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NCP431AVSNT1G

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

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3D Model

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Symbol & Footprint

Schematic Symbol

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Datasheet

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Contents

README

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NCP431AVSNT1G

ON Semiconductor · Voltage Reference · SOT-23

NCP431AVSNT1G from ON Semiconductor, 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 Cathode passive Cathode (K) of the shunt regulator. Sinks the programmed shunt current (40 uA min to 100 mA max). Cathode-to-anode voltage is regulated to Vref*(1+R1/R2)+Iref*R1.
2 Reference input Reference (R) input pin to the internal error amplifier. Regulation loop drives cathode current until this pin equals internal Vref = 2.500 V. Iref typical 81 nA.
3 Anode passive Anode (A) of the shunt regulator; return path for cathode current. Typically tied to system ground or the bottom of the R1/R2 divider.

Key specifications

Parameter Value
Manufacturer ON Semiconductor
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • NCP431AVSNT1G
  • NCP431AVSNT1GLPG
  • NCP431AVSNT1GLPRAG
  • NCP431AVSNT1GLPRPG
  • NCP431AVSNT1GDG
  • NCP431AVSNT1GDR2G

CAD (KiCad official)

  • Symbol: NCP431AVSNT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ncp431avsnt1g-etched.step / ncp431avsnt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncp431avsnt1g.step / ncp431avsnt1g.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ncp431avsnt1g.step 59 KB You want the bare part, or you mark your own boards.
ncp431avsnt1g-etched.step 1.9 MB You want the part with NCP431AVSNT1G already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 474 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: ON Semiconductor 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