H7333-A from Shanghai Siproin Microelectronics, in a SOT-89-3. 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 / common return for the regulator. Connect to the system single-point ground; the input and output decoupling capacitor (10µF typ.) returns tie here.
2	VIN	power_in	Unregulated supply input. Operating range typically VOUT+1V (dropout ~100mV at 40mA) up to 15V recommended (18V absolute max). Requires a ~10µF input capacitor (C1) referenced to GND. For SOT-89 the center pin is the tab / thermal pad.
3	VOUT	power_out	Regulated 3.3V ±2% output, capable of sourcing up to 250mA (derated at higher VIN: ~150mA at 12V, ~100mA at 15V per Fig. 5). Requires a ~10µF output capacitor (C2) to GND for stability.

Key specifications

Parameter	Value
Manufacturer	Shanghai Siproin Microelectronics
Package	SOT-89-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

H7333-AT
H7333-AP
H7333-AN
H7333-AM

CAD (KiCad official)

Symbol: H7333-A
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`h7333-a.step`	57 KB	You want the bare part, or you mark your own boards.
`h7333-a-etched.step`	1.0 MB	You want the part with `H7333-A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 289 faces against 42 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 (14 pp, sha256 792fed91578d2bec, 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