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LD1117-3.3
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UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+44@@ -0,0 +1,44 @@+# LD1117-3.3++**UMW** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223++LD1117-3.3 from UMW, in a SOT-223. Pinout and pin descriptions extracted from the datasheet (via LCSC) by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | GND | power_in | Ground reference for the fixed-output LD1117-3.3 variant. On the shared die this pin is the ADJ/GND pad (adjustable variants use it as the ADJ feedback node); for the fixed 3.3V part it must be tied to system ground. |+| 2 | VOUT | power_out | Regulated 3.3V output (3.234V min / 3.300V typ / 3.366V max at Iout=10mA, Vin=5V, Tj=25°C). Delivers up to 1A. Requires an output capacitor for stability; a 22µF tantalum is recommended. |+| 3 | VIN | power_in | Unregulated input supply. Recommended operating range up to 12V, absolute maximum 18V. Typical dropout is 1.2V at 1A load. A 10µF input capacitor is recommended. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOT-223 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `LD1117-3.33.3`+- `LD1117-3.3CD-3.3`+- `LD1117-3.3S-3.3`++## CAD (KiCad official)++- Symbol: `LD1117-3.3`+- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`+- 3D model: SOT-223 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UMW datasheet](https://datasheet.lcsc.com/datasheet/pdf/1a7f277cc1171afc7d6650cbbfc8365b.pdf) (14 pp, sha256 `b65a8249b6e9e313`, 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/ld1117-3-3-datasheet.pdf)
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