LM7805S from HGSEMI, in a TO-263-3. 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	VCC	power_in	Unregulated positive input supply. Absolute maximum VIN = 35 V; for +5 V output, recommended VI = 7.5 V to 35 V. A 0.33 uF ceramic bypass capacitor should be placed close to this pin to ground.
2	GND	power_in	Common ground reference for both input and output. On the TO-263 package this pin is electrically connected to the tab / thermal pad, which is also the primary heat-sink path.
3	OUT	power_out	Regulated +5.0 V output (4.80 V to 5.20 V at VI=10 V, Io=0.5 A). Capable of sourcing up to IOM = 1.2 A. A 0.1 uF ceramic (and optional 10 uF bulk) capacitor to ground is recommended for stability.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	TO-263-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

LM7805SS/TR
LM7805ST
LM7805SS2/TR

CAD (KiCad official)

Symbol: LM7805S
Footprint: Package_TO_SOT_SMD:TO-263-2
3D model: TO-263-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm7805s.step`	108 KB	You want the bare part, or you mark your own boards.
`lm7805s-etched.step`	1.4 MB	You want the part with `LM7805S` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 359 faces against 79 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: HGSEMI datasheet (11 pp, sha256 7c51292380972d4a, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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