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LD1117ASTR
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STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+51@@ -0,0 +1,51 @@+# LD1117ASTR++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-3++LD1117ASTR 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 | ADJ/GND | input | Adjust pin (adjustable version) - connect to a resistor divider from VOUT to set the output voltage, where VOUT = 1.25 V x (1 + R2/R1) + IADJ x R2. In fixed-voltage variants this pin is the device ground. |+| 2 | VOUT | power_out | Regulated output. For the adjustable LD1117ASTR (this variant), VOUT is programmed via the ADJ divider from VREF = 1.25 V. Supplies up to 1 A; requires ≥10 µF for stability. The exposed TAB is internally tied to VOUT. |+| 3 | VIN | power_in | Unregulated DC input supply. Absolute maximum DC input voltage 15 V. Must exceed VOUT by the dropout voltage (typ. 1.15 V at 1 A). |+| 4 | TAB | power_out | Thermal tab, internally connected to VOUT. Solder to a copper pour for heatsinking (SOT-223 RthJA = 110 °C/W). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOT-223-3 |+| Category | PMIC |+| Pins | 4 |++## Ordering variants++- `LD1117ASTR`+- `LD1117ASTRLD1117AS12TR`+- `LD1117ASTRLD1117AS18TR`+- `LD1117ASTRLD1117AS33TR`+- `LD1117ASTRLD1117ADT-TR`+- `LD1117ASTRLD1117ADT12TR`+- `LD1117ASTRLD1117ADT18TR`+- `LD1117ASTRLD1117ADT33TR`+- `LD1117ASTRLD1117AV33`++## CAD (KiCad official)++- Symbol: `LD1117ASTR`+- 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](docs/ld1117astr-datasheet.pdf) (24 pp, sha256 `c2dd41daa75f2827`, 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/ld1117astr-datasheet.pdf)
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