component
TL431LIBEDBZRQ1
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
markdownTL431LIBEDBZRQ1
Texas Instruments · Voltage Reference · SOT-23-3
TL431LIBEDBZRQ1 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 | output | Regulated output cathode node; accepts continuous cathode current of 0.6 mA to 15 mA and maintains adjustable output voltage from 2.495 V to 36 V. |
| 2 | REF | input | Reference threshold input node; requires reference input current of 0.4 µA maximum and compares feedback voltage with internal 2.495 V reference for regulation. |
| 3 | ANODE | power_in | Common ground anode node; provides the voltage reference potential for regulation and cathode voltage measurement. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-3 |
| 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 (TL43xLIB devices, 0.5% grade) | Vref | 2483 | 2495 | 2507 | mV | VKA = Vref, IKA = 1 mA | 5 |
| Deviation of reference input voltage over full temperature range (TL43xLIxE devices) | VI(dev) | 14 | 34 | mV | VKA = Vref, IKA = 1 mA | 5 | |
| Ratio of change in reference voltage to change in cathode voltage (ΔVKA = 10 V - Vref) | ΔVref / ΔVKA | -1.4 | -2.7 | mV/V | IKA = 1 mA, ΔVKA = 10 V - Vref | 5 | |
| Ratio of change in reference voltage to change in cathode voltage (ΔVKA = 36 V - 10 V) | ΔVref / ΔVKA | -1 | -2 | mV/V | IKA = 1 mA, ΔVKA = 36 V - 10 V | 5 | |
| Reference Input Current | Iref | 0.2 | 0.4 | µA | IKA = 1 mA, R1 = 10kΩ, R2 = ∞ | 5 | |
| Deviation of reference input current over full temperature range | II(dev) | 0.1 | 0.3 | µA | IKA = 1 mA, R1 = 10kΩ, R2 = ∞ | 5 | |
| Minimum cathode current for regulation | Imin | 0.6 | mA | VKA = Vref | 5 | ||
| Off-state cathode current | Ioff | 0.1 | 1 | µA | VKA = 36 V, Vref = 0 | 5 | |
| Dynamic Impedance | /ZKA/ | 0.3 | 0.75 | Ω | VKA = Vref, IKA = 1 mA to 15 mA | 5 | |
| Cathode Voltage | VKA | 36 | V | 4 | |||
| Continuous Cathode Current Range | IKA | 0.6 | 15 | mA | 4 | ||
| Operating Free-Air Temperature (TL43xLIxE) | TA | -40 | 150 | °C | TL43xLIxE | 4 | |
| Cathode Voltage | VKA | 37 | V | All voltage values with respect to ANODE | 4 | ||
| Continuous Cathode Current Range | IKA | -10 | 18 | mA | 4 | ||
| Reference Input Current | II(ref) | -5 | 10 | mA | 4 | ||
| Operating Junction Temperature Range | TJ | -40 | 150 | °C | 4 | ||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 4 | ||
| Junction-to-ambient thermal resistance (DBZ, 3 pins) | RθJA | 371.7 | C/W | 4 | |||
| Junction-to-case (top) thermal resistance (DBZ, 3 pins) | RθJC(top) | 145.9 | C/W | 4 | |||
| Junction-to-board thermal resistance (DBZ, 3 pins) | RθJB | 104.7 | C/W | 4 | |||
| Junction-to-top characterization resistance (DBZ, 3 pins) | ψJT | 23.9 | C/W | 4 | |||
| Junction-to-board characterization resistance (DBZ, 3 pins) | ψJB | 102.9 | C/W | 4 |
CAD (KiCad official)
- Symbol:
TL431LIBEDBZRQ1 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl431libedbzrq1-etched.step/tl431libedbzrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431libedbzrq1.step/tl431libedbzrq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (35 pp, sha256
38f20793e4941c3c, 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).