component
TL431BCDBZR
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23-3. 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
markdownTL431BCDBZR
Texas Instruments · Voltage Reference · SOT-23-3
TL431BCDBZR from Texas Instruments, in a SOT-23-3. 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 | bidirectional | Shunt current/voltage input (灌电流/电压输入) for the TL431 in the DBZ SOT-23-3 package; datasheet lists this pin's electrical type as I/O. Recommended cathode voltage range is Vref (~2.5V) to 36V and recommended continuous cathode current range is 1mA to 100mA (absolute maximum cathode current -100mA to 150mA, absolute maximum cathode voltage 37V). |
| 2 | REF | input | Reference/threshold input relative to the common ANODE pin (相对于通用阳极的阈值); requires a reference input current of typically 2µA (maximum 4µA, absolute maximum input current -0.05mA to 10mA) and sets the internal 2.5V (typ. 2.495V, B-grade range 2.483V-2.507V) reference used to program the output. |
| 3 | ANODE | power_in | Common pin, typically connected to ground/return (通用引脚，通常接地); datasheet electrical type for this pin is listed as O (output). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
TL431BCDBZR - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl431bcdbzr-etched.step/tl431bcdbzr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431bcdbzr.step/tl431bcdbzr.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 2026-09-22, 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).