component

TL431BCLP

Public Made by Adom

by adom

Texas Instruments Voltage Reference, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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page.json tl431bclp: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 25d ago
README.md tl431bclp: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 25d ago
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tl431bclp-hero.glb tl431bclp: hero GLB from the etched model (keeps the MPN mark) · Ray 29d ago
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TL431BCLP

Texas Instruments · Voltage Reference · TO-92-3

TL431BCLP from Texas Instruments, in a TO-92-3. 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 bidirectional Shunt current/voltage input; operates from Vref to 36 V with 1 mA to 100 mA continuous cathode current.
2 ANODE power_in Common pin, normally connected to ground.
3 REF input Threshold relative to the common anode (Vref about 2.495 V); must not float because it needs Iref of about 2 to 4 µA.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TO-92-3
Category Power Management (PMIC)
Pins 3

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 (TL431BC, VKA = Vref, IKA = 10 mA) Vref 2483 2495 2507 mV VKA = Vref, IKA = 10mA 13
Reference voltage deviation over full temperature range VI(dev) 6 16 mV VKA = Vref, IKA = 10mA 13
Reference voltage change to cathode voltage change ratio (10 V to Vref) ΔVref/ΔVKA -1.4 -2.7 mV/V IKA = 10mA, ΔVKA = 10V - Vref 13
Reference voltage change to cathode voltage change ratio (36 V to 10 V) ΔVref/ΔVKA -1 -2 mV/V IKA = 10mA, ΔVKA = 36V - 10V 13
Reference input current Iref 2 4 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 13
Reference input current deviation over full temperature range II(dev) 0.8 1.2 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 13
Minimum cathode current for regulation Imin 0.4 0.6 mA VKA = Vref 13
Off-state cathode current Ioff 0.1 0.5 µA VKA = 36V, Vref = 0 13
Dynamic impedance /ZKA/ 0.2 0.5 Ω VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA 13
Cathode voltage (recommended) VKA 36 V 6
Continuous cathode current range (recommended) IKA 1 100 mA 6
Operating free-air temperature range, TL43xxC TA 0 70 °C Natural ventilation, TL43xxC 6
Cathode voltage (absolute maximum) VKA 37 V 6
Continuous cathode current range (absolute maximum) IKA -100 150 mA 6
Reference input current (absolute maximum) II(ref) -0.05 10 mA 6
Operating junction temperature range TJ 150 °C 6
Storage temperature range Tstg -65 150 °C 6
Junction-to-ambient thermal resistance (LP package) RθJA 140 °C/W 6
Junction-to-case (top) thermal resistance (LP package) RθJC(top) 55 °C/W 6

CAD (KiCad official)

  • Symbol: TL431BCLP
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92-3 (KiCad packages3D, STEP)
  • 3D model files: tl431bclp-etched.step / tl431bclp-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431bclp.step / tl431bclp.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 2026-10-11, 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 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (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