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WL2810D33-4

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WILLSEMI(Will Semicon) Linear Voltage Regulators (LDO), XDFN-4-EP(1x1). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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WL2810D33-4

WILLSEMI(Will Semicon) · Linear Voltage Regulators (LDO) · XDFN-4-EP(1x1)

WL2810D33-4 from WILLSEMI(Will Semicon), in a XDFN-4-EP(1x1). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VOUT power_out Regulated output of the LDO; the datasheet gives an output range of 1.0 V to 3.3 V and a 300 mA output current rating.
2 GND power_in Ground reference pin for the regulator.
3 EN input Active-high enable; EN logic high voltage (VENH) is 1.2 V minimum and logic low voltage (VENL) is 0.4 V maximum at VIN=5.5 V, and the shutdown current is 1.0 µA maximum with VEN=0 V.
4 VIN power_in Regulator input supply; the operating supply voltage is 2.2 V to 5.5 V, with an absolute maximum VIN range of -0.3 V to 6.5 V.
5 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer WILLSEMI(Will Semicon)
Package XDFN-4-EP(1x1)
Category Power Management ICs
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output voltage (VOUT>1.5V row, 3.3V variant) VOUT 0.98 1.02 V VOUT>1.5V, IOUT=1mA 4
Dropout voltage VDROP 220 330 mV VOUT=3.3V, IOUT=300mA 4
Line regulation ΔVLINE 0.01 0.1 %/V VIN=2.7~5.5V, IOUT=1mA 4
Load regulation ΔVLoad 10 30 mV VOUT=2.8V , IOUT=1~300mA 4
Quiescent current IQ 42 70 μA VOUT=2.8V, IOUT=0 4
Shut-down current ISHDN 1 μA VEN=0V 4
EN logic high voltage VENH 1.2 V VIN=5.5V, IOUT=1mA 4
EN logic low voltage VENL 0.4 V VIN=5.5V, VOUT=0V 4
EN input current IEN 1 μA VEN= 0 to 5.5V 4
Power supply rejection rate PSRR 70 dB VIN=(VOUT+1V)DC+0.5VP-P F=217Hz ,Iout=10mA 4
Power supply rejection rate PSRR 60 dB VIN=(VOUT+1V)DC+0.5VP-P F=10KHz, Iout=10mA 4
Current limit ILIM 300 mA VEN=VIN 4
Short current ISHORT 80 mA VEN=VIN, VOUT Short to GND with 1Ω 4
Output noise voltage eNO 55 μVRMS 10Hz to 100KHz, COUT=1μF 4
Thermal shutdown threshold TSD 165 °C 4
Thermal shutdown hysteresis ΔTSD 30 °C 4
Power dissipation 400 mW TA=25℃ 3
VIN range -0.3 6.5 V 3
VEN range -0.3 V 3
VOUT range -0.3 V 3
Output current IOUT 400 mA 3
Lead temperature range 260 °C 3
Storage temperature range -55 150 °C 3
Operating junction temperature range 150 °C 3
ESD HBM 8000 V 3
ESD MM 400 V 3
Operating supply voltage 2.2 5.5 V 3
Operating temperature range -40 85 °C 3
Thermal resistance, junction-to-ambient (DFN1x1-4L) RθJA 250 °C/W DFN1x1-4L package 3

CAD (KiCad official)

  • Symbol: WL2810D33-4
  • Footprint: Package_DFN_QFN:OnSemi_XDFN4-1EP_1.0x1.0mm_EP0.52x0.52mm
  • 3D model: XDFN-4-EP(1x1) (KiCad packages3D, STEP)
  • 3D model files: wl2810d33-4-etched.step / wl2810d33-4-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); wl2810d33-4.step / wl2810d33-4.glb are the bare package body.

Provenance

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

  • Datasheet: WILLSEMI(Will Semicon) datasheet (12 pp, sha256 e0fad9e03b483a34, retrieved 2026-10-29, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF