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S-LR431AKLT1G

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

componentpower management (pmic)s-lr431aklt1gfactory-2.0.0extractor-text
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S-LR431AKLT1G

LRC · Voltage Reference · SOT-23

S-LR431AKLT1G from LRC, 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 Ref input Reference input that the regulator servos to the internal 2.5 V (approximately Vref) through an external resistor divider, with reference input current rated -0.05 to +10 mA in the absolute maximum ratings.
2 Cathode passive Cathode (output) terminal, adjustable from Vref up to 36 V with two external resistors, with a sink current capability of 0.1 mA to 100 mA and continuous cathode current rated -100 to +150 mA.
3 Anode passive Anode terminal, the common return of the shunt path, which the datasheet identifies only by its function in the block diagram and pinout.

Key specifications

Parameter Value
Manufacturer LRC
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
Reference Input Voltage (0.5% grade) Vref 2.488 2.5 2.512 V VKA=VREF, IKA=10mA 2
Deviation of reference input voltage over temperature Vref 8 17 mV VKA=VREF, IKA=10mA, TA=TMIN to TMAX 2
Dynamic Impedance ZKA 0.1 0.37 Ω VKA=VREF, IKA=0.2 to 100mA, f 1.0kHz 2
Cathode Current Range (Continuous) IKA -100 150 mA 2
Reference Input Current Range Iref -0.05 10 mA 2
Operating Junction Temperature Tj 150 °C 2
Storage Temperature Tstg -65 150 °C 2
Operating Ambient Temperature (grade range) Topr -40 125 °C 2
Cathode Current IKA 100 mA 2
Thermal Resistance Junction-to-Ambient θJA 206 °C/W 2

CAD (KiCad official)

  • Symbol: S-LR431AKLT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: s-lr431aklt1g-etched.step / s-lr431aklt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); s-lr431aklt1g.step / s-lr431aklt1g.glb are the bare package body.

Provenance

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

  • Datasheet: LRC datasheet (5 pp, sha256 386e1e16926acbb8, 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