component

78L05

Public Unreviewed

by Ray

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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78L05

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

78L05 from UMW, in a SOT-89-3. 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 DC output (nominal 5.0 V, 4.8-5.2 V at TJ=25 °C). Supplies up to 100 mA to the load. A 0.1 µF ceramic bypass capacitor to GND is recommended for stability and transient response.
2 GND power_in Common ground reference for both input and output. Also carries the quiescent current (typ. 2 mA) of the regulator.
3 Input power_in Unregulated DC input supply. Recommended VI ≥ 7.5 V (for full-spec 5 V regulation); absolute maximum VI = 35 V. A 0.33 µF ceramic bypass capacitor to GND is recommended close to the pin, especially if the device is located far from the bulk filter capacitor.

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-89-3
Category PMIC
Pins 3

CAD (KiCad official)

  • Symbol: 78L05
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
78l05.step 57 KB You want the bare part, or you mark your own boards.
78l05-etched.step 969 KB You want the part with 78L05 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 258 faces against 42 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