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Generated by kicad-footprint-generator · KiCad file format 20260206

Name	Last commit message	Last updated
docs	78m05: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray	19d ago
viewers	pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray	2mo ago
78m05-etched.fit.json	78m05: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray	1mo ago
78m05-etched.glb	78m05: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray	19d ago
78m05-etched.step	78m05: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray	19d ago
78m05.glb	Publish 0.1.0 · Ray	2mo ago
78m05.kicad_mod	78m05: factory component page (tier=lcsc) · Ray	2mo ago
78m05.kicad_sym	78m05: factory component page (tier=lcsc) · Ray	2mo ago
78m05.lbr	rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray	2mo ago
78m05.step	78m05: factory component page (tier=lcsc) · Ray	2mo ago
package.json	Publish 0.2.0 · Ray	2mo ago
pads.json	pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray	2mo ago
page.json	78m05: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray	19d ago
README.md	78m05: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray	1mo ago

78M05

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

78M05 from UMW, in a TO-252. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	INPUT	power_in	Unregulated DC input supply. Absolute maximum 35V (for Vo=5..18V variants) / 40V (for Vo=24V). For 78M05, typical Vi=10V; must exceed Vo by the dropout voltage (Vd ≈ 2V at Io=500mA). Bypass to GND with a ~0.33µF ceramic close to the pin.
2	GND	power_in	Common ground reference for both input and output. On TO-252 and SOT-223 packages this pin is electrically tied to the exposed tab/heat-slug used for thermal dissipation.
3	OUTPUT	power_out	Regulated +5V output (4.8V-5.2V at 25°C; 4.75V-5.25V over full load). Delivers up to 1A continuous (Isc≈800mA, Ipk≈1300mA typical). Decouple to GND with ~0.1µF ceramic close to the pin for stability.

Key specifications

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

CAD (KiCad official)

Symbol: 78M05
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252 (KiCad packages3D, STEP)
3D model files: 78m05-etched.step / 78m05-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 78m05.step / 78m05.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`78m05.step`	119 KB	You want the bare part, or you mark your own boards.
`78m05-etched.step`	1.2 MB	You want the part with `78M05` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 317 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 (16 pp, sha256 162df1416fa16ead, 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