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BL1117-ADJCY
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BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+47@@ -0,0 +1,47 @@+# BL1117-ADJCY++**BL Shanghai Belling** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2++BL1117-ADJCY from BL Shanghai Belling, in a TO-252-2. 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 | input | Adjust pin. Feedback input regulated to 1.25 V (Vref) reference. Output voltage set by Vout = 1.25 x (1 + R2/R1) + IAdj x R2 using external resistor divider (R1 recommended <=125 ohm to meet minimum load, and <=625 ohm for stability). IAdj is typically 55 uA (max 120 uA). |+| 2 | Vout | power_out | Regulated output. Delivers up to 1 A. Requires a 10 uF tantalum or MLCC output capacitor for stability (ESR 3 mOhm to 22 Ohm). On TO-252 the exposed tab is electrically the Vout pin. |+| 3 | Vin | power_in | Unregulated supply input. Recommended operating range up to 12 V (absolute max 15 V). Requires a 10 uF tantalum or MLCC bypass capacitor. Must exceed Vout by at least the dropout voltage (~1.3 V at 1 A). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | TO-252-2 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++Same part, different packaging or reel option.++- `BL1117-ADJCY`+- `BL1117-ADJCYADJAY`+- `BL1117-ADJCX`+- `BL1117-ADJCYADJAX`++## CAD (KiCad official)++- Symbol: `BL1117-ADJCY`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: TO-252-2 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [BL Shanghai Belling datasheet](docs/bl1117-adjcy-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-adjcy-datasheet.pdf)
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