RS7533-1YF3 from Jiangsu RUNIC Tech, in a SOT-23-3. 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 pin. All device voltages are specified with respect to this pin.
2	VOUT	power_out	Regulated 3.3V output pin. Delivers up to 150mA. Recommended output capacitor range is 1µF to 10µF for stability.
3	VIN	power_in	Regulator input supply pin. Accepts up to 36V (absolute max 40V). At least a 1µF supply bypass capacitor is recommended close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

RS7533-1YF3
RS7533-1YF31YE3L
RS7533-1YF31YE3

CAD (KiCad official)

Symbol: RS7533-1YF3
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`rs7533-1yf3.step`	59 KB	You want the bare part, or you mark your own boards.
`rs7533-1yf3-etched.step`	2.0 MB	You want the part with `RS7533-1YF3` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 477 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: Jiangsu RUNIC Tech datasheet (11 pp, sha256 818bd81e05d2139f, 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