component

L78L05ABUTR

Public Unreviewed

by Ray

STMicroelectronics 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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L78L05ABUTR

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

L78L05ABUTR from STMicroelectronics, in a SOT-89-3. 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 VOUT power_out Regulated +5 V output. Delivers up to 100 mA of load current with ±4% tolerance (AB grade). A 0.1 µF ceramic capacitor to GND is recommended for stability and transient response.
2 GND power_in Ground / common return for input and output. Carries the small quiescent current (typ. a few mA) plus any output return current.
3 VIN power_in Unregulated DC input. Absolute maximum 30 V for the 5 V variant; must be at least VOUT + 1.7 V (typ. dropout) for regulation. A 0.33 µF ceramic input capacitor to GND is recommended when the regulator is far from the raw supply filter.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • L78L05ABUTR
  • L78L05ABUTRZ
  • L78L05ABUTRAZ
  • L78L05ABUTRCZ
  • L78L05ABUTRD
  • L78L05ABUTRD13TR

CAD (KiCad official)

  • Symbol: L78L05ABUTR
  • 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
l78l05abutr.step 57 KB You want the bare part, or you mark your own boards.
l78l05abutr-etched.step 1.5 MB You want the part with L78L05ABUTR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 403 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: STMicroelectronics datasheet (46 pp, sha256 aebc91bfc9b4bb67, retrieved 2026-08-17, tier: manufacturer)
  • 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