PJ73AL30SC from PJSEMI, in a SOT-23-3. 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. Common return for input and output capacitors; connect to the single-point ground plane with a wide, short trace back to CIN and COUT.
2	VOUT	power_out	Regulated output voltage (3.0V ±2% for the -30 option), 300mA max. Requires a ≥1μF ceramic (X7R/X5R) capacitor to GND placed as close as possible for stability. Short-circuit protected at ~250mA and current-limited at ~530mA.
3	VIN	power_in	Unregulated supply input, up to +20V absolute maximum (+22V abs. max.). Bypass with a ≥1μF ceramic capacitor to GND, placed as close as possible to the pin to decouple supply glitches.

Key specifications

Parameter	Value
Manufacturer	PJSEMI
Package	SOT-23-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

PJ73AL30SC
PJ73AL30SCSA
PJ73AL30SCSQ
PJ73AL30SCSE

CAD (KiCad official)

Symbol: PJ73AL30SC
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`pj73al30sc.step`	59 KB	You want the bare part, or you mark your own boards.
`pj73al30sc-etched.step`	1.9 MB	You want the part with `PJ73AL30SC` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 446 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: PJSEMI datasheet (9 pp, sha256 594527d1f30258ee, 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