CJ7812 from Changjing, in a TO-252-2. 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. Operating range 14.5 V to 30 V (absolute maximum 35 V) with respect to GND. Bypass with a 0.33 µF capacitor located as close as possible to the regulator for stability.
2	GND	power_in	Common ground reference for the input and output. On the TO-252-2L package this terminal is also fused to the exposed thermal tab (drain pad).
3	OUT	power_out	Regulated +12 V output (11.4 V to 12.6 V over temperature). Delivers up to 1.5 A peak with typical dropout of 2 V at 1.0 A. Bypass with a 0.1 µF capacitor for optimum transient response.

Key specifications

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

CAD (KiCad official)

Symbol: CJ7812
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252-2 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cj7812.step`	119 KB	You want the bare part, or you mark your own boards.
`cj7812-etched.step`	1.3 MB	You want the part with `CJ7812` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 339 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 8c91d1a4faef8059, 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