CJ78M05 from Changjing, in a TO-252-2L. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	IN	power_in	Unregulated positive input voltage. Operates 7V-25V typical, 35V absolute max. A 0.33μF bypass capacitor (Ci) is recommended close to the pin for stability.
2	GND	power_in	Common ground reference for input and output. Also electrically connected to the tab/heatsink of the TO-252-2L package.
3	OUT	power_out	Regulated +5V output (4.75V-5.25V over temp). Delivers up to 0.5A peak with short-circuit current limited to ~300mA. A 0.1μF output capacitor (Co) is recommended for transient response.

Key specifications

Parameter	Value
Manufacturer	Changjing
Package	TO-252-2L
Category	PMIC
Pins	3

CAD (KiCad official)

Symbol: CJ78M05
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252-2L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cj78m05.step`	119 KB	You want the bare part, or you mark your own boards.
`cj78m05-etched.step`	1.6 MB	You want the part with `CJ78M05` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 395 faces against 83 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 538caec2c212b748, 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