XL2596S-ADJE1 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 a 4.5V to 40V DC voltage (absolute max 45V). Bypass VIN to GND with a suitably large capacitor (e.g., 470uF/35V) to eliminate noise on the input.
2	OUTPUT	output	Power Switch Output Pin (SW). This is the internal switch node that supplies power to the output through the external inductor and Schottky diode. Rated for 3A continuous.
3	GND	power_in	Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching ground-current spikes from inducing voltage noise into the XL2596. Metal tab is also GND.
4	FEEDBACK	input	Feedback Pin (FB). Through an external resistor divider network, FEEDBACK senses the output voltage and regulates it. The feedback threshold voltage is 1.23V (typ). Absolute max -0.3V to VIN.
5	ON/OFF	input	Enable Pin. Drive ON/OFF pin low to turn on the device; drive it high to turn it off. Floating is default low (enabled). TTL-compatible with hysteresis. 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-ADJE1
XL2596S-ADJE1S-3.3E1
XL2596S-ADJE1S-5.0E1
XL2596S-ADJE1S-12E1
XL2596S-ADJE1T-ADJE1
XL2596S-ADJE1T-3.3E1
XL2596S-ADJE1T-5.0E1
XL2596S-ADJE1T-12E1

CAD (KiCad official)

Symbol: XL2596S-ADJE1
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-adje1.step`	180 KB	You want the bare part, or you mark your own boards.
`xl2596s-adje1-etched.step`	2.3 MB	You want the part with `XL2596S-ADJE1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 596 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