XL2596S-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. Operates from 4.5V to 40V DC. Bypass to GND with a suitably large capacitor (e.g. 470uF/35V in the typical app) to eliminate noise on the input. Absolute maximum -0.3 to 45V.
2	OUTPUT	output	Power switch output (SW). Internal NPN power transistor emitter/switch node that drives the external inductor and catch (Schottky) diode. Rated for 3A continuous load current with duty cycle up to 100%.
3	GND	power_in	Ground pin. Layout critical: route outside of the Schottky diode-to-output-capacitor ground path to prevent switching current spikes from injecting voltage noise into the XL2596. Metal tab is also tied to GND.
4	FEEDBACK	input	Feedback pin (FB). Senses the output voltage through an external resistor divider and regulates it to the internal 1.23V reference. For the fixed-5.0V version this pin is tied directly to VOUT (no divider needed).
5	ON/OFF	input	Enable pin with hysteresis. Drive LOW (or float, default low) to turn the device ON; drive HIGH to shut it down (TTL shutdown capable). 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.

XL2596S-5.0E1
XL2596S-5.0E1S-3.3E1
XL2596S-5.0E1S-ADJE1
XL2596S-5.0E1S-12E1
XL2596S-5.0E1T-5.0E1
XL2596S-5.0E1T-3.3E1
XL2596S-5.0E1T-ADJE1
XL2596S-5.0E1T-12E1

CAD (KiCad official)

Symbol: XL2596S-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
`xl2596s-5-0e1.step`	180 KB	You want the bare part, or you mark your own boards.
`xl2596s-5-0e1-etched.step`	2.4 MB	You want the part with `XL2596S-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: 617 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 (14 pp, sha256 c2a385c60d33d0a3, 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