component

L78L05ABZ

Public Made by Adom

by adom

STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-92-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

Also listed as L78L05ABZ-TR

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L78L05ABZ

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92-3

L78L05ABZ from STMicroelectronics, in a TO-92-3. 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 with adequate heat-sinking. A 0.1 µF output capacitor is recommended for transient response and stability.
2 GND power_in Common ground return for input and output. Quiescent current (~6 mA max) flows out this pin.
3 VIN power_in Unregulated DC input, typically 7 V to 20 V for a 5 V output (absolute max 30 V for VO = 3.3-9 V variants). A 0.33 µF input capacitor is recommended if the regulator is located far from the supply filter.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package TO-92-3
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • L78L05ABZZ
  • L78L05ABZ
  • L78L05ABZACZ
  • L78L05ABZD
  • L78L05ABZABD
  • L78L05ABZACD
  • L78L05ABZ13TR
  • L78L05ABZABD13TR
  • L78L05ABZACD13TR

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 10
Output voltage over line and load VO 4.75 5.25 V IO = 1 to 40 mA, VI = 7 to 20 V 10
Output voltage over load at 70 mA VO 4.75 5.25 V IO = 1 to 70 mA, VI = 10 V 10
Line regulation ∆VO 150 mV VI = 7.3 to 20 V, TJ = 25 °C 10
Line regulation ∆VO 100 mV VI = 8 to 20 V, TJ = 25 °C 10
Load regulation ∆VO 60 mV IO = 1 to 100 mA, TJ = 25 °C 10
Load regulation ∆VO 30 mV IO = 1 to 40 mA, TJ = 25 °C 10
Quiescent current Id 6 mA TJ = 25 °C 10
Quiescent current Id 5.5 mA TJ = 125 °C 10
Quiescent current change ∆Id 0.1 mA IO = 1 to 40 mA 10
Quiescent current change ∆Id 1.5 mA VI = 8 to 20 V 10
Output noise voltage eN 40 µV B = 10 Hz to 100 kHz, TJ = 25 °C 10
Supply voltage rejection SVR 41 49 dB VI = 8 to 18 V, f = 120 Hz, IO = 40 mA, TJ = 25 °C 10
Dropout voltage Vd 2 V 10
DC input voltage (VO = 3.3 to 9 V, applies to 5 V output) VI 30 V VO = 3.3 to 9 V 4
Output current IO 100 mA 4
Storage temperature range TSTG -65 150 °C 4
Operating junction temperature range (L78LxxAB) TOP -40 125 °C for L78LxxAB 4
Thermal resistance junction-ambient (TO-92) RthJA 200 °C/W 4

CAD (KiCad official)

  • Symbol: L78L05ABZ
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92-3 (KiCad packages3D, STEP)
  • 3D model files: l78l05abz-etched.step / l78l05abz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l78l05abz.step / l78l05abz.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
l78l05abz.step 27 KB You want the bare part, or you mark your own boards.
l78l05abz-etched.step 1.3 MB You want the part with L78L05ABZ already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 341 faces against 19 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 (40 pp, sha256 8b73c521b7f1b36e, 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