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CJ79L12
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Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+38@@ -0,0 +1,38 @@+# CJ79L12++**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L++CJ79L12 from Changjing, in a SOT-89-3L. 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 / common return for the negative regulator. Also connected to the SOT-89 tab. |+| 2 | IN | power_in | Unregulated negative input voltage. Operating range roughly -14.5 V to -27 V; absolute maximum -35 V. Bypass with ~0.33 µF close to the pin. |+| 3 | OUT | power_out | Regulated -12 V output (±0.5 V at 25 °C). Delivers up to 100 mA (IOM 0.1 A). Bypass with ~0.1 µF close to the pin for transient response. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | SOT-89-3L |+| Category | PMIC |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `CJ79L12`+- Footprint: `Package_TO_SOT_SMD:SOT-89-3`+- 3D model: SOT-89-3L (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](docs/cj79l12-datasheet.pdf) (1 pp, sha256 `ff22f0f43dcb07f7`, 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/cj79l12-datasheet.pdf)
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