component
LM2940G-12V-AA3-R
Public Made by Adomby adom
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM2940G-12V-AA3-R
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-3
LM2940G-12V-AA3-R from UTC Unisonic Tech, in a SOT-223-3. 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 | VIN | power_in | Unregulated input supply pin. Operating input range 13.6V to 26V for the 12V variant; absolute maximum 26V. Bypass with capacitor recommended for stability. |
| 2 | GND | power_in | Ground reference pin. Also serves as the thermal tab connection on SOT-223 (tab is electrically GND). |
| 3 | VOUT | power_out | Regulated 12V output pin (11.64V min, 12.00V typ, 12.36V max). Supplies up to 1A load current. Requires a 22uF output capacitor for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOT-223-3 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
Same part, different packaging or reel option.
LM2940G-12V-AA3-RLM2940G-12V-AA3-RTA3-TLM2940G-12V-AA3-RTF3-TLM2940G-12V-AA3-RTN3-RLM2940G-12V-AA3-RTQ2-RLM2940G-12V-AA3-RTQ2-TLM2940G-12V-AA3-RTQ3-RLM2940G-12V-AA3-RTQ3-T
CAD (KiCad official)
- Symbol:
LM2940G-12V-AA3-R - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223-3 (KiCad packages3D, STEP)
- 3D model files:
lm2940g-12v-aa3-r-etched.step/lm2940g-12v-aa3-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2940g-12v-aa3-r.step/lm2940g-12v-aa3-r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (12 pp, sha256
2caeccb20b3d374c, 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).