component
TL431CLPR
Public Made by Adomby adom
Texas Instruments Voltage Reference, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTL431CLPR
Texas Instruments · Voltage Reference · TO-92-3
TL431CLPR 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 | Cathode output for parallel shunt regulation, accepts 1 to 100 mA continuous current, provides programmable output voltage from 2.5V to 36V with typical output impedance of 0.2Ω, referenced to anode. |
| 2 | ANODE | power_in | Ground reference pin connected to system ground, provides voltage reference for the internal 2.5V reference and all circuit operations. |
| 3 | REF | input | Reference input pin compared against 2.5V ±0.5% (C-grade) internal reference, requires 2 to 4 µA input current, set output voltage via external feedback resistor divider network. |
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 (VKA = Vref, IKA = 10 mA, 25°C) | Vref | 2440 | 2495 | 2550 | mV | VKA = Vref, IKA = 10mA | 7 |
| Reference voltage deviation over full temperature range (all other devices, not SOT23-3 / TL432) | VI(dev) | 4 | 25 | mV | VKA = Vref, IKA = 10mA; all other devices | 7 | |
| Ratio of reference voltage change to cathode voltage change | ΔVref/ΔVKA | -1.4 | -2.7 | mV/V | IKA = 10mA; ΔVKA = 10V - Vref | 7 | |
| Ratio of reference voltage change to cathode voltage change | ΔVref/ΔVKA | -1 | -2 | mV/V | IKA = 10mA; ΔVKA = 36V - 10V | 7 | |
| Reference input current | Iref | 2 | 4 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞ | 7 | |
| Reference input current deviation over full temperature range | II(dev) | 0.4 | 1.2 | µA | IKA = 10mA, R1 = 10kΩ, R2 = ∞ | 7 | |
| Minimum cathode current for regulation | Imin | 0.4 | 1 | mA | VKA = Vref | 7 | |
| Off-state cathode current | Ioff | 0.1 | 1 | µA | VKA = 36V, Vref = 0 | 7 | |
| Dynamic impedance | /ZKA/ | 0.2 | 0.5 | Ω | VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA | 7 | |
| Cathode voltage (absolute maximum) | VKA | 37 | V | All voltages referenced to ANODE | 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 given as Vref | 6 | ||
| Continuous cathode current range (recommended) | IKA | 1 | 100 | mA | 6 | ||
| Operating free-air temperature range, TL431C grade | TA | 0 | 70 | °C | Natural convection; TL43xxC | 6 | |
| Junction-to-ambient thermal resistance (LP / TO-92 package) | RθJA | 140 | °C/W | 6 | |||
| Junction-to-case (top) thermal resistance (LP / TO-92 package) | RθJC(top) | 55 | °C/W | 6 |
CAD (KiCad official)
- Symbol:
TL431CLPR - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files:
tl431clpr-etched.step/tl431clpr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431clpr.step/tl431clpr.glbare 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).