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TL431M-A

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Foshan Blue Rocket Elec Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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TL431M-A

Foshan Blue Rocket Elec · Voltage Reference · SOT-23

TL431M-A from Foshan Blue Rocket Elec, in a SOT-23. 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 R input Reference input of the adjustable shunt regulator, with a nominal reference voltage of 2.495 V and a continuous reference input current rating of 0.05 to +10 mA.
2 K passive Cathode of the shunt regulator, with a continuous cathode current range of -100 to +100 mA and a cathode-to-anode voltage rating of 37 V maximum.
3 A passive Anode of the shunt regulator; the datasheet gives the cathode-to-anode voltage rating of 37 V but does not state a separate anode limit.

Key specifications

Parameter Value
Manufacturer Foshan Blue Rocket Elec
Package SOT-23
Category Power Management (PMIC)
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Reference Input Voltage (A grade, 0.5%) VREF 2.483 2.495 2.507 V VKA=VREF IK=10mA (A=0.5%) 2
Deviation of Reference Input Voltage Over Temperature ΔVREF/ΔT 4.5 25 mV VKA=VREF IK=10mA TA=-40～125℃ 2
Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (10V to VREF) ΔVREF/ΔVKA -1 -2.7 mV/V IK=10mA, ΔVKA=10V to VREF 2
Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (36V to 10V) ΔVREF/ΔVKA -0.5 -2 mV/V IK=10mA, ΔVKA=36V to 10V 2
Reference Input Current IREF 0.8 1 μA IK=10mA R1=10KΩ R2=open 2
Deviation of Reference Input Current Over Full Temperature Range ΔIREF/ΔT 0.4 1.2 μA IK=10mA R1=10KΩ R2=open TA=-40～125℃ 2
Minimum Cathode Current for Regulation IK(min) 0.05 0.08 mA VKA=VREF 2
Off-state Cathode Current IK(off) 0.05 1 μA VKA=36V VREF=0V 2
Dynamic Impedance /ZKA/ 0.15 0.5 Ω VKA=VREF f≤1.0KHz IK=1mA to 100mA 2
Cathode to Anode Voltage VKA 37 V 2
Cathode Current Range, Continuous IK -100 100 mA 2
Reference Input Current Range, Continuous IREF 0.05 10 mA 2
Power Dissipation PD 370 mW Ta=25℃ (absolute maximum ratings header) 2
Operating Ambient Temperature Tamb -40 125 ℃ 2
Junction Temperature Tj 150 ℃ 2
Storage Temperature Range Tstg -65 150 ℃ 2

CAD (KiCad official)

  • Symbol: TL431M-A
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: tl431m-a-etched.step / tl431m-a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl431m-a.step / tl431m-a.glb are the bare package body.

Provenance

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

  • Datasheet: Foshan Blue Rocket Elec datasheet (7 pp, sha256 588d6cfc6c617cfc, retrieved 2026-10-09, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF