SPX5205M5-L-3-3 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	Input supply voltage pin. Recommended operating range +2.5V to +16V (absolute max -20V to +20V, reverse-battery protected). Bypass to GND with a 1µF capacitor.
2	GND	power_in	Device ground return. Ground pin current (IGND) is typically 70µA at 100µA load and 750µA at 100mA load.
3	EN	input	Enable input. Drive >2.0V (VIH) to enable the regulator; drive <0.4V (VIL) to disable (zero off-mode current). Enable input current is typically 0.01µA when low and 3µA when high (20µA max). May be tied directly to VIN. Absolute max -20V to +20V.
4	BYP	passive	Bypass pin exposing the internal reference. Connecting a 10nF (or larger, e.g. 1µF) capacitor from BYP to GND significantly reduces output noise (down to 40µVRMS with CBYP=1µF, CL=10µF). May be left unconnected if noise is not a concern; larger CBYP slows start-up.
5	VOUT	power_out	Regulated 3.3V output (fixed, ±1% initial accuracy). Sources up to 150mA with 210mV typical dropout at full load. Requires an output capacitor for stability (typically 1µF tantalum or 2.2µF aluminum electrolytic).

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-3-3/TR

CAD (KiCad official)

Symbol: SPX5205M5-L-3-3
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-3-3.step`	85 KB	You want the bare part, or you mark your own boards.
`spx5205m5-l-3-3-etched.step`	2.5 MB	You want the part with `SPX5205M5-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: 611 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