QX2303L50T from QX Micro Devices, 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	Device ground / power return.
2	LX	output	Switching node - drain of the internal power NMOS. Connect to the boost inductor and Schottky diode anode. Absolute maximum LX voltage 7 V, peak switch current up to 1000 mA (typical current limit 800 mA).
3	VOUT	power_in	Output-voltage sense / device supply pin. Connect to the regulated output rail (nominally 5.0 V for the '50' suffix) after the Schottky diode; the internal feedback divider senses this node. Absolute maximum 7 V.

Key specifications

Parameter	Value
Manufacturer	QX Micro Devices
Package	SOT-23
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

QX2303L50TT
QX2303L50TE
QX2303L50TPO
QX2303L50TF

CAD (KiCad official)

Symbol: QX2303L50T
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
`qx2303l50t.step`	59 KB	You want the bare part, or you mark your own boards.
`qx2303l50t-etched.step`	2.0 MB	You want the part with `QX2303L50T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 481 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: QX Micro Devices datasheet (14 pp, sha256 80cb4ae49c2e83f6, 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