CJ78L08 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	OUT	power_out	Regulated +8 V output (Vo = 7.6-8.4 V). Rated for continuous output current up to 100 mA. Requires a bypass capacitor (typ. 0.1 µF) to ground placed close to the pin for stability and transient response.
2	GND	power_in	Common ground reference for input and output. Also serves as the thermal tab connection on the SOT-89-3L package (die-attach flag).
3	IN	power_in	Unregulated input supply, Vi up to 30 V absolute max (recommended operating range ≥ ~10.5 V for full regulation to 8 V). Requires an input bypass capacitor (typ. 0.33 µF) close to the pin.

Key specifications

Parameter	Value
Manufacturer	Changjing
Package	SOT-89-3
Category	PMIC
Pins	3

CAD (KiCad official)

Symbol: CJ78L08
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cj78l08.step`	57 KB	You want the bare part, or you mark your own boards.
`cj78l08-etched.step`	1.1 MB	You want the part with `CJ78L08` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 300 faces against 42 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Changjing datasheet (1 pp, sha256 cd5764838a01b2a4, 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