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TL431AIDBVR

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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 tl431aidbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers tl431aidbvr: viewers · Ray 1mo ago
package.json tl431aidbvr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json tl431aidbvr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 26d ago
README.md tl431aidbvr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 26d ago
tl431aidbvr-etched.fit.json tl431aidbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431aidbvr-etched.glb tl431aidbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431aidbvr-etched.step tl431aidbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431aidbvr.glb Publish 0.1.0 · Ray 1mo ago
tl431aidbvr.kicad_mod Publish 0.1.0 · Ray 1mo ago
tl431aidbvr.kicad_sym Publish 0.1.0 · Ray 1mo ago
tl431aidbvr.lbr Publish 0.1.0 · Ray 1mo ago
tl431aidbvr.step Publish 0.1.0 · Ray 1mo ago

TL431AIDBVR

Texas Instruments · Voltage Reference · SOT-23-5

TL431AIDBVR 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/TL431A/TL431B DBV (SOT-23-5) package pinout.
2 NC unconnected No internal connection, but this pin is attached to the die substrate; the datasheet states it must be connected to ANODE or left open.
3 CATHODE bidirectional Shunt current/voltage (I/O) terminal of the regulator; recommended continuous cathode current range is 1 mA to 100 mA (absolute maximum -100 mA to 150 mA) with cathode voltage up to 37 V absolute maximum (36 V recommended maximum).
4 REF input Reference input threshold voltage relative to the common ANODE pin; must be driven with a reference input current (typical 2 µA, max 4 µA) and is internally regulated to approximately 2.5 V (Vref = 2440-2550 mV typical range) in closed-loop operation.
5 ANODE power_in Common pin of the device, described in the datasheet as typically connected to ground (通常接地); serves as the reference/return terminal for the cathode current and reference voltage.

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, TA = 25°C 11
Reference voltage deviation over full temperature range VI(dev) 5 50 mV VKA = Vref, IKA = 10mA; all other devices (not SOT23-3 / TL432) 11
Reference voltage change per cathode voltage change ΔVref / ΔVKA -1.4 -2.7 mV/V IKA = 10mA, ΔVKA = 10V - Vref 11
Reference voltage change per cathode voltage change ΔVref / ΔVKA -1 -2 mV/V IKA = 10mA, ΔVKA = 36V - 10V 11
Reference input current Iref 2 4 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 11
Reference input current deviation over full temperature range II(dev) 0.8 2.5 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 11
Minimum cathode current for regulation Imin 0.4 0.7 mA VKA = Vref 11
Off-state cathode current Ioff 0.1 0.5 µA VKA = 36V, Vref = 0 11
Dynamic impedance /ZKA/ 0.2 0.5 Ω VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA 11
Cathode voltage VKA 36 V Minimum printed as Vref (not numeric) 6
Continuous cathode current range IKA 1 100 mA 6
Operating free-air temperature range (TL43xxI) TA -40 85 ℃ Natural ventilation, TL43xxI grade 6
Cathode voltage (absolute maximum) VKA 37 V Referenced to ANODE 6
Continuous cathode current IKA -100 150 mA 6
Reference input current (absolute maximum) II(ref) -0.05 10 mA 6
Operating junction temperature TJ 150 °C 6
Storage temperature Tstg -65 150 °C 6
Junction-to-ambient thermal resistance RθJA 206 °C/W DBV (5-pin) package 6
Junction-to-case (top) thermal resistance RθJC(top) 131 °C/W DBV (5-pin) package 6

CAD (KiCad official)

  • Symbol: TL431AIDBVR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: tl431aidbvr-etched.step / tl431aidbvr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431aidbvr.step / tl431aidbvr.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 2026-09-22, 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