H7233-1 from Shanghai Siproin Microelectronics, 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 / Vss reference. Internally tied to the negative rail of the voltage reference and pass-transistor return.
2	VOUT	power_out	Regulated 3.3V output. Requires an output capacitor of 1uF tantalum or 6.8uF ceramic for stability. Delivers >400mA output current when Vin-Vout >= 1V.
3	VIN	power_in	Unregulated input supply, 3.5V to 15V (absolute max 18V). Requires a 1uF input capacitor for stable operation.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

H7233-1MR
H7233-1MG
H7233-1PR
H7233-1PG
H7233-1M5R
H7233-1M5G

CAD (KiCad official)

Symbol: H7233-1
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
`h7233-1.step`	59 KB	You want the bare part, or you mark your own boards.
`h7233-1-etched.step`	1.2 MB	You want the part with `H7233-1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 302 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 2df0180fb7063165, 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