component

78L05S

Public Unreviewed

by Ray

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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78L05S

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23

78L05S from UMW, in a SOT-23. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Output power_out Regulated +5 V output, 100 mA max. Recommended output capacitor 0.1 μF to ground for stability and transient response.
2 GND power_in Common ground reference. On SOT-89 this pin is also electrically tied to the large metal heat-spreader tab on the underside of the package.
3 Input power_in Unregulated DC input, 7 V to 35 V (up to 40 V for the 24 V option, not applicable to 78L05). Recommended input capacitor 0.33 μF to ground close to the pin.

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-23
Category PMIC
Pins 3

Ordering variants

  • 78L05SS
  • 78L05SL
  • 78L05SSOT-89
  • 78L05SZ
  • 78L05STO-92
  • 78L05SSOT-23
  • 78L05SSOP-8

CAD (KiCad official)

  • Symbol: 78L05S
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
78l05s.step 59 KB You want the bare part, or you mark your own boards.
78l05s-etched.step 1.4 MB You want the part with 78L05S already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 323 faces against 69 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 (22 pp, sha256 3eeae843c9f51425, 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