L78L05ABZ from STMicroelectronics, in a TO-92-3. 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	VOUT	power_out	Regulated +5 V output. Delivers up to 100 mA with adequate heat-sinking. A 0.1 µF output capacitor is recommended for transient response and stability.
2	GND	power_in	Common ground return for input and output. Quiescent current (~6 mA max) flows out this pin.
3	VIN	power_in	Unregulated DC input, typically 7 V to 20 V for a 5 V output (absolute max 30 V for VO = 3.3-9 V variants). A 0.33 µF input capacitor is recommended if the regulator is located far from the supply filter.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	TO-92-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

L78L05ABZZ
L78L05ABZ
L78L05ABZACZ
L78L05ABZD
L78L05ABZABD
L78L05ABZACD
L78L05ABZ13TR
L78L05ABZABD13TR
L78L05ABZACD13TR

CAD (KiCad official)

Symbol: L78L05ABZ
Footprint: Package_TO_SOT_THT:TO-92_Inline
3D model: TO-92-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`l78l05abz.step`	27 KB	You want the bare part, or you mark your own boards.
`l78l05abz-etched.step`	1.3 MB	You want the part with `L78L05ABZ` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 341 faces against 19 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: STMicroelectronics datasheet (40 pp, sha256 8b73c521b7f1b36e, 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