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NCP431AISNT1G

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

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Datasheet

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Contents

README

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NCP431AISNT1G

onsemi · Voltage Reference · SOT-23

NCP431AISNT1G from onsemi, 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. High-impedance sense input compared internally to the 2.500 V bandgap; typical input bias current 81 nA (max 190 nA). Divider tap from Cathode via R1/R2 sets the regulated cathode voltage per VKA = Vref * (1 + R1/R2) + Iref * R1.
2 K passive Cathode. Regulated shunt terminal; sinks current from Vref up to 100 mA when the reference input exceeds the internal 2.5 V bandgap. Minimum cathode current for regulation is ~40 μA (max 60 μA). Absolute max VKA = 37 V.
3 A passive Anode. Common/return terminal of the shunt regulator; typically tied to circuit ground in a standard programmable-reference configuration.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • NCP431AISNT1G
  • NCP431AISNT1GLPRAG
  • NCP431AISNT1GLPRPG
  • NCP431AISNT1GLPG
  • NCP431AISNT1GDR2G
  • NCP431AISNT1GDG

CAD (KiCad official)

  • Symbol: NCP431AISNT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ncp431aisnt1g-etched.step / ncp431aisnt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncp431aisnt1g.step / ncp431aisnt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (17 pp, sha256 04583e51cf5b3037, retrieved 2026-08-17, tier: manufacturer)
  • 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