78D09L from UMW, 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 DC input supply. For a 9 V output, typical VI = 15 V (recommended VI range 11.5-24 V, absolute max 35 V). A 0.33 µF input bypass capacitor to GND is recommended close to the pin.
2	GND	power_in	Common ground / reference for both input and output. On the TO-252 package this pin is electrically common with the exposed thermal tab, which also serves as the primary heat-sink pad.
3	OUTPUT	power_out	Regulated +9 V output, up to 1 A load current (VO typ 9 V, 8.64-9.36 V at 25 °C). A 0.1 µF output capacitor to GND close to the pin is recommended for stability. Internally protected against short circuit (~800 mA into a shorted load) and thermal overload.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	TO-252
Category	PMIC
Pins	3

Ordering variants

78D09LL

CAD (KiCad official)

Symbol: 78D09L
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
`78d09l.step`	119 KB	You want the bare part, or you mark your own boards.
`78d09l-etched.step`	1.3 MB	You want the part with `78D09L` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 332 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: UMW datasheet (15 pp, sha256 0816f246cc64ec64, 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