CJ7805 from Changjing, in a TO-220. 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	IN	power_in	Unregulated positive input voltage. Absolute maximum 35V; recommended 7V-25V for a regulated 5V output. Decouple with a 0.33 uF ceramic input capacitor (Ci) close to the pin.
2	GND	power_in	Common ground reference for both input and output. Tied to the TO-220-3L tab (thermal pad) in this package.
3	OUT	power_out	Regulated +5V output, 4.75V-5.25V over 0-125 C. Delivers up to 1.5A continuous (peak 2.2A) with internal short-circuit current limit of ~230 mA into a hard short. Decouple with a 0.1 uF ceramic output capacitor (Co).

Key specifications

Parameter	Value
Manufacturer	Changjing
Package	TO-220
Category	PMIC
Pins	3

CAD (KiCad official)

Symbol: CJ7805
Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
3D model: TO-220 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cj7805.step`	83 KB	You want the bare part, or you mark your own boards.
`cj7805-etched.step`	695 KB	You want the part with `CJ7805` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 179 faces against 48 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 (3 pp, sha256 c68a5285deb97b2b, 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