LM7905S 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	GND	power_in	Ground / common return for the regulator. Both input and output voltages are referenced to this pin.
2	INPUT	power_in	Unregulated negative input supply. For LM7905 operating range is -7.0 V >= VIN >= -20 V (absolute max -35 V). Requires a 2.2 uF input decoupling capacitor to ground.
3	OUTPUT	power_out	Regulated -5.0 V output (typ.), -4.82 V to -5.18 V over 5 mA to 1.0 A load. Requires >=1.0 uF output capacitor to ground 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.

LM7905SS/TR
LM7905ST
LM7905SS2/TR

CAD (KiCad official)

Symbol: LM7905S
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
`lm7905s.step`	108 KB	You want the bare part, or you mark your own boards.
`lm7905s-etched.step`	1.3 MB	You want the part with `LM7905S` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 344 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 (10 pp, sha256 7e5f09b8cf107bcf, 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