HT7833-A from UMW, in a SOT-89. 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 for both the input supply and the regulated output. All voltages in the datasheet are referenced to this pin.
2	VIN	power_in	Unregulated supply input. Absolute max 15V (recommended operating max 12V). A small input decoupling capacitor is recommended close to this pin for stability.
3	VOUT	power_out	Regulated 3.3V (±3%) output. Delivers up to 450mA with ~90mV dropout at 40mA. Requires an output capacitor for loop stability.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	SOT-89
Category	PMIC
Pins	3

CAD (KiCad official)

Symbol: HT7833-A
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ht7833-a.step`	57 KB	You want the bare part, or you mark your own boards.
`ht7833-a-etched.step`	1.1 MB	You want the part with `HT7833-A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 300 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: UMW datasheet (12 pp, sha256 0ddd2116b6d87a09, 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