component
LM431BCM3X-TP
Public Unreviewedby Ray
TECH PUBLIC Voltage Reference, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM431BCM3X-TP
TECH PUBLIC · Voltage Reference · SOT-23
LM431BCM3X-TP 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 | ANODE | power_in | Anode terminal - the reference/return terminal of the shunt regulator. All voltages are referenced to this pin; typically tied to circuit ground. |
| 2 | REF | input | Reference input. Internal error amplifier compares this pin to the internal 2.495 V bandgap; connect the R1/R2 divider tap here to program Vka. Reference input current ~0.7 uA typ, 4.0 uA max; max Iref rating 10 mA. |
| 3 | CATHODE | power_out | Cathode terminal - the regulated/shunt terminal. Sinks the cathode current (Ika 1-100 mA operating, 150 mA abs max) to hold Vka = Vref(1 + R1/R2). Vka max rating 36 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
Same part, different packaging or reel option.
LM431BCM3X-TP
CAD (KiCad official)
- Symbol:
LM431BCM3X-TP - 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: TECH PUBLIC datasheet (5 pp, sha256
34db33196b28971a, 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).