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KIA431BM-RTK

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by Ray

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

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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

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KIA431BM-RTK

KEC Semicon · Voltage Reference · SOT-23

KIA431BM-RTK from KEC Semicon, 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 to the internal 2.495 V comparator/error amplifier. When VREF rises above the internal 2.5 V bandgap, the cathode sinks current. Iref typ. 1.8 μA (max 4.0 μA at 25 °C), max continuous input current −0.05 to 10 mA.
2 K output Cathode of the internal shunt element. Sinks 1.0-100 mA when REF exceeds 2.495 V. Continuous IK rated −100 to 150 mA; VKA max 37 V; off-state Ioff 2.6 nA typ (1 μA max) at VKA=36 V.
3 A power_in Anode - common ground return for the internal error amplifier and shunt transistor. Typically tied to the low-side reference node in the regulator loop.

Key specifications

Parameter Value
Manufacturer KEC Semicon
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • KIA431BM-RTK
  • KIA431BM-RTK-AT
  • KIA431BM-RTKB-AT
  • KIA431BM-RTKA-AT
  • KIA431BM-RTKZ-AT
  • KIA431BM-RTK(blank)
  • KIA431BM-RTKF-RTF
  • KIA431BM-RTKBF-RTF
  • KIA431BM-RTKAF-RTF
  • KIA431BM-RTKZF-RTF

CAD (KiCad official)

  • Symbol: KIA431BM-RTK
  • 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: KEC Semicon datasheet (7 pp, sha256 8eafef7a8a3f5a44, 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