SSP7603P50MR from Shanghai Siproin Microelectronics, 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	Device ground / Vss return. Common reference for both the input and output rails.
2	VOUT	power_out	Regulated 5.0 V positive output. Rated for up to 500 mA (Vin-Vout=1 V). Requires an output capacitor (typ. 1 uF tantalum or 6.8 uF ceramic) close to the pin for stability.
3	VIN	power_in	Unregulated positive input supply. Operating range 3.5 V to 15 V (absolute max 18 V). Requires a 1 uF input decoupling capacitor to ground.

Key specifications

Parameter	Value
Manufacturer	Shanghai Siproin Microelectronics
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

SSP7603P50MRPR
SSP7603P50MRPG
SSP7603P50MR
SSP7603P50MRMG
SSP7603P50MRM5R
SSP7603P50MRM5G

CAD (KiCad official)

Symbol: SSP7603P50MR
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
`ssp7603p50mr.step`	59 KB	You want the bare part, or you mark your own boards.
`ssp7603p50mr-etched.step`	2.5 MB	You want the part with `SSP7603P50MR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 593 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: Shanghai Siproin Microelectronics datasheet (9 pp, sha256 3b68c21dd6651bc3, 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