SPX1117M3-L-5-0 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	GND	power_in	Ground reference for the regulator. On fixed-output variants (including the -5-0 5.0V option) this pin is the device ground; on adjustable variants the same pin functions as the ADJ feedback input (I_ADJ ≈ 50µA typ). For the SPX1117M3-L-5-0 tie directly to the system ground plane.
2	VOUT	power_out	Regulated 5.0V output (4.950V-5.050V typ at IOUT=5mA, VIN=6.5V). Requires a minimum 2.2µF ceramic (or 10µF tantalum/aluminum) output capacitor with ESR ≤0.5Ω for stability. Supplies up to 800mA guaranteed (1A peak), current-limited to 1.0-2.0A.
3	VIN	power_in	Unregulated input supply. For the 5.0V fixed option requires 6.4V ≤ VIN ≤ 12V over full load (absolute max 20V). Bypass with CIN=10µF recommended.
4	TAB	power_out	Heatsink tab, internally connected to VOUT. Solder to a copper pour tied to the VOUT net to conduct heat away from the die (θJA ≈ 46°C/W with adequate copper on FR-4). Do NOT connect to ground or any other net.

Key specifications

Parameter	Value
Manufacturer	MaxLinear
Package	SOT-223-3
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

SPX1117M3-L-5-0
SPX1117M3-L-5-0/TR
SPX1117T-L
SPX1117T-L/TR
SPX1117T-L-3-3/TR

The extractor listed these alongside SPX1117M3-L-5-0, but they are different parts with different electrical characteristics. Do not order them as substitutes.

SPX1117T-L-3-3

CAD (KiCad official)

Symbol: SPX1117M3-L-5-0
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-5-0.step`	64 KB	You want the bare part, or you mark your own boards.
`spx1117m3-l-5-0-etched.step`	2.0 MB	You want the part with `SPX1117M3-L-5-0` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 521 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

SPX1117M3-L-5-0

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README