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lr431atslt1g

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by Ray

LRC Voltage Reference, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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README

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LR431ATSLT1G

LRC · Voltage Reference · SOT-23

LR431ATSLT1G from LRC, in a SOT-23. 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 Reference input. Voltage-sensing input of the internal error amplifier; regulation forces this pin to Vref (typ. 2.5 V) relative to the Anode. Reference input current is typ. 1 μA (max 2 μA); off-state cathode current at VKA=36 V, VREF=0 is 0.05 μA typ.
2 K passive Cathode. Regulated shunt terminal; carries the controlled sink current IKA (regulation range 1-100 mA, min IKA for regulation 0.3 mA typ.). Absolute maximum cathode voltage 36 V, cathode current range −100 to +150 mA. Dynamic impedance ~0.15 Ω typ. (0.5 Ω max) at f ≤ 1 kHz.
3 A passive Anode. Common/return terminal for the shunt reference; typically tied to circuit ground in shunt/series regulator topologies. Reference input voltage and cathode voltage are measured with respect to this pin.

Key specifications

Parameter Value
Manufacturer LRC
Package SOT-23
Category PMIC
Pins 3

Ordering variants

  • LR431ATSLT1G
  • LR431ATSLT1GLR431BTSLT1G
  • LR431ATSLT1GLR431APTSLT1G
  • LR431ATSLT1GLR431BPTSLT1G

CAD (KiCad official)

  • Symbol: LR431ATSLT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: LRC datasheet (None pp, sha256 cb186c186cf5aa67, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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