LD1117AG-50-AB3-A-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
markdownLD1117AG-50-AB3-A-R
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
LD1117AG-50-AB3-A-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 | GND | power_in | Ground reference for the regulator. On this fixed 5.0V (voltage code 50) variant the GND/ADJ pin is tied to system ground; the internal reference sets VOUT = 5.0V above this node. |
| 2 | VOUT | power_out | Regulated 5.0V output, capable of sourcing up to 1 A (LD1117A variant). Requires an output capacitor (MLCC supported) for stability; typical output tolerance is ±2%. |
| 3 | VIN | power_in | Unregulated positive input supply. Recommended operating VIN up to 15V (absolute max 18V). For a 5.0V output the dropout voltage is typically 1.2V at 1A, so VIN must exceed ~6.2V under full load. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOT-89 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
Same part, different packaging or reel option.
LD1117AG-50-AB3-A-RLD1117AG-50-AB3-A-RAA3LD1117AG-50-AB3-A-RTA3LD1117AG-50-AB3-A-RTF3LD1117AG-50-AB3-A-RTN3LD1117AG-50-AB3-A-RTNDLD1117AG-50-AB3-A-RT2QLD1117AG-50-AB3-A-RTQ2LD1117AG-50-AB3-A-RTQ3LD1117AG-50-AB3-A-RS08
CAD (KiCad official)
- Symbol:
LD1117AG-50-AB3-A-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 |
|---|---|---|
ld1117ag-50-ab3-a-r.step |
57 KB | You want the bare part, or you mark your own boards. |
ld1117ag-50-ab3-a-r-etched.step |
1.9 MB | You want the part with LD1117AG-50-AB3-A-R already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 514 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 (15 pp, sha256
f7f26a117cb07dc2, 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).