component
TLV431QPK
Public Made by Adomby adom
Texas Instruments Voltage Reference, SOT-89-3. 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
markdownTLV431QPK
Texas Instruments · Voltage Reference · SOT-89-3
TLV431QPK from Texas Instruments, in a SOT-89-3. 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 | REF | input | Threshold reference input compared to 1.24V internal reference; minimum input current of 0.5µA required for proper operation |
| 2 | ANODE | power_in | Common ground pin, voltage reference for internal comparator; provides current return path for cathode and reference terminals |
| 3 | CATHODE | output | Shunt regulator output voltage node; regulated output adjustable from 1.24V to 6V; continuous cathode current rating ±20mA |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-89-3 |
| 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, TA = 25°C | VREF | 1.222 | 1.24 | 1.258 | V | VKA = VREF, IK = 10mA, TA = 25°C | 5 |
| Reference voltage, full temperature range (TLV431Q) | VREF | 1.194 | 1.286 | V | VKA = VREF, IK = 10mA, TA = full range (-40°C to 125°C) | 5 | |
| VREF deviation over full temperature range (TLV431Q) | VREF(dev) | 11 | 31 | mV | VKA = VREF, IK = 10mA, full temperature range | 5 | |
| Ratio of VREF change to cathode voltage change | ΔVREF/ΔVKA | -1.5 | -2.7 | mV/V | VKA = VREF to 6V, IK = 10mA | 5 | |
| Reference terminal current | Iref | 0.15 | 0.5 | µA | IK = 10mA, R1 = 10kΩ, R2 = open | 5 | |
| Iref deviation over full temperature range (TLV431Q) | Iref(dev) | 0.15 | 0.5 | µA | IK = 10mA, R1 = 10kΩ, R2 = open, full temperature range | 5 | |
| Minimum cathode current for regulation (TLV431Q) | IK(min) | 55 | 100 | µA | VKA = VREF | 5 | |
| Off-state cathode current | IK(off) | 0.001 | 0.1 | µA | VREF = 0, VKA = 6V | 5 | |
| Dynamic impedance | /zKA/ | 0.25 | 0.4 | Ω | VKA = VREF, f ≤ 1kHz, IK = 0.1mA to 15mA | 5 | |
| Cathode voltage (recommended) | VKA | 6 | V | Recommended operating range: from VREF to 6 V | 4 | ||
| Cathode current (recommended) | IK | 0.1 | 15 | mA | 4 | ||
| Operating free-air temperature (TLV431_Q) | TA | -40 | 125 | °C | TLV431_Q grade | 4 | |
| Cathode voltage (absolute maximum) | VKA | 7 | V | Voltage with respect to anode | 4 | ||
| Continuous cathode current (absolute maximum) | IK | -20 | 20 | mA | 4 | ||
| Reference current (absolute maximum) | Iref | -0.05 | 3 | mA | 4 | ||
| Operating virtual junction temperature (absolute maximum) | TJ | 150 | °C | 4 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| Junction-to-ambient thermal resistance (PK, SOT-89) | RθJA | 52 | °C/W | 4 | |||
| Junction-to-case (top) thermal resistance (PK, SOT-89) | RθJC(top) | 9 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
TLV431QPK - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
tlv431qpk-etched.step/tlv431qpk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tlv431qpk.step/tlv431qpk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (58 pp, sha256
34e0c5a62c65546c, 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).