component
TL431BQDBZRG4
Public Made by Adomby adom
Texas Instruments Voltage References, SOT-23-3. Pinout reviewed by a person 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
markdownTL431BQDBZRG4
Texas Instruments · Voltage References · SOT-23-3
TL431BQDBZRG4 from Texas Instruments, in a SOT-23-3. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | REF | input | Reference voltage input compared against 2.5V internal threshold; controls regulated output voltage with input current range 2-4µA typical. |
| 2 | CATHODE | output | Regulated output terminal maintaining Vref to 36V; sinks 1-100mA continuous cathode current for parallel voltage regulation. |
| 3 | ANODE | power_in | Common ground return reference terminal; all voltages referenced to this pin at circuit ground potential. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3 |
| Category | Power Supply Chip |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
TL431BQDBZRG4 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl431bqdbzrg4-etched.step/tl431bqdbzrg4-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431bqdbzrg4.step/tl431bqdbzrg4.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (86 pp, sha256
0eb18c491f5517a3, retrieved 2026-09-29, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).