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LD1117-2.5
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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 @@+# LD1117-2.5++**UMW** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223++LD1117-2.5 from UMW, in a SOT-223. 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 / device reference return. In the fixed-output LD1117-2.5, the pin-1 ADJ/GND node functions as GND (the internal feedback F1/F2 divider is connected and the A switch is disconnected per the block diagram). |+| 2 | VOUT | power_out | Regulated 2.5V output (2.450V-2.550V typ. at IOUT=10mA, VIN=4.5V, TJ=25°C). Supplies up to 1A load current. Requires an output capacitor for stability; on SOT-223 the tab is electrically connected to VOUT and serves as the primary heatsink. |+| 3 | VIN | power_in | Unregulated input supply. Absolute maximum 18V; recommended operating input 12V max. For fixed 2.5V output the minimum VIN must exceed VOUT + dropout (~1.2V @ 1A). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOT-223 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `LD1117-2.5`+- `LD1117-2.5LD1117CD-2.5`+- `LD1117-2.5LD1117S-2.5`++## CAD (KiCad official)++- Symbol: `LD1117-2.5`+- 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](docs/ld1117-2-5-datasheet.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/ld1117-2-5-datasheet.pdf)
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