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TL431BILPR

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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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docs tl431bilpr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers tl431bilpr: viewers · Ray 1mo ago
package.json tl431bilpr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json tl431bilpr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 26d ago
README.md tl431bilpr: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 26d ago
tl431bilpr-etched.fit.json tl431bilpr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431bilpr-etched.glb tl431bilpr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431bilpr-etched.step tl431bilpr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431bilpr.glb Publish 0.1.0 · Ray 1mo ago
tl431bilpr.kicad_mod Publish 0.1.0 · Ray 1mo ago
tl431bilpr.kicad_sym Publish 0.1.0 · Ray 1mo ago
tl431bilpr.lbr Publish 0.1.0 · Ray 1mo ago
tl431bilpr.step Publish 0.1.0 · Ray 1mo ago

TL431BILPR

Texas Instruments · Voltage Reference · TO-92-3

TL431BILPR from Texas Instruments, in a TO-92-3. 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 output Parallel regulator output with active pull-down; accepts 1-100 mA cathode current to maintain regulated voltage between Vref (2.5V) and 36V.
2 ANODE power_in Common return/ground pin; typical connection to system ground or negative supply rail.
3 REF input Reference voltage input for programmable output regulation; internal threshold 2495 mV ±12 mV over operating temperature range.

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 Vref 2483 2495 2507 mV VKA = Vref, IKA = 10mA 14
Reference input voltage deviation over full temperature range VI(dev) 14 34 mV VKA = Vref, IKA = 10mA 14
Ratio of change in reference voltage to change in cathode voltage ΔVref/ΔVKA -1.4 -2.7 mV/V IKA = 10mA, ΔVKA = 10V - Vref 14
Ratio of change in reference voltage to change in cathode voltage ΔVref/ΔVKA -1 -2 mV/V IKA = 10mA, ΔVKA = 36V - 10V 14
Reference input current Iref 2 4 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 14
Reference input current deviation over full temperature range II(dev) 0.8 2.5 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 14
Minimum cathode current for regulation Imin 0.4 0.7 mA VKA = Vref 14
Off-state cathode current Ioff 0.1 0.5 µA VKA = 36V, Vref = 0 14
Dynamic impedance /ZKA/ 0.2 0.5 Ω VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA 14
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 (absolute maximum) TJ 150 °C 6
Storage temperature range Tstg -65 150 °C 6
Cathode voltage (recommended) VKA 36 V Minimum printed as Vref (no numeric value) 6
Continuous cathode current range (recommended) IKA 1 100 mA 6
Operating free-air temperature range (TL43xxI) TA -40 85 °C TL43xxI, natural air ventilation 6
Junction-to-ambient thermal resistance (LP package) RθJA 140 °C/W LP package 6
Junction-to-case (top) thermal resistance (LP package) RθJC(top) 55 °C/W LP package 6

CAD (KiCad official)

  • Symbol: TL431BILPR
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92-3 (KiCad packages3D, STEP)
  • 3D model files: tl431bilpr-etched.step / tl431bilpr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431bilpr.step / tl431bilpr.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