SPX5205M5-L 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, +2.5 V to +16 V recommended (absolute max -20 V to +20 V, reverse-battery protected). Bypass with a 1 uF capacitor close to the pin.
2	GND	power_in	Device ground return. Ground pin current ranges from ~70 uA at IL=100 uA up to ~1.3 mA at IL=150 mA.
3	EN	input	Active-high enable input. VIH >= 2.0 V turns the regulator ON; VIL <= 0.4 V places it in zero-off-mode. Input range 0 V to VIN (abs max -20 V to +20 V). May be tied directly to VIN for always-on operation.
4	BYP/ADJ	bidirectional	On the adjustable version (SPX5205M5-L/TR, top mark H1WW) this pin is ADJ: feedback node tied to the R1/R2 divider from VOUT to set VOUT = 1.235 V x (1 + R1/R2); R2 must be > 10 kohm (22-47 kohm recommended). On fixed-output variants it is BYP: exposes the internal 1.235 V reference for a 10 nF noise-bypass capacitor to GND, dropping output noise to ~40 uVRMS. Larger CBYP slows start-up; may be left open if noise is not critical.
5	VOUT	power_out	Regulated LDO output, 150 mA max, 1% initial accuracy. Requires an output capacitor for stability (1 uF tantalum or 2.2 uF aluminum electrolytic typical). Current limited to ~360-500 mA and thermally protected.

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/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
SPX5205M5-L-5-0/TR

CAD (KiCad official)

Symbol: SPX5205M5-L
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.step`	85 KB	You want the bare part, or you mark your own boards.
`spx5205m5-l-etched.step`	2.0 MB	You want the part with `SPX5205M5-L` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 496 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