XL2001E1 from XLSEMI, in a SOIC-8. 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	FB	input	Feedback pin. The internal feedback threshold is fixed at 5V; the FB pin senses the regulated output. When FB drops below ~1.5V the short-circuit protection latches the converter off.
2	NC	unconnected	No connection. Leave floating or tie to a copper pour per layout preference.
3	VC	passive	Internal voltage regulator bypass. In a typical application connect a 1µF capacitor from VC to VIN to decouple the internal regulator/reference.
4	VIN	power_in	Supply voltage input, 8V to 45V DC (absolute max 50V). Bypass VIN to GND with a large capacitor (e.g. 47µF/50V) close to the pin to suppress input noise.
5	SW	output	Power switch node. Drain of the internal high-side PMOS; connect to the external inductor and the cathode of the freewheeling Schottky diode (e.g. SS36). Pins 5 and 6 are internally tied.
6	SW	output	Power switch node (paralleled with pin 5) for current handling. Connect together with pin 5 to the inductor/Schottky node.
7	GND	power_in	Ground return. Route outside of the Schottky-diode-to-output-capacitor ground loop to keep switching current spikes from injecting noise into the IC. Pins 7 and 8 are internally tied.
8	GND	power_in	Ground return (paralleled with pin 7). Star-connect at the input capacitor return; keep away from the high-di/dt Schottky/output-cap loop.

Key specifications

Parameter	Value
Manufacturer	XLSEMI
Package	SOIC-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

XL2001E1

CAD (KiCad official)

Symbol: XL2001E1
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`xl2001e1.step`	122 KB	You want the bare part, or you mark your own boards.
`xl2001e1-etched.step`	1.6 MB	You want the part with `XL2001E1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 405 faces against 147 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: XLSEMI datasheet (9 pp, sha256 538c3c7e556b83a5, retrieved 2026-08-17, tier: manufacturer)
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