SPX5205M5-L-5-0 from MaxLinear, in a SOT-23-5. 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. Recommended operating range +2.5V to +16V (absolute max -20V to +20V). A 1μF input capacitor is recommended for stability.
2	GND	power_in	Device ground return. Also carries the ground pin (quiescent) current, typically 750μA at 100mA load.
3	EN	input	Active-high enable input. Drive ≥2.0V to enable the regulator; drive ≤0.4V to disable (zero off-mode current). May be tied directly to VIN. Absolute max -20V to +20V.
4	BYP	passive	Reference bypass pin. Connect an optional 10nF capacitor from BYP to GND to reduce output noise to ~40μVRMS. The internal reference is available here. May be left unconnected for fast turn-on; larger CBYP slows start-up. On the adjustable version this pin becomes ADJ; on this 5.0V fixed variant it is BYP.
5	VOUT	power_out	Regulated 5.0V output, up to 150mA. Requires an output capacitor for stability; a 1μF (typ) to 2.2μF ceramic/tantalum is typical. Current limit ~500mA typ; internally thermally limited.

Key specifications

Parameter	Value
Manufacturer	MaxLinear
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

SPX5205M5-L-5-0/TR
SPX5205M5-L/TR
SPX5205M5-L-1-2/TR
SPX5205M5-L-1-8/TR
SPX5205M5-L-2-5/TR
SPX5205M5-L-3-0/TR
SPX5205M5-L-3-3/TR

CAD (KiCad official)

Symbol: SPX5205M5-L-5-0
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`spx5205m5-l-5-0.step`	85 KB	You want the bare part, or you mark your own boards.
`spx5205m5-l-5-0-etched.step`	2.4 MB	You want the part with `SPX5205M5-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: 589 faces against 102 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 (8 pp, sha256 421c6d60c0a5736f, 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