component
TL431IDBZR
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
markdownTL431IDBZR
Texas Instruments · Voltage Reference · SOT-23-3
TL431IDBZR 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 (cathode of the programmable shunt regulator); recommended operating cathode voltage is Vref to 36V (absolute maximum 37V) and recommended continuous cathode current range is 1mA to 100mA (absolute maximum -100mA to 150mA); must be biased above the minimum regulating current Imin (0.4mA typ / 1mA max) for the device to remain in regulation. |
| 2 | REF | input | Reference/threshold input measured relative to the ANODE pin, internally compared to the ~2.5V internal reference (Vref = 2440-2550mV depending on grade); requires a reference input current Iref of about 2µA typ / 4µA max (VKA=Vref, IKA=10mA, R1=10kΩ, R2=∞) and must not be left floating because it drives the base of an internal NPN transistor. |
| 3 | ANODE | passive | Common pin of the device, normally connected to ground, providing the return path for the cathode and reference currents. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
TL431IDBZR - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl431idbzr-etched.step/tl431idbzr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431idbzr.step/tl431idbzr.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).