LP3986-33B3F from LOWPOWER, in a SOT-23. 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. Connect to system ground plane.
2	OUT	power_out	Regulated output pin. Provides 3.3V (typ, LP3986-33 variant) at up to 300mA. Requires a 2.2µF (or 1µF X7R) low-ESR ceramic capacitor to GND for stability.
3	VIN	power_in	Power supply input. Operating range 2.5V to 6V (absolute maximum 7V). Requires a 2.2µF ceramic input capacitor to GND close to the pin.

Key specifications

Parameter	Value
Manufacturer	LOWPOWER
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

LP3986-33B3F
LP3986-33B3F33X3F

CAD (KiCad official)

Symbol: LP3986-33B3F
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lp3986-33b3f.step`	59 KB	You want the bare part, or you mark your own boards.
`lp3986-33b3f-etched.step`	2.7 MB	You want the part with `LP3986-33B3F` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 614 faces against 69 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: LOWPOWER datasheet (9 pp, sha256 0ed045971cf1375c, retrieved 2026-08-17, tier: lcsc)
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