component

78L12G-AB3-R

Public Made by Adom

by adom

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

componentpmic78l12g-ab3-r
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs 78l12g-ab3-r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
78l12g-ab3-r-etched.fit.json 78l12g-ab3-r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
78l12g-ab3-r-etched.glb 78l12g-ab3-r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
78l12g-ab3-r-etched.step 78l12g-ab3-r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
78l12g-ab3-r.glb Publish 0.1.0 · Ray 2mo ago
78l12g-ab3-r.kicad_mod Publish 0.1.0 · Ray 2mo ago
78l12g-ab3-r.kicad_sym Publish 0.1.0 · Ray 2mo ago
78l12g-ab3-r.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 2mo ago
78l12g-ab3-r.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.0 · Ray 2mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
page.json 78l12g-ab3-r: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 28d ago
README.md 78l12g-ab3-r: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

78L12G-AB3-R

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

78L12G-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 +12V output. Typical VOUT=12.0V (11.52-12.48V at TJ=25°C); supplies up to 100mA. Bypass with 0.1µF ceramic close to the pin for stability and transient response.
2 GND power_in Ground / common return. On SOT-89 this is the large tab pin and provides the primary thermal path to the PCB copper.
3 IN power_in Unregulated DC input. For the 12V variant: 14.5V ≤ VIN ≤ 27V for regulation, 35V absolute maximum. Bypass with 0.33µF close to the pin to ensure stability.

Key specifications

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

Ordering variants

  • 78L12G-AB3-R
  • 78L12G-AB3-R78L12G-AB3-C-R
  • 78L12G-AB3-R78L12G-AF5-R
  • 78L12G-AB3-R78L12G-S08-R
  • 78L12G-AB3-R78L12G-T92-B
  • 78L12G-AB3-R78L12G-T92-K
  • 78L12G-AB3-R78L12L-T92-B
  • 78L12G-AB3-R78L12L-T92-K
  • 78L12G-AB3-R78L12G-T9N-B
  • 78L12G-AB3-R78L12G-T9N-K
  • 78L12G-AB3-R78L12L-T9N-B
  • 78L12G-AB3-R78L12L-T9N-K

CAD (KiCad official)

  • Symbol: 78L12G-AB3-R
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: 78l12g-ab3-r-etched.step / 78l12g-ab3-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 78l12g-ab3-r.step / 78l12g-ab3-r.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
78l12g-ab3-r.step 57 KB You want the bare part, or you mark your own boards.
78l12g-ab3-r-etched.step 1.6 MB You want the part with 78L12G-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: 417 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