XL4016E1 from XLSEMI, in a TO-220-5. 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 (0V return).
2	FB	input	Feedback input for output voltage regulation. An external resistor divider from VOUT sets the output; internal reference is 1.25V. VOUT = 1.25 * (1 + R2/R1). Absolute max 7V.
3	SW	output	Power switch output node (drain of internal PMOS). Connects to the external inductor and freewheeling Schottky diode. Also connected internally to the exposed metal tab. Peak switch current up to 12A (14A typ limit).
4	VC	passive	Internal voltage regulator bypass pin. Connect a 1uF ceramic capacitor between VIN and VC.
5	VIN	power_in	Power supply input, DC 8V to 36V recommended operating range (40V absolute max). Requires a bulk electrolytic capacitor to GND (e.g. 470uF/50V) to reduce input noise.

Key specifications

Parameter	Value
Manufacturer	XLSEMI
Package	TO-220-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

XL4016E1

CAD (KiCad official)

Symbol: XL4016E1
Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
3D model: TO-220-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`xl4016e1.step`	104 KB	You want the bare part, or you mark your own boards.
`xl4016e1-etched.step`	617 KB	You want the part with `XL4016E1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 178 faces against 69 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 (10 pp, sha256 af9fe1b7a2838fe9, 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