XL6019E1 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 pin. Common return for input, output and internal circuitry.
2	EN	input	Enable pin. TTL-compatible: logic low shuts the converter down, logic high enables operation. Threshold typ. 1.4V (high) / 0.8V (low). Floating is treated as high. VEN range -0.3V to VIN.
3	SW	output	Power switch output. Drain of the internal N-channel power MOSFET; connect to the inductor/diode boost node. Absolute max VSW = 60V, internal SW overvoltage clamp typ. 60V. Also brought out on the metal tab.
4	VIN	power_in	Power supply input, 5V to 40V DC. Requires a bulk electrolytic capacitor between VIN and GND to suppress noise. Absolute max 45V.
5	FB	input	Output-voltage feedback sense pin. Internal reference is 1.25V; set VOUT with a resistor divider using VOUT = 1.25 × (1 + R2/R1).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

XL6019E1

CAD (KiCad official)

Symbol: XL6019E1
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 (14 pp, sha256 a08dcab1375258c6, 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