component

78M05

Public Unreviewed

by Ray

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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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 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