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CJA1117B-3.3
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Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+46@@ -0,0 +1,46 @@+# CJA1117B-3.3++**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3++CJA1117B-3.3 from Changjing, in a SOT-89-3. 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 / adjust reference pin. On the fixed 3.3V version this pin is the device ground return; internally tied to the reference divider (labeled ADJ/GND on the package). |+| 2 | OUTPUT | power_out | Regulated 3.3V output. Delivers up to 1A. Requires a 22 uF tantalum (or equivalent) output capacitor for stability per the typical application circuit. |+| 3 | IN | power_in | Unregulated input supply. Recommended operating input voltage up to 15V (absolute max 20V). For a 3.3V output, VIN must be at least 4.8V for full load regulation. A 10 uF tantalum input capacitor is recommended. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | SOT-89-3 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `CJA1117B-3.3`+- `CJA1117B-3.3CJA1117B-ADJ`+- `CJA1117B-3.3CJA1117B-1.8`+- `CJA1117B-3.3CJA1117B-2.5`+- `CJA1117B-3.3CJA1117B-5.0`++## CAD (KiCad official)++- Symbol: `CJA1117B-3.3`+- Footprint: `Package_TO_SOT_SMD:SOT-89-3`+- 3D model: SOT-89-3 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](docs/cja1117b-3-3-datasheet.pdf) (6 pp, sha256 `fc47d4c515190804`, 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/cja1117b-3-3-datasheet.pdf)
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