LTL431ATSLT1G

@@ -0,0 +1,45 @@+# LTL431ATSLT1G++**LRC** · Voltage Reference · SOT-23++LTL431ATSLT1G from LRC, 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 | CATHODE | passive | Cathode (K) terminal of the shunt regulator. Sinks current (typ 1-100 mA, absolute max -100 to +150 mA) to regulate the cathode-to-anode voltage. Cathode voltage may be set from Vref (~2.5V) up to 36V. Dynamic impedance ~0.2 Ω. |+| 2 | REF | input | Reference (R) input pin. Internally compared against the 2.5V bandgap reference; the device regulates so that this pin sits at Vref (typ 2.495-2.50 V). Typical reference input current ~1 µA (max 2 µA). Connect to the R1/R2 divider from cathode to set output voltage: VKA = Vref x (1 + R1/R2) + Iref x R1. |+| 3 | ANODE | passive | Anode (A) terminal, typically tied to circuit ground / return. Return path for the cathode sink current and the internal reference amplifier. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | LRC |+| Package | SOT-23 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `LTL431ATSLT1G`+- `LTL431ATSLT1GLTL431BTSLT1G`+- `LTL431ATSLT1GLTL431APTSLT1G`+- `LTL431ATSLT1GLTL431BPTSLT1G`++## CAD (KiCad official)++- Symbol: `LTL431ATSLT1G`+- 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:** [LRC datasheet](docs/ltl431atslt1g-datasheet.pdf) (5 pp, sha256 `a9ab6fd3d1d0d015`, 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](docs/ltl431atslt1g-datasheet.pdf)

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