LM78M05CDTX from Texas Instruments, in a TO-252. 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 supply input. For the 5-V variant, V_IN must be at least V_OUT + 1.8 V (≈7.2 V min) and no greater than 35 V absolute maximum. A 0.33 µF input bypass capacitor (C_IN) is recommended near the pin.
2	GND	power_in	Ground / common return for the regulator. On the TO-252 (NDP) package the exposed tab is electrically connected to GND and provides the primary thermal path (R_θJA ≈ 38 °C/W, R_θJC(top) ≈ 48.4 °C/W).
3	OUTPUT	power_out	Regulated +5 V output, capable of >0.5 A. Output voltage is 4.8-5.2 V at I_L = 500 mA (T_J = 25 °C). A 0.1 µF output capacitor (C_O) is recommended for transient/stability performance.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TO-252
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

LM78M05CDTX
LM78M05CDTXCT
LM78M05CDTXH

CAD (KiCad official)

Symbol: LM78M05CDTX
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm78m05cdtx.step`	119 KB	You want the bare part, or you mark your own boards.
`lm78m05cdtx-etched.step`	1.7 MB	You want the part with `LM78M05CDTX` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 447 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: Texas Instruments datasheet (26 pp, sha256 bf4bbc5ec1195c41, 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