XL2576S-5.0E1 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	VIN	power_in	Supply Voltage Input Pin. Operates from 4.5V to 40V DC. Bypass VIN to GND with a suitably large capacitor (e.g. 100uF/50V) to eliminate input switching noise.
2	SW	power_out	Power Switch Output Pin. Switch node driven by the internal NPN power transistor (Vsat ~1.3V at 3A). Connects to the external inductor and freewheeling Schottky diode (e.g. 1N5820). Absolute max -0.3V to Vin.
3	GND	power_in	Ground Pin. Care must be taken in layout: route outside of the Schottky-diode-to-output-capacitor ground path to prevent switching current spikes from inducing voltage noise into the XL2576. Metal tab is also GND.
4	FB	input	Feedback Pin. Senses the output voltage through an external resistor divider network and regulates it. The internal feedback threshold voltage is 1.23V. Absolute max -0.3V to Vin.
5	EN	input	Enable Pin with hysteresis. Drive EN low (<0.8V) to turn the regulator ON; drive high (>1.4V) to turn it OFF. Floating defaults low (regulator ON). Input leakage 5uA typ @ VEN=2.5V. Absolute max -0.3V to Vin.

Key specifications

Parameter	Value
Manufacturer	XLSEMI
Package	TO-263-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

XL2576S-5.0E1
XL2576S-5.0E1S-ADJE1
XL2576S-5.0E1S-12E1
XL2576S-5.0E1T-5.0E1
XL2576S-5.0E1T-ADJE1

CAD (KiCad official)

Symbol: XL2576S-5.0E1
Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
3D model: TO-263-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`xl2576s-5-0e1.step`	180 KB	You want the bare part, or you mark your own boards.
`xl2576s-5-0e1-etched.step`	2.2 MB	You want the part with `XL2576S-5.0E1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 580 faces against 135 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 (15 pp, sha256 c3857bfcd9cf7c08, 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