CJ78D05 from Changjing, in a TO-252-2L. 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 7.5 V to 25 V (absolute max 35 V). Bypass to GND with a 0.33 uF ceramic capacitor located close to the pin.
2	GND	power_in	Ground reference for both the input and output. Also electrically connected to the exposed tab of the TO-252 package (thermal pad).
3	OUT	power_out	Regulated +5 V output (4.8-5.2 V at 25 C, 5 mA to 1 A). Requires a 0.1 uF output capacitor to GND for stability. Continuous output current up to 1 A subject to thermal derating (PD = 1.25 W, RthetaJA = 80 C/W).

Key specifications

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

CAD (KiCad official)

Symbol: CJ78D05
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
`cj78d05.step`	119 KB	You want the bare part, or you mark your own boards.
`cj78d05-etched.step`	1.6 MB	You want the part with `CJ78D05` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 398 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 736850389e63ebba, 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