78L15G-AB3-R
Public Unreviewedby Ray
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdown78L15G-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-R78L15G-AB3-RG-AB3-C-R78L15G-AB3-RG-AF5-R78L15G-AB3-RG-S08-R78L15G-AB3-RL-T92-B78L15G-AB3-RG-T92-B78L15G-AB3-RL-T92-K78L15G-AB3-RG-T92-K78L15G-AB3-RL-T9N-B78L15G-AB3-RG-T9N-B78L15G-AB3-RL-T9N-K78L15G-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 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).