MC78M05ABDTRKG from onsemi, in a DPAK-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	Input	power_in	Unregulated positive input supply. For the 5.0 V variant, operate with V_I from 7.0 V to 25 V (absolute maximum 35 V). Bypass with a suitable input capacitor when the regulator is located far from the filter capacitor.
2	Ground	power_in	Common ground reference for both input and output. Also connected internally to the exposed heatsink tab (terminal 4) of the DPAK-3 package, which serves as the primary thermal path to the PCB copper.
3	Output	power_out	Regulated +5.0 V output (4.9 V to 5.1 V typical for the AB high-accuracy grade at Tj = 25°C). Delivers up to 500 mA with adequate heatsinking; short-circuit current limit is typically 350 mA and peak output current is 700 mA. Dropout voltage is typically 2.0 V.
4	Tab/Ground	power_in	Exposed heatsink tab on the underside of the DPAK-3 package. Electrically tied internally to pin 2 (Ground). Solder to a copper pour to sink heat; θJC = 5.0 °C/W, θJA = 92 °C/W in the DT suffix package.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	DPAK-3
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

MC78M05ABDTRKG
MC78M05ABDTRKGDTG
MC78M05ABDTRKGTG

CAD (KiCad official)

Symbol: MC78M05ABDTRKG
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: DPAK-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mc78m05abdtrkg.step`	119 KB	You want the bare part, or you mark your own boards.
`mc78m05abdtrkg-etched.step`	2.2 MB	You want the part with `MC78M05ABDTRKG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 580 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: onsemi datasheet (15 pp, sha256 2339bbc0a38dcd3b, 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