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BL1117-50CY
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BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+50@@ -0,0 +1,50 @@+# BL1117-50CY++**BL Shanghai Belling** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)++BL1117-50CY from BL Shanghai Belling, in a TO-252-2(DPAK). 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 reference for the regulator. Also serves as the thermal return via the DPAK tab (electrically connected to GND / tab). |+| 2 | Vout | power_out | Regulated 5.0V output, up to 1A load current. Requires a 10uF tantalum or MLCC output capacitor for stability (ESR 3mΩ~22Ω). |+| 3 | Vin | power_in | Unregulated input supply. Must be at least Vout+1.3V (dropout at 1A) up to 12V max operating (15V abs max). A 10uF input bypass capacitor is recommended. |+| TAB | GND | power_in | TO-252 (DPAK) exposed heat-slug tab, internally connected to the GND pin. Solder to a ground copper pour for heat dissipation; θJC = 10°C/W for TO-252. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | TO-252-2(DPAK) |+| Category | PMIC |+| Pins | 4 |++## Ordering variants++Same part, different packaging or reel option.++- `BL1117-50CYY`+- `BL1117-50CY`+- `BL1117-50CY50AY`+- `BL1117-50CYX`+- `BL1117-50CY50CX`+- `BL1117-50CY50AX`++## CAD (KiCad official)++- Symbol: `BL1117-50CY`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [BL Shanghai Belling datasheet](docs/bl1117-50cy-datasheet.pdf) (15 pp, sha256 `a7fe7f5c0846d4ca`, 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/bl1117-50cy-datasheet.pdf)
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