component
LM4431M3-2.5
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Texas Instruments Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+39@@ -0,0 +1,39 @@+# LM4431M3-2.5++**Texas Instruments** · Voltage Reference · SOT-23++LM4431M3-2.5 from Texas Instruments, 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 | + | passive | The "+" terminal of the 2.5 V shunt reference, which sets a reverse breakdown voltage of 2.500 V typical at IR = 100 µA; the operating current range is 100 µA to 15 mA. |+| 2 | − | passive | The "−" terminal of the shunt reference, which the datasheet identifies as the cathode-side reference for the parasitic Schottky diode to pin 3; the operating reverse current is 100 µA to 15 mA and the forward current limit is 10 mA. |+| 3 | NC (die attach interface contact) | unconnected | Die attach interface contact with a parasitic Schottky diode to pin 2; it must be left floating or connected to pin 2. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOT-23 |+| Category | Power Management (PMIC) |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `LM4431M3-2.5`+- Footprint: `Package_TO_SOT_SMD:SOT-23`+- 3D model: SOT-23 (KiCad packages3D, STEP)+- 3D model files: `lm4431m3-2-5-etched.step` / `lm4431m3-2-5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4431m3-2-5.step` / `lm4431m3-2-5.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm4431) (16 pp, sha256 `aae3a4af89708708`, retrieved 2026-10-07, 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](docs/lm4431m3-2-5-datasheet.pdf)
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