component
TL431CM3
Public Made by Adomby adom
HGSEMI 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
markdownTL431CM3
HGSEMI · Voltage Reference · SOT-23-3
TL431CM3 from HGSEMI, 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 | CATHODE | bidirectional | Shunt current/voltage input; the datasheet recommends cathode current of 1 mA to 100 mA and cathode voltage up to Vref to 36 V, with an absolute maximum of 37 V. |
| 2 | REF | input | Threshold input referenced to the common anode; it needs at least about 4 µA of reference current (IREF) and must not be left floating, with an absolute range of -0.05 mA to 10 mA. |
| 3 | ANODE | output | Common pin, normally connected to ground (datasheet type O); pin 2 footnote on the pinout figure says the substrate pin must be connected to ANODE or left open. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| 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 | Vref | 2440 | 2495 | 2550 | mV | VKA = Vref, IKA = 10 mA | 6 |
| Deviation of reference input voltage over full temperature range (SOT-23 devices) | VI(dev) | 6 | 16 | mV | VKA = Vref, IKA = 10 mA, SOT-23 and TL432 devices | 6 | |
| Ratio of change in reference voltage to change in cathode voltage | ΔVref / ΔVKA | -1.4 | -2.7 | mV/V | IKA = 10 mA, ΔVKA = 10 V, Vref | 6 | |
| Ratio of change in reference voltage to change in cathode voltage | ΔVref / ΔVKA | -1 | -2 | mV/V | IKA = 10 mA, ΔVKA = 36 V, 10 V | 6 | |
| Reference input current | Iref | 2 | 4 | µA | IKA = 10 mA, R1 = 10 kΩ, R2 = ∞ | 6 | |
| Deviation of reference input current over full temperature range | II(dev) | 0.4 | 1.2 | µA | IKA = 10 mA, R1 = 10 kΩ, R2 = ∞ | 6 | |
| Minimum cathode current for regulation | Imin | 0.4 | 1 | mA | VKA = Vref | 6 | |
| Off-state cathode current | Ioff | 0.1 | 1 | µA | VKA = 36 V, Vref = 0 | 6 | |
| Dynamic impedance | /zKA/ | 0.2 | 0.5 | Ω | VKA = Vref, f ≤ 1 kHz, IKA = 1 mA to 100 mA | 6 | |
| Cathode voltage | VKA | 37 | V | 5 | |||
| Continuous cathode current range | IKA | -100 | 150 | mA | 5 | ||
| Reference input current range | II(ref) | -0.05 | 10 | mA | 5 | ||
| Operating virtual junction temperature | TJ | 150 | °C | 5 | |||
| Storage temperature range | Tstg | -65 | 150 | °C | 5 | ||
| Lead temperature (soldering) | TL | 260 | °C | Soldering, 10 seconds | 5 | ||
| Electrostatic discharge, human-body model | V(ESD) | -2000 | 2000 | V | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 | 5 | |
| Electrostatic discharge, charged-device model | V(ESD) | -1000 | 1000 | V | Charged-device model (CDM), per JEDEC JESD22-C101 | 5 | |
| Cathode voltage | VKA | 36 | V | 5 | |||
| Cathode current | IKA | 1 | 100 | mA | 5 | ||
| Operating free-air temperature (TL431C grade) | TA | 0 | 70 | °C | TL43xxC | 5 |
CAD (KiCad official)
- Symbol:
TL431CM3 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
tl431cm3-etched.step/tl431cm3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431cm3.step/tl431cm3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (28 pp, sha256
89d7314982a4fe34, retrieved 2026-10-17, 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).