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L78L05ABUTR

Public Made by Adom

by adom

STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs l78l05abutr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
l78l05abutr-etched.fit.json l78l05abutr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1d ago
l78l05abutr-etched.glb l78l05abutr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1d ago
l78l05abutr-etched.step l78l05abutr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1d ago
l78l05abutr.glb Publish 0.1.0 · Ray 1mo ago
l78l05abutr.kicad_mod Publish 0.1.0 · Ray 1mo ago
l78l05abutr.kicad_sym Publish 0.1.0 · Ray 1mo ago
l78l05abutr.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect and oval pad as a SQUARE EAGLE smd; this carries the real pad shape across (0 -> 2 rounded pads) and stops dropping geometry drawn on KiCad User.N layers. Attributes, connects, pads and the pin-1 marker are gated against decreasing and are unchanged. · Ray 1mo ago
l78l05abutr.step Publish 0.1.0 · Ray 1mo ago
package.json Publish 0.2.0 · Ray 1mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
page.json Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") · Ray 12d ago
README.md l78l05abutr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 18d ago

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 files: l78l05abutr-etched.step / l78l05abutr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l78l05abutr.step / l78l05abutr.glb are the bare package body.

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