L78M05ABDT-TR from STMicroelectronics, in a TO-252-2(DPAK). 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	INPUT	power_in	Unregulated positive DC input supply. Absolute max 35 V (for Vo = 5-18 V variants). A 0.33 uF input decoupling capacitor to GND is recommended per the application circuit.
2	GROUND	power_in	Common ground reference and current return. Electrically connected to the DPAK metal tab, which acts as the primary thermal path to the PCB copper.
3	OUTPUT	power_out	Regulated 5 V positive output, capable of sourcing up to 500 mA with adequate heat sinking. Short-circuit current typically 300 mA. A 0.1 uF output capacitor to GND is recommended for transient response.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	TO-252-2(DPAK)
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

L78M05ABDT-TR
L78M05ABDT-TRT
L78M05ABDT-TRP
L78M05ABDT-TRDP

CAD (KiCad official)

Symbol: L78M05ABDT-TR
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`l78m05abdt-tr.step`	119 KB	You want the bare part, or you mark your own boards.
`l78m05abdt-tr-etched.step`	1.8 MB	You want the part with `L78M05ABDT-TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 484 faces against 83 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 (45 pp, sha256 13a3708896033a32, retrieved 2026-08-17, tier: manufacturer)
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