XL3005E1 from XLSEMI, in a TO-263-5. 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	Ground reference pin for the device. Connect directly to system ground with a low-impedance return path.
2	CS	input	Output current-sense feedback input. Regulates the LED current by servoing the voltage across the external RCS sense resistor to the internal 0.21V reference (IOUT = 0.21V / RCS).
3	SW	output	Power-switch output / inductor switch node. Drain of the internal high-side power MOSFET; connect to the buck inductor and catch diode. The metal tab of the TO263-5L package is electrically SW.
4	VC	passive	Internal LDO / bootstrap bypass pin. Connect a 1 µF bypass capacitor between VIN and VC in typical applications to decouple the internal regulator.
5	VIN	power_in	Main DC power input, 8V to 36V (absolute maximum 40V). Bypass to GND with an electrolytic capacitor (e.g. 220 µF/50V) close to the pin to suppress input noise.

Key specifications

Parameter	Value
Manufacturer	XLSEMI
Package	TO-263-5
Category	LED-drv
Pins	5

Ordering variants

Same part, different packaging or reel option.

XL3005E1

CAD (KiCad official)

Symbol: XL3005E1
Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
3D model: TO-263-5 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: XLSEMI datasheet (15 pp, sha256 064cf2401d458a5c, retrieved 2026-08-17, tier: manufacturer)
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