LD1117S12TR

@@ -0,0 +1,47 @@+# LD1117S12TR++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-3++LD1117S12TR from STMicroelectronics, in a SOT-223-3. 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 | GND | power_in | Ground / common return. Reference for the internal 1.25 V bandgap and the fixed 1.2 V output. |+| 2 | VOUT | power_out | Regulated 1.2 V output. Supplies up to 800 mA. Requires a minimum 10 µF capacitor to ground for loop stability. Internally connected to the SOT-223 tab. |+| 3 | VIN | power_in | Unregulated DC input supply. Absolute maximum 15 V (18 V when IOUT < 20 mA). Must be at least ~1 V above VOUT for regulation. A 100 nF bypass capacitor to GND is recommended. |+| 4 | TAB | power_out | Metal tab used for heat sinking, internally connected to VOUT. Solder to a copper pour on the PCB to improve thermal dissipation. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOT-223-3 |+| Category | PMIC |+| Pins | 4 |++## Ordering variants++- `LD1117S12TRS12TR`+- `LD1117S12TRS12`+- `LD1117S12TRD`+- `LD1117S12TRDT`+- `LD1117S12TRV`++## CAD (KiCad official)++- Symbol: `LD1117S12TR`+- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`+- 3D model: SOT-223-3 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/ld1117s12tr.pdf) (44 pp, sha256 `1b80923ec6ca9161`, retrieved 2026-08-17, tier: manufacturer)+- **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/ld1117s12tr-datasheet.pdf)

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