L78M15ABDT-TR from STMicroelectronics, in a 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 DC input voltage (V_I). Absolute maximum 35 V for 5-18 V output variants. Should be bypassed to GND with a 0.33 µF ceramic if the device is more than a few centimetres from the reservoir cap.
2	GND	power_in	Common ground reference for input and output. Electrically tied to the exposed thermal tab on DPAK, which also serves as the primary heat-transfer path to the PCB copper pour.
3	OUTPUT	power_out	Regulated +15 V output (typ), guaranteed 14.55-15.45 V (2 %, AB grade). Delivers up to 500 mA with adequate heat-sinking; internally current-limited (~230 mA short-circuit, typ). Bypass to GND with 0.1 µF ceramic.
TAB	GND	power_in	Exposed metal tab on the DPAK backside - same net as pin 2 (GND). Soldered to a copper pour that dissipates junction heat (R_thJC ≈ 8 °C/W, R_thJA ≈ 100 °C/W on standard footprint).

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	DPAK
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

L78M15ABDT-TR
L78M15ABDT-TRCV
L78M15ABDT-TRACV
L78M15ABDT-TRABV
L78M15ABDT-TRCP
L78M15ABDT-TRACP
L78M15ABDT-TRABP
L78M15ABDT-TR-1

CAD (KiCad official)

Symbol: L78M15ABDT-TR
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: DPAK (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`l78m15abdt-tr.step`	119 KB	You want the bare part, or you mark your own boards.
`l78m15abdt-tr-etched.step`	1.7 MB	You want the part with `L78M15ABDT-TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 469 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 aab13a77a9bc7601, 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