component

TP431R124S3

Public Made by Adom

by adom

TECH PUBLIC Voltage Reference, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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TP431R124S3

TECH PUBLIC · Voltage Reference · SOT-23

TP431R124S3 from TECH PUBLIC, 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 error amplifier's non-inverting input, compared against the internal 1.24 V bandgap. Tie to the R1/R2 divider between CATHODE and ANODE to program the regulated cathode voltage: V_KA = V_REF*(1 + R1/R2) + I_REF*R1. Reference input current is 0.7 uA typ (4 uA max); input current range up to 10 mA absolute max.
2 CATHODE passive Cathode (K) of the shunt regulator; sinks the regulated current. Operates from 0.1 mA to 100 mA (150 mA abs max), V_KA up to 18 V. Dynamic impedance 0.05 Ω typ (I_K = 1 mA-100 mA, f <= 1 kHz).
3 ANODE passive Anode (A) of the shunt regulator; the voltage reference for the device. All V_KA / V_REF voltages in the datasheet are referenced to this pin (typically tied to system ground in shunt regulator use).

Key specifications

Parameter Value
Manufacturer TECH PUBLIC
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • TP431R124S3

CAD (KiCad official)

  • Symbol: TP431R124S3
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: tp431r124s3-etched.step / tp431r124s3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tp431r124s3.step / tp431r124s3.glb are the bare package body.

Provenance

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

  • Datasheet: TECH PUBLIC datasheet (5 pp, sha256 49ad40746023bd63, 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