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WL2803E12-5

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by Ray

WILLSEMI Will Semicon Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

Schematic Symbol

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Datasheet

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Contents

README

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WL2803E12-5

WILLSEMI Will Semicon · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L

WL2803E12-5 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 Unregulated input supply, 2.5V to 5.5V (absolute max -0.3V to 6.5V). Decouple with 4.7uF ceramic close to the pin.
2 GND power_in Device ground reference and return path for input/output currents.
3 EN input Enable input, active high. VENH >= 1.2V enables the regulator; VENL <= 0.4V places the part in shutdown (ISHDN ~0.1uA typ). Do not leave floating.
4 NC unconnected Not connected internally. May be left floating or tied to GND for mechanical stability.
5 VOUT power_out Regulated LDO output, 1.2V for the WL2803E12-5 variant, capable of 500mA continuous. Requires 4.7uF ceramic output cap (>=10uF recommended when VOUT<2V) for stability.

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.

  • WL2803E12-5/TR
  • WL2803E18-5/TR
  • WL2803E25-5/TR
  • WL2803E28-5/TR
  • WL2803E30-5/TR
  • WL2803E33-5/TR

CAD (KiCad official)

  • Symbol: WL2803E12-5
  • 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