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L78L05ACUTR

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 l78l05acutr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
l78l05acutr-etched.fit.json l78l05acutr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
l78l05acutr-etched.glb l78l05acutr: one-pass backfill (re-etched) · Ray
l78l05acutr-etched.step l78l05acutr: one-pass backfill (re-etched) · Ray
l78l05acutr-hero.glb Publish 0.2.2 · Ray
l78l05acutr-hero.overlay.json Publish 0.2.2 · Ray
l78l05acutr.glb Publish 0.1.0 · Ray
l78l05acutr.kicad_mod Publish 0.1.0 · Ray
l78l05acutr.kicad_sym Publish 0.1.0 · Ray
l78l05acutr.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
l78l05acutr.step Publish 0.1.0 · Ray
package.json Publish 0.2.2 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json Publish 0.2.2 · Ray
README.md l78l05acutr: specified limits as data (metadata.characteristics, 18 rows from the datasheet) · Ray

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output voltage (TJ = 25 °C) VO 4.8 5 5.2 V TJ = 25 °C 16
Output voltage VO 4.75 5.25 V IO = 1 to 40 mA, VI = 7 to 20 V 16
Line regulation ΔVO 150 mV VI = 7 to 20 V, TJ = 25 °C 16
Line regulation ΔVO 100 mV VI = 8 to 20 V, TJ = 25 °C 16
Load regulation ΔVO 60 mV IO = 1 to 100 mA, TJ = 25 °C 16
Load regulation ΔVO 30 mV IO = 1 to 40 mA, TJ = 25 °C 16
Quiescent current Id 6 mA TJ = 25 °C 16
Quiescent current Id 5.5 mA TJ = 125 °C 16
Quiescent current change ΔId 0.1 mA IO = 1 to 40 mA 16
Quiescent current change ΔId 1.5 mA VI = 8 to 20 V 16
Output noise voltage eN 40 µV B = 10 Hz to 100 kHz, TJ = 25 °C 16
Supply voltage rejection SVR 41 49 dB VI = 8 to 18 V, f = 120 Hz, IO = 40 mA, TJ = 25 °C 16
Dropout voltage Vd 1.7 V 16
DC input voltage (VO = 3.3 to 9 V; applies to 5 V output) VI 30 V VO = 3.3 to 9 V 5
Output current IO 100 mA 5
Storage temperature range TSTG -65 150 °C 5
Operating junction temperature range (L78LxxAC / L78LxxC) TOP 0 125 °C for L78LxxAC / L78LxxC 5
Thermal resistance junction-ambient (SOT-89) RthJA 55 °C/W Considering 6 cm² of copper board heat-sink (note 1) 5

CAD (KiCad official)

  • Symbol: L78L05ACUTR
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: l78l05acutr-etched.step / l78l05acutr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l78l05acutr.step / l78l05acutr.glb are the bare package body.

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