component
TL431N
Public Made by Adomby adom
Shikues Voltage Reference, SOT-23. 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
markdownTL431N
Shikues · Voltage Reference · SOT-23
TL431N from Shikues, in a SOT-23. 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 | Cathode | passive | Cathode is the output of the shunt regulator, rated for a cathode voltage of 37 V absolute maximum (36 V recommended maximum) and a continuous cathode current of -100 to +150 mA absolute maximum, with 1 to 100 mA recommended. |
| 2 | Reference | input | Reference input sets the regulated voltage, with a reference input voltage of 2.487 to 2.513 V at IKA = 10 mA and a reference input current limited to -0.05 to +10 mA. |
| 3 | Anode | passive | Anode is the common terminal of the device; the datasheet gives no anode-specific voltage or current limit beyond the device-level ratings. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shikues |
| Package | SOT-23 |
| 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 |
|---|---|---|---|---|---|---|---|
| Cathode Voltage | VKA | 37 | V | 1 | |||
| Cathode Current Range (Continuous) | IKA | -100 | 150 | mA | 1 | ||
| Reference Input Current Range | IREF | -0.05 | 10 | mA | 1 | ||
| Power Dissipation | PD | 350 | mW | 1 | |||
| Operating Temperature Range | Topr | -25 | 85 | °C | 1 | ||
| Junction Temperature | Tj | 150 | °C | 1 | |||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 1 | ||
| Cathode Voltage (min printed as VREF) | VKA | 36 | V | 1 | |||
| Cathode Current | IKA | 1 | 100 | mA | 1 | ||
| Deviation of Reference Input Voltage Over Temperature | ΔVREF/ΔT | 4.5 | 17 | mV | at VKA = VREF, IKA = 10 mA, -25 °C ≤ Ta ≤ +85 °C | 1 | |
| Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (ΔVKA = 10 V to VREF) | ΔVREF/ΔVKA | -1 | -2.7 | mV/V | at IKA = 10 mA, ΔVKA = 10 V to VREF | 1 | |
| Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (ΔVKA = 36 V to 10 V) | ΔVREF/ΔVKA | -0.5 | -2 | mV/V | at IKA = 10 mA, ΔVKA = 36 V to 10 V | 1 | |
| Reference Input Current | IREF | 1.5 | 4 | μA | at IKA = 10 mA, R1 = 10 KΩ, R2 = ∞ | 1 | |
| Deviation of Reference Input Current Over Full Temperature | ΔIREF/ΔT | 0.4 | 1.2 | μA | at IKA = 10 mA, R1 = 10 KΩ, R2 = ∞, -25 °C ≤ Ta ≤ +85 °C | 1 | |
| Minimum Cathode Current for Regulation | IKA(min) | 0.45 | 1 | mA | at VKA = VREF | 1 | |
| Off-Stage Cathode Current | IKA(OFF) | 0.05 | 1 | μA | at VKA = 36 V, VREF = 0 | 1 | |
| Dynamic Impedance | ZKA | 0.15 | 0.5 | Ω | at VKA = VREF, IKA = 1 to 100 mA, f ≤ 1 KHz | 1 | |
| Reference Input Voltage | VREF | 2.487 | 2.5 | 2.513 | V | at VKA = VREF, IKA = 10 mA | 1 |
CAD (KiCad official)
- Symbol:
TL431N - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
tl431n-etched.step/tl431n-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431n.step/tl431n.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shikues datasheet (3 pp, sha256
a1cbcc087006b2ad, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).