MS78L05 from MSKSEMI, in a SOT-89. 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	VO	power_out	Regulated output voltage pin. Provides fixed +5.0V (typ) at up to 100mA. Recommended 0.1µF ceramic bypass capacitor to GND.
2	GND	power_in	Ground reference. Common return for input and output. On SOT-89 this is the large center tab (pin 2) that also serves as the thermal pad.
3	VI	power_in	Unregulated input voltage. For 5V output typical range is 7V to 20V (absolute max 30V). Recommended 0.33µF input bypass capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	MSKSEMI
Package	SOT-89
Category	PMIC
Pins	3

CAD (KiCad official)

Symbol: MS78L05
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ms78l05.step`	57 KB	You want the bare part, or you mark your own boards.
`ms78l05-etched.step`	1.1 MB	You want the part with `MS78L05` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 306 faces against 42 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: MSKSEMI datasheet (9 pp, sha256 1d7862d8017d42d4, 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