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CJ78L12
Public Made by Adomby adom
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 @@+# CJ78L12++**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L++CJ78L12 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 | OUT | power_out | Regulated +12 V output. Delivers up to 100 mA (0.1 A max). A 0.1 μF ceramic bypass capacitor to GND close to the pin is recommended for transient response and stability. |+| 2 | GND | power_in | Common ground reference for both input and output. The SOT-89 tab is connected to this pin and acts as the thermal path to the PCB. |+| 3 | IN | power_in | Unregulated input supply. Absolute maximum 35 V; must exceed VO by at least the dropout voltage (~1.7 V typ). A 0.33 μF input bypass capacitor to GND close to the pin is recommended. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Changjing |+| Package | SOT-89-3L |+| Category | PMIC |+| Pins | 3 |++## CAD (KiCad official)++- Symbol: `CJ78L12`+- 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/cj78l12-datasheet.pdf) (2 pp, sha256 `61a9aa2702ef7efa`, 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/cj78l12-datasheet.pdf)
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