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TS431ILT

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STMicroelectronics Voltage Reference, SOT-23-5. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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TS431ILT

STMicroelectronics · Voltage Reference · SOT-23-5

TS431ILT from STMicroelectronics, in a SOT-23-5. 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 NC unconnected No connect pin with no internal function stated in the datasheet.
2 NC unconnected Do not connect this pin or connect it to Anode, per the datasheet footnote.
3 Cathode passive Cathode of the shunt reference, operating cathode current 0.06 to 30 mA and cathode-to-anode voltage 1.24 to 6 V (absolute maximum 10 V).
4 Reference input Reference input that sets the cathode voltage via an external divider, with Vref typically 1.24 V and absolute maximum input current of -0.05 to +3 mA.
5 Anode power_in Anode of the shunt reference, connected to the lowest circuit potential (ground).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output voltage Vref 1.215 1.24 1.265 V VKA = Vref at Ik = 100 µA (TS431 2% column) 5
Output voltage change over temperature, 0 < Tamb < +70 °C Vref 9 mV Ik = 100 µA, VKA = Vref, 0 < Tamb < +70 °C 5
Output voltage change over temperature, -40 < Tamb < +85 °C Vref 16 mV Ik = 100 µA, VKA = Vref, -40 < Tamb < +85 °C 5
Output voltage change over temperature, -40 < Tamb < +105 °C Vref 18 mV Ik = 100 µA, VKA = Vref, -40 < Tamb < +105 °C 5
Output voltage change over temperature, -40 < Tamb < +125 °C Vref 21 mV Ik = 100 µA, VKA = Vref, -40 < Tamb < +125 °C 5
Ratio of change in reference input voltage to change in cathode to anode voltage 1.8 2.7 mV/V Ik = 10 mA, VKA = 6 V to Vref 5
Reference input current Iref 70 160 nA Ik = 10 mA 5
Reference input current deviation over temperature range, -40 < Tamb < +85 °C Iref 70 160 nA Ik = 10 mA, R1 = 10 k, R2 = (symbol lost in extraction), -40 < Tamb < +85 °C 5
Reference input current deviation over temperature range, -40 < Tamb < +125 °C Iref 90 240 nA Ik = 10 mA, R1 = 10 k, R2 = (symbol lost in extraction), -40 < Tamb < +125 °C 5
Minimum cathode current for regulation Imin 40 60 µA VKA = Vref 5
Off-state cathode current Ioff 0.001 0.1 µA VKA = 6 V, Vref = 0 5
Static impedance RKA 0.2 0.4 Ω VKA = Vref, Ik = 0.1 to 15 mA 5
Cathode to anode voltage VKA 1.24 6 V 4
Cathode current Ik 0.06 30 mA 4
Operating free air temperature range Toper -40 125 °C 4
Cathode to anode voltage VKA 10 V 4
Continuous cathode current range Ik -20 40 mA 4
Reference input current range Iref -0.05 3 mA 4
Power dissipation Pd 500 mW SOT23-5 package 4
Storage temperature range Tstg -65 150 °C 4
Thermal resistance junction to ambient RthJA 250 °C/W SOT23-5L 4
Thermal resistance junction to case RthJC 136 °C/W SOT23-5L 4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing Abs Figure 2. Pinout L SOT23-5 (plastic micropackage) Absolute maximum ratings and operating conditions TS431 3

CAD (KiCad official)

  • Symbol: TS431ILT
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: ts431ilt-etched.step / ts431ilt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ts431ilt.step / ts431ilt.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (16 pp, sha256 ec56fdab04a9692d, retrieved 2026-10-21, 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