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TL431ILP

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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 tl431ilp: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers tl431ilp: viewers · Ray 1mo ago
package.json tl431ilp: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json tl431ilp: specified limits as data (metadata.characteristics, 21 rows from the datasheet) · Ray 26d ago
README.md tl431ilp: specified limits as data (metadata.characteristics, 21 rows from the datasheet) · Ray 26d ago
tl431ilp-etched.fit.json tl431ilp: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431ilp-etched.glb tl431ilp: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431ilp-etched.step tl431ilp: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
tl431ilp.glb Publish 0.1.0 · Ray 1mo ago
tl431ilp.kicad_mod Publish 0.1.0 · Ray 1mo ago
tl431ilp.kicad_sym Publish 0.1.0 · Ray 1mo ago
tl431ilp.lbr Publish 0.1.0 · Ray 1mo ago
tl431ilp.step Publish 0.1.0 · Ray 1mo ago

TL431ILP

Texas Instruments · Voltage Reference · TO-92-3

TL431ILP 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 passive Shunt-regulator cathode terminal; when biased with a cathode current Imin≥1mA (recommended range 1mA to 100mA, absolute max −100mA to 150mA) it regulates the cathode-to-anode voltage VKA from Vref (~2.5V) up to 36V (absolute max 37V).
2 ANODE passive Common pin of the device (typically connected to ground/circuit common), serving as the return path for cathode current.
3 REF input High-impedance reference/feedback input that sets the internal 2.495V threshold relative to ANODE; requires an input current (Iref) typically 2µA to 4µA (must be ≥ the minimum needed to bias the internal transistor, absolute maximum input current range −0.05mA to 10mA).

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
基准电压 (Reference voltage) Vref 2440 2495 2550 mV VKA = Vref, IKA = 10mA 8
整个温度范围内的基准输入电压偏差 (Reference input voltage deviation over temperature), all other devices VI(dev) 5 50 mV VKA = Vref, IKA = 10mA 8
基准电压变化与阴极电压变化之比 (Ratio of reference voltage change to cathode voltage change), ΔVKA = 10V - Vref ΔVref/ΔVKA -1.4 -2.7 mV/V IKA = 10mA; ΔVKA = 10V - Vref 8
基准电压变化与阴极电压变化之比 (Ratio of reference voltage change to cathode voltage change), ΔVKA = 36V - 10V ΔVref/ΔVKA -1 -2 mV/V IKA = 10mA; ΔVKA = 36V - 10V 8
基准输入电流 (Reference input current) Iref 2 4 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 8
整个温度范围内的基准输入电流偏差 (Reference input current deviation over temperature) II(dev) 0.8 2.5 µA IKA = 10mA, R1 = 10kΩ, R2 = ∞ 8
调节的最小阴极电流 (Minimum cathode current for regulation) Imin 0.4 1 mA VKA = Vref 8
关闭状态阴极电流 (Off-state cathode current) Ioff 0.1 1 µA VKA = 36V, Vref = 0 8
动态阻抗 (Dynamic impedance) /ZKA/ 0.2 0.5 Ω VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA 8
阴极电压 (Cathode voltage) VKA 37 V referenced to ANODE 6
连续阴极电流范围 (Continuous cathode current range) IKA -100 150 mA 6
基准输入电流 (Reference input current) II(ref) -0.05 10 mA 6
工作结温范围 (Operating junction temperature range) TJ 150 °C 6
贮存温度范围 (Storage temperature range) Tstg -65 150 °C 6
静电放电 人体放电模型 (ESD, Human Body Model) V(ESD) -2000 2000 V HBM per ANSI/ESDA/JEDEC JS-001 6
静电放电 充电器件模型 (ESD, Charged Device Model) V(ESD) -1000 1000 V CDM per JEDEC JESD22-C101 6
阴极电压 (Cathode voltage, recommended) VKA 36 V 6
连续阴极电流范围 (Continuous cathode current, recommended) IKA 1 100 mA 6
自然通风工作温度范围 TL43xxI (Operating free-air temperature) TA -40 85 °C free-air, TL43xxI 6
结至环境热阻, LP (TO-92) package (Junction-to-ambient thermal resistance) RθJA 140 °C/W LP package 6
结至外壳（顶部）热阻, LP (TO-92) package (Junction-to-case top thermal resistance) RθJC(top) 55 °C/W LP package 6

CAD (KiCad official)

  • Symbol: TL431ILP
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92-3 (KiCad packages3D, STEP)
  • 3D model files: tl431ilp-etched.step / tl431ilp-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431ilp.step / tl431ilp.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