WL2803E30-5 from WILLSEMI Will Semicon, in a SOT-23-5L. 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	Regulator input supply. Operating range 2.5V to 5.5V (absolute max 6.5V). Bypass with 4.7uF ceramic capacitor to GND close to the pin.
2	GND	power_in	Device ground reference. Common return for input and output capacitors.
3	EN	input	Enable input, active high. VENH >= 1.2V turns the regulator on; VENL <= 0.4V (with VIN=5.5V) puts the device into shutdown (ISHDN ~0.1uA typ). Do not float.
4	NC	unconnected	No internal connection. May be left floating or tied to GND for PCB routing convenience.
5	VOUT	power_out	Regulated output, 3.0V nominal (WL2803E30-5 variant), 500mA capable. Requires 4.7uF ceramic output capacitor (>= 10uF recommended when VOUT < 2V).

Key specifications

Parameter	Value
Manufacturer	WILLSEMI Will Semicon
Package	SOT-23-5L
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

WL2803E30-5/TR

CAD (KiCad official)

Symbol: WL2803E30-5
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5L (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: WILLSEMI Will Semicon datasheet (10 pp, sha256 9792bb099f4840d0, retrieved 2026-08-17, tier: lcsc)
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