CJ78L05 from Changjing, in a SOT-89-3L. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	OUT	power_out	Regulated +5 V output. Nominal 5.0 V (4.75 V to 5.25 V over full load/line). Recommend 0.1 uF ceramic bypass capacitor close to the pin for transient response.
2	GND	power_in	Common ground return for input and output. Also acts as the package heatsink tab (SOT-89 large center pad) for thermal dissipation.
3	IN	power_in	Unregulated DC input. Recommended operating range 7 V to 20 V; absolute maximum 30 V. Requires 0.33 uF bypass capacitor close to the pin when the regulator is far from the input filter.

Key specifications

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

CAD (KiCad official)

Symbol: CJ78L05
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89-3L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cj78l05.step`	57 KB	You want the bare part, or you mark your own boards.
`cj78l05-etched.step`	1.1 MB	You want the part with `CJ78L05` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 288 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 (4 pp, sha256 7bd7279ca9a27801, 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