component

78L12G-AB3-R

Public Unreviewed

by Ray

UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmic78l12g-ab3-r
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Symbol & Footprint

Schematic Symbol

Open full view ↗

PCB Footprint

Open full view ↗
Contents

README

markdown

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 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