# SPX2954M3-3.3

**MaxLinear** · Linear Voltage Regulators (LDO) · SOT-223-4

SPX2954M3-3.3 from MaxLinear, in a SOT-223-4. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Unregulated input supply, rated -0.3V to +30V absolute maximum. |
| 2 | GND | power_in | Ground reference for the regulator, internally connected to the tab. |
| 3 | VOUT | power_out | Regulated 3.3V output rated for 250mA, which needs at least 1µF to ground for stability. |
| 4 | TAB | power_in | Package tab, internally connected to GND on the SOT-223. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MaxLinear |
| Package | SOT-223-4 |
| Category | Power Management ICs |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `SPX2954M3-3.3`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `spx2954m3-3-3-etched.step` / `spx2954m3-3-3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `spx2954m3-3-3.step` / `spx2954m3-3-3.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [MaxLinear datasheet](docs/spx2954m3-3-3-datasheet.pdf) (17 pp, sha256 `a5d8e04610830ac9`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/spx2954m3-3-3-datasheet.pdf)