RT9058-33GV from Richtek Tech, 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	VCC	power_in	Supply voltage input. Operating range 3.5V to 36V (absolute max 40V). Bypass to GND with a 1 uF or larger capacitor placed close to the pin.
2	VOUT	power_out	Regulated output of the LDO. Fixed 3.3V, +/-2% accuracy, up to 100mA. Requires an output capacitor with effective capacitance >= 1 uF and ESR >= 1 mOhm for stability.
3	GND	power_in	Device ground reference. Return path for input bypass and output capacitors.

Key specifications

Parameter	Value
Manufacturer	Richtek Tech
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

RT9058-33GV
RT9058-33GVL
RT9058-33GX

CAD (KiCad official)

Symbol: RT9058-33GV
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
`rt9058-33gv.step`	59 KB	You want the bare part, or you mark your own boards.
`rt9058-33gv-etched.step`	2.3 MB	You want the part with `RT9058-33GV` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 543 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: Richtek Tech datasheet (9 pp, sha256 354cc97a6b06f099, 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