HT7850-A from UMW, 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 reference. All output and input voltages are referenced to this pin.
3	VIN	power_in	Supply voltage input. Accepts up to 12 V typical (15 V absolute maximum). Should be decoupled to GND with a bypass capacitor close to the pin.
2	VOUT	power_out	Regulated 5.0 V output (±3% tolerance, 2.5 V variant: 2.425-2.575 V range shown for 7825; 7850-A regulates to 5.0 V). Sources up to 450 mA. Requires an output capacitor to GND for stability.

Key specifications

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

CAD (KiCad official)

Symbol: HT7850-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
`ht7850-a.step`	57 KB	You want the bare part, or you mark your own boards.
`ht7850-a-etched.step`	1.0 MB	You want the part with `HT7850-A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 290 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