TL432) SOT-23-5 (DBV) package, per the pin configuration diagram for TL431, TL431A, TL431B ... DBV.
2 NC unconnected No functional internal connection; this pin is attached to the die substrate and, per the datasheet footnote, must be connected to ANODE or left open.
3 CATHODE bidirectional Shunt-regulator I/O (cathode) pin that sinks the parallel current; recommended continuous cathode current is 1 mA to 100 mA while VKA is regulated between Vref (~2.5 V) and 36 V (absolute maximum continuous cathode current −100 mA to 150 mA, absolute maximum VKA 37 V).
4 REF input Reference/threshold input measured relative to the common ANODE pin; typical reference input current is 2 µA (max 4 µA) at IKA=10 mA, with an absolute maximum reference input current range of −0.05 mA to 10 mA.
5 ANODE power_in Common pin that is normally connected to ground/return, forming the current path back from CATHODE through the internal regulator.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Reference voltage Vref 2470 2495 2520 mV VKA = Vref, IKA = 10mA 12
Cathode current, continuous (recommended) IKA 1 100 mA 6
Operating free-air temperature, TL43xxQ grade TA -40 125 °C TL43xxQ 6
Continuous cathode current range (absolute maximum) IKA -100 150 mA 6
Reference input current (absolute maximum) II(ref) -0.05 10 mA 6
Storage temperature range Tstg -65 150 °C 6
Reference input voltage deviation over full temperature range VI(dev) 14 34 mV VKA = Vref, IKA = 10mA 12
Ratio of reference voltage change to cathode voltage change ΔVref / ΔVKA -1.4 -2.7 mV/V ΔVKA = 10V - Vref, IKA = 10mA 12
Ratio of reference voltage change to cathode voltage change ΔVref / ΔVKA -1 -2 mV/V ΔVKA = 36V - 10V, IKA = 10mA 12
Reference input current Iref 2 4 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 12
Reference input current deviation over full temperature range II(dev) 0.8 2.5 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 12
Minimum cathode current for regulation Imin 0.4 0.7 mA VKA = Vref 12
Off-state cathode current Ioff 0.1 0.5 µA VKA = 36V, Vref = 0 12
Dynamic impedance /ZKA/ 0.2 0.5 Ω VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA 12
Cathode voltage (recommended; minimum is Vref, not a number) VKA 36 V 6
Cathode voltage (absolute maximum) VKA 37 V 6
Operating junction temperature range (absolute maximum) TJ 150 °C 6
Junction-to-ambient thermal resistance RθJA 206 °C/W DBV (SOT-23-5) package column 6
Junction-to-case (top) thermal resistance RθJC(top) 131 °C/W DBV (SOT-23-5) package column 6

CAD (KiCad official)

  • Symbol: TL431AQDBVR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: tl431aqdbvr-etched.step / tl431aqdbvr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431aqdbvr.step / tl431aqdbvr.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 2026-09-23, 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-5 (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