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L78L05ACUTR

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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Symbol & Footprint

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Contents

README

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L78L05ACUTR

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

L78L05ACUTR 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. Bypass to GND with a 0.1 uF (or larger) ceramic capacitor per ST's recommended application.
2 GND power_in Ground / common reference for both input and output. On the SOT-89 this pin also functions as the die-attach tab used for heat-sinking to the PCB copper.
3 VIN power_in Unregulated DC input supply. Absolute maximum 30 V for the 5 V variant; typical operating range roughly 7-20 V. Bypass to GND with a 0.33 uF (or larger) capacitor located close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • L78L05ACUTR
  • L78L05ABUTR
  • L78L05ACZ
  • L78L05ACZ-AP
  • L78L05ACZ-TR
  • L78L05ABZ
  • L78L05ABZ-AP
  • L78L05ABZ-TR
  • L78L05CZ
  • L78L05ABD13TR
  • L78L05ACD13TR
  • L78L05CD13TR

CAD (KiCad official)

  • Symbol: L78L05ACUTR
  • 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
l78l05acutr.step 57 KB You want the bare part, or you mark your own boards.
l78l05acutr-etched.step 1.5 MB You want the part with L78L05ACUTR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 396 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 (47 pp, sha256 08da79fddb104256, 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