component
TL431AQDBVR
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-23-5. Datasheet-verified pinout, 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
markdownTL431AQDBVR
Texas Instruments · Voltage Reference · SOT-23-5
TL431AQDBVR from Texas Instruments, in a SOT-23-5. 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 | NC | unconnected | No internal connection on the TL431 (not TL432) SOT-23-5 (DBV) package, per the pin configuration diagram for TL431, TL431A, TL431B ... DBV. |
| 2 | NC | unconnected | No functional internal connection; this pin is attached to the die substrate and, per the datasheet footnote, must be connected to ANODE or left open. |
| 3 | CATHODE | bidirectional | Shunt-regulator I/O (cathode) pin that sinks the parallel current; recommended continuous cathode current is 1 mA to 100 mA while VKA is regulated between Vref (~2.5 V) and 36 V (absolute maximum continuous cathode current −100 mA to 150 mA, absolute maximum VKA 37 V). |
| 4 | REF | input | Reference/threshold input measured relative to the common ANODE pin; typical reference input current is 2 µA (max 4 µA) at IKA=10 mA, with an absolute maximum reference input current range of −0.05 mA to 10 mA. |
| 5 | ANODE | power_in | Common pin that is normally connected to ground/return, forming the current path back from CATHODE through the internal regulator. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
TL431AQDBVR - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
tl431aqdbvr-etched.step/tl431aqdbvr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431aqdbvr.step/tl431aqdbvr.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-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).