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BL1117-33CX
Public Made by Adomby adom
BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+45@@ -0,0 +1,45 @@+# BL1117-33CX++**BL Shanghai Belling** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223++BL1117-33CX from BL Shanghai Belling, 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 | GND | power_in | Ground return for the regulator. On fixed-voltage versions (including -33) this pin is the device ground reference; on the adjustable version the same pin serves as the ADJ feedback input tied to the external resistor divider. |+| 2 | VOUT | power_out | Regulated 3.3V output (3.234V-3.366V, ±2%) capable of sourcing up to 1A. Requires an output capacitor (10µF typical, compatible with tantalum, electrolytic, or MLCC) for stability. |+| 3 | VIN | power_in | Unregulated input supply, 4.8V to 16V recommended (18V absolute max). Bypass with a 10µF input capacitor close to the pin. Dropout is 1.3V at 1A load. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | SOT-223 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `BL1117-33CX33CX`+- `BL1117-33CX33AX`+- `BL1117-33CX33CY`+- `BL1117-33CX33AY`++## CAD (KiCad official)++- Symbol: `BL1117-33CX`+- 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:** [BL Shanghai Belling datasheet](docs/bl1117-33cx-datasheet.pdf) (16 pp, sha256 `fcde732a0d8dde18`, 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/bl1117-33cx-datasheet.pdf)
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