component

TL431CM3

Public Made by Adom

by adom

HGSEMI Voltage Reference, SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TL431CM3

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431cm3.step / tl431cm3.glb are 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF