HT7550 30V from JSMSEMI HT7550 30V, 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	Chip ground reference. 0V return for both input and output current.
2	VIN	power_in	Unregulated input supply pin. Accepts up to 30V max (VIN typically 7V for HT7550-1 nominal operation). A 10µF bypass capacitor to GND is recommended.
3	VOUT	power_out	Regulated 5.0V ±3% output. Delivers up to ~100mA typical (60mA min). Requires a 10µF output capacitor to GND for stability.

Key specifications

Parameter	Value
Manufacturer	JSMSEMI HT7550 30V
Package	SOT-89
Category	PMIC
Pins	3

CAD (KiCad official)

Symbol: HT7550 30V
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
`ht7550-30v.step`	57 KB	You want the bare part, or you mark your own boards.
`ht7550-30v-etched.step`	1.2 MB	You want the part with `HT7550 30V` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 342 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: JSMSEMI HT7550 30V datasheet (9 pp, sha256 5be329f882a66b6e, 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