LD1117-1.2

@@ -0,0 +1,44 @@+# LD1117-1.2++**UMW** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223++LD1117-1.2 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 | ADJ/GND | power_in | Ground return for fixed-output versions (LD1117-1.2 ties this pin to system ground). On adjustable variants this is the ADJ feedback node driven by the external R1/R2 divider; adjust-pin current is typically 60 uA (max 120 uA). |+| 2 | VOUT | power_out | Regulated 1.2 V output (min 1.176 V, max 1.224 V at Iout = 10 mA, Vin = 3.2 V, Tj = 25 C). Sources up to 1 A; requires a 22 uF tantalum (or equivalent) output capacitor for stability. Internally protected by current limit (1.25-1.6 A) and thermal shutdown (~150 C). |+| 3 | VIN | power_in | Unregulated input supply. Recommended operating input voltage up to 12 V; absolute maximum 18 V. Bypass with a 10 uF capacitor close to the pin. Vin must exceed Vout by at least the dropout voltage (typ 1.2 V at 1 A). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOT-223 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `LD1117-1.2`+- `LD1117-1.2CD`+- `LD1117-1.2S`++## CAD (KiCad official)++- Symbol: `LD1117-1.2`+- 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/ld1117-1-2-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/ld1117-1-2-datasheet.pdf)

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