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78L15G-AB3-R

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UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. 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 78l15g-ab3-r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers 78l15g-ab3-r: footprint pads join the pin-hover bus with the symbol (3 pads) · Ray
78l15g-ab3-r-etched.fit.json 78l15g-ab3-r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
78l15g-ab3-r-etched.glb 78l15g-ab3-r: one-pass backfill (re-etched) · Ray
78l15g-ab3-r-etched.step 78l15g-ab3-r: one-pass backfill (re-etched) · Ray
78l15g-ab3-r-hero.glb 78l15g-ab3-r: one-pass backfill (re-etched) · Ray
78l15g-ab3-r-hero.overlay.json 78l15g-ab3-r: one-pass backfill (re-etched) · Ray
78l15g-ab3-r.glb Publish 0.1.0 · Ray
78l15g-ab3-r.kicad_mod 78l15g-ab3-r: one-pass backfill (courtyard 25.5 -> 22.62 mm2 (margin 0.25, default), hero rebuilt in-pass (inputs chang… · Ray
78l15g-ab3-r.kicad_sym Publish 0.1.0 · Ray
78l15g-ab3-r.lbr 78l15g-ab3-r: one-pass backfill (courtyard 25.5 -> 22.62 mm2 (margin 0.25, default), hero rebuilt in-pass (inputs chang… · Ray
78l15g-ab3-r.step Publish 0.1.0 · Ray
package.json Publish 0.2.3 · 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 0.2.3 · Ray
README.md 78l15g-ab3-r: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

78L15G-AB3-R

UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89

78L15G-AB3-R from UTC Unisonic Tech, in a SOT-89. 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 OUT power_out Regulated positive output. For the 78L15 variant this provides a fixed +15V (14.40V-15.60V at TJ=25°C) at up to 100mA. A 0.1μF ceramic bypass capacitor to GND is recommended close to this pin for transient response.
2 GND power_in Common ground reference for both the input and the regulated output. Ground return also carries the regulator's quiescent current (typ. 2.2mA for 78L15).
3 IN power_in Unregulated positive input supply. For the 78L15, VIN must be at least ~17.5V (dropout ~1.7V above VOUT) and must not exceed the 35V absolute maximum. A 0.33μF bypass capacitor to GND is recommended close to this pin.

Key specifications

Parameter Value
Manufacturer UTC Unisonic Tech
Package SOT-89
Category PMIC
Pins 3

Ordering variants

  • 78L15G-AB3-R
  • 78L15G-AB3-RG-AB3-C-R
  • 78L15G-AB3-RG-AF5-R
  • 78L15G-AB3-RG-S08-R
  • 78L15G-AB3-RL-T92-B
  • 78L15G-AB3-RG-T92-B
  • 78L15G-AB3-RL-T92-K
  • 78L15G-AB3-RG-T92-K
  • 78L15G-AB3-RL-T9N-B
  • 78L15G-AB3-RG-T9N-B
  • 78L15G-AB3-RL-T9N-K
  • 78L15G-AB3-RG-T9N-K

CAD (KiCad official)

  • Symbol: 78L15G-AB3-R
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: 78l15g-ab3-r-etched.step / 78l15g-ab3-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 78l15g-ab3-r.step / 78l15g-ab3-r.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
78l15g-ab3-r.step 57 KB You want the bare part, or you mark your own boards.
78l15g-ab3-r-etched.step 1.6 MB You want the part with 78L15G-AB3-R already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 419 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: UTC Unisonic Tech datasheet (8 pp, sha256 019cf0ff8e450efc, 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