SPX1117M3-L-3-3 from MaxLinear, 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	ADJ/GND	power_in	Ground pin for the fixed-voltage option (this SPX1117M3-L-3-3 is the 3.3V fixed version, so pin 1 is tied to system ground). On the adjustable variant this same pin functions as the ADJ feedback node with a typical adjust-pin current of approximately 50uA.
2	VOUT	power_out	Regulated 3.3V output pin, 3.267V to 3.333V typical (25 degC) and 3.234V to 3.366V over full operating range. Guaranteed 800mA continuous / 1A peak. Requires a >=2.2uF ceramic (or 10uF aluminum) output capacitor for stability; ESR should be <=0.5 ohm. The exposed TAB of the SOT-223 package is internally connected to VOUT.
3	VIN	power_in	Unregulated input supply, absolute maximum 20V. For the 3.3V fixed version, minimum input is VOUT+1.5V (approx 4.8V) for full spec; typical operating range is 4.8V to 10V. Bypass with a 4.7uF input capacitor close to the pin.

Key specifications

Parameter	Value
Manufacturer	MaxLinear
Package	SOT-223-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

SPX1117M3-L-3-3
SPX1117M3-L-3-3/TR
SPX1117T-L-3-3
SPX1117T-L-3-3/TR

CAD (KiCad official)

Symbol: SPX1117M3-L-3-3
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`spx1117m3-l-3-3.step`	64 KB	You want the bare part, or you mark your own boards.
`spx1117m3-l-3-3-etched.step`	2.1 MB	You want the part with `SPX1117M3-L-3-3` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 541 faces against 75 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: MaxLinear datasheet (11 pp, sha256 d1c809a37deea7ec, 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).

Datasheet PDF