LD1117S33CTR

@@ -0,0 +1,49 @@+# LD1117S33CTR++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4++LD1117S33CTR from STMicroelectronics, in a SOT-223-4. 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 | Device ground / common reference. Also carries the internal adjust/reference return current. |+| 2 | VOUT | power_out | Regulated 3.3 V output, up to 800 mA. Requires a minimum 10 µF capacitor to ground for stability. The exposed SOT-223 tab is internally connected to this pin. |+| 3 | VIN | power_in | Unregulated input supply. Absolute max 15 V DC (18 V when IOUT < 20 mA). A 100 nF input capacitor is recommended near the pin. |+| 4 | TAB | passive | SOT-223 heat-sink tab, internally tied to VOUT. Solder to a copper pour for thermal dissipation; the pour is at VOUT potential. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOT-223-4 |+| Category | PMIC |+| Pins | 4 |++## Ordering variants++- `LD1117S33CTRS33CTR`+- `LD1117S33CTRV33`+- `LD1117S33CTRV33C`+- `LD1117S33CTRDT33`+- `LD1117S33CTRDT33TR`+- `LD1117S33CTRD33`+- `LD1117S33CTRD33TR`++## CAD (KiCad official)++- Symbol: `LD1117S33CTR`+- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`+- 3D model: SOT-223-4 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/ld1117s33ctr.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/ld1117s33ctr-datasheet.pdf)

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