78L05G-AB3-R
Public Unreviewedby Ray
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdown78L05G-AB3-R
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
78L05G-AB3-R from UTC Unisonic Tech, 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 | OUT | power_out | Regulated +5V output. Delivers up to 100mA with typical dropout of 1.7V. A 0.1uF ceramic bypass capacitor to GND is recommended close to the pin for stability and transient response. |
| 2 | GND | power_in | Common ground reference for both input and output. Also serves as the thermal path to the PCB copper pattern for SOT-89 heat dissipation (PD = 350mW). |
| 3 | IN | power_in | Unregulated DC input. Recommended range 7V-20V for the 5V variant (absolute maximum 30V for 5-9V output devices). A 0.33uF bypass capacitor to GND close to the pin is recommended when the regulator is far from the input filter. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOT-89-3 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
78L05G-AB3-R78L05G-AB3-R78L05G-AB3-C-R78L05G-AB3-R78L05G-AF5-R78L05G-AB3-R78L05G-S08-R78L05G-AB3-R78L05G-T92-B78L05G-AB3-R78L05G-T92-K78L05G-AB3-R78L05L-T92-B78L05G-AB3-R78L05L-T92-K78L05G-AB3-R78L05G-T9N-B78L05G-AB3-R78L05G-T9N-K78L05G-AB3-R78L05L-T9N-B78L05G-AB3-R78L05L-T9N-K
CAD (KiCad official)
- Symbol:
78L05G-AB3-R - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
78l05g-ab3-r.step |
57 KB | You want the bare part, or you mark your own boards. |
78l05g-ab3-r-etched.step |
1.7 MB | You want the part with 78L05G-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: 449 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).