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BL1117-33CY
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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+46@@ -0,0 +1,46 @@+# BL1117-33CY++**BL Shanghai Belling** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)++BL1117-33CY 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 / device reference. Return path for quiescent current (typ. 2mA, max 5mA) and load current up to 1A. Connect directly to the system ground plane. |+| 2 | Vout | power_out | Regulated 3.3V output (min 3.234V, typ 3.3V, max 3.366V). Supplies up to 1A load current with 10mV typical load regulation. Requires a 10µF tantalum or MLCC output capacitor for stability. |+| 3 | Vin | power_in | Unregulated input supply. Operating range up to 12V (absolute max 15V). Must be ≥ Vout + 1.3V dropout at 1A. Bypass with a 10µF tantalum or MLCC capacitor as close to the pin as possible. |+| 4 | Vout(Tab) | power_out | Exposed metal tab of the TO-252 (DPAK) package. Electrically fused to pin 2 (Vout) as is standard for this device family. Solder to a large copper pour to sink heat (θJC ≈ 10°C/W); this is the primary heat-dissipation path. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | TO-252-2(DPAK) |+| Category | PMIC |+| Pins | 4 |++## Ordering variants++- `BL1117-33CY33CY`+- `BL1117-33CY33AY`+- `BL1117-33CY33CX`+- `BL1117-33CY33AX`++## CAD (KiCad official)++- Symbol: `BL1117-33CY`+- 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/bl1117-33cy-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/bl1117-33cy-datasheet.pdf)
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