H7533-1 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	Device ground / common return for both input and output. Reference for the internal bandgap and feedback network.
2	VIN	power_in	Unregulated supply input. Absolute max 18V; recommended operating range up to 15V (H7533-1 line-regulation window 4.5V ≤ VIN ≤ 16V). Bypass close to the pin with a small ceramic capacitor.
3	VOUT	power_out	Regulated 3.3V output (3.234V - 3.366V, ±2%). Sources up to 150mA typical. Requires an output capacitor for stability; low-ESR ceramic recommended.

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.

H7533-1PR
H7533-1PG
H7533-1TR
H7533-1TG
H7533-1NR
H7533-1NG

CAD (KiCad official)

Symbol: H7533-1
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
`h7533-1.step`	57 KB	You want the bare part, or you mark your own boards.
`h7533-1-etched.step`	994 KB	You want the part with `H7533-1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 275 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 (12 pp, sha256 68d89a2084487dc3, 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