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WL9004S5-28

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by Ray

WPMtek Wei Pan Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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WL9004S5-28

WPMtek Wei Pan Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L

WL9004S5-28 from WPMtek Wei Pan Microelectronics, 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 Supply input pin (2.0-5.5 V). Must be closely decoupled to GND with a ≥1 µF ceramic capacitor to ensure input stability and low noise.
2 GND power_in Device ground reference. Return path for both input and output capacitors; keep trace short and wide for best transient response and PSRR.
3 EN input Enable control input, active high (VCEH ≥ 1.2 V; VCEL ≤ 0.4 V). Internal ~1 MΩ pull-down resistor to GND; do not leave EN floating. IEN ~0.01 µA.
4 NC unconnected No connect. Leave floating or tie to GND; no internal electrical connection.
5 VOUT power_out Regulated 2.8 V fixed output (±2% accuracy) capable of 500 mA. A ≥1 µF low-ESR ceramic capacitor (X7R/X5R) must be connected from VOUT to GND for stability.

Key specifications

Parameter Value
Manufacturer WPMtek Wei Pan Microelectronics
Package SOT-23-5L
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • WL9004S5-28S5-12
  • WL9004S5-28S5-15
  • WL9004S5-28S5-18
  • WL9004S5-28
  • WL9004S5-28S5-30
  • WL9004S5-28S5-33

The extractor listed these alongside WL9004S5-28, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • WL9004S5-25

CAD (KiCad official)

  • Symbol: WL9004S5-28
  • 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: WPMtek Wei Pan Microelectronics datasheet (14 pp, sha256 77b547b1c78ae4b9, 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