SK1117-3.3 from Shikues, in a SOT-223. 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	GND	power_in	Ground / common return. On the fixed-output SK1117-3.3 version this pin is the device ground reference (labeled VSS/ADJ in the pinout table; on the ADJ part it is the feedback ADJ pin, on fixed parts it is GND). Tie to the single-point ground of the application.
2	VOUT	power_out	Regulated 3.3V output (3.234V min / 3.3V typ / 3.366V max at 0<=Iout<=1A, Vin=4.6V). Requires a 10uF tantalum bypass capacitor to ground for stability.
3	VIN	power_in	Unregulated input supply. Typical 15V, absolute max 18V; must be at least Vout + Vdrop (Vdrop ~1.1V at 1A). Recommend a 10uF tantalum bypass capacitor to ground.
4	VOUT	power_out	Regulated 3.3V output tab (large SOT-223 heat-slug pad, internally connected to pin 2). Also serves as the primary thermal dissipation path; solder to a copper pour to lower thermal resistance (SOT-223 theta_JC ~20 C/W).

Key specifications

Parameter	Value
Manufacturer	Shikues
Package	SOT-223
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

SK1117-3.3

CAD (KiCad official)

Symbol: SK1117-3.3
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sk1117-3-3.step`	64 KB	You want the bare part, or you mark your own boards.
`sk1117-3-3-etched.step`	1.5 MB	You want the part with `SK1117-3.3` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 389 faces against 75 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: Shikues datasheet (10 pp, sha256 e3e5f9a414ebb08b, 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