HX7133 from HX hengjiaxing, in a SOT-23. 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	Chip ground reference. Common return for VIN and VOUT.
2	VOUT	power_out	Regulated 3.3V output (±3%, min 3.201V, typ 3.3V, max 3.399V). Typical output current 100mA. Requires a 10µF ceramic output capacitor to ground for stability.
3	VIN	power_in	Unregulated input supply. Operating range 4.5V (VOUT+dropout) up to 18V max (absolute max 20V). Requires a 10µF ceramic bypass capacitor to ground.

Key specifications

Parameter	Value
Manufacturer	HX hengjiaxing
Package	SOT-23
Category	PMIC
Pins	3

CAD (KiCad official)

Symbol: HX7133
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`hx7133.step`	59 KB	You want the bare part, or you mark your own boards.
`hx7133-etched.step`	1.1 MB	You want the part with `HX7133` 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 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: HX hengjiaxing datasheet (9 pp, sha256 dea1359de240a881, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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