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CJ7912
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Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+38@@ -0,0 +1,38 @@+# CJ7912++**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2L++CJ7912 from Changjing, in a TO-252-2L. 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 | Common ground reference. On the TO-252-2L package pin 1 is also the tab/DAP (D-Pak) heatsink connection. |+| 2 | IN | power_in | Negative unregulated input supply. Operating range -14.5 V to -30 V (absolute maximum -35 V). Requires a 2.2 µF input capacitor (Ci) to ground for stability. |+| 3 | OUT | power_out | Regulated -12 V negative output. Delivers up to 1.5 A peak (2.1 A typical current-limit). Requires a 1 µF output capacitor (Co) to ground for transient response and stability. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | TO-252-2L |+| Category | PMIC |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `CJ7912`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: TO-252-2L (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Changjing datasheet](docs/cj7912-datasheet.pdf) (3 pp, sha256 `7a1b26ae9a6e522f`, 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/cj7912-datasheet.pdf)
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