component
WL2803E18-5
Public Made by Adomby adom
WILLSEMI(Will Semicon) Linear Voltage Regulators (LDO), SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownWL2803E18-5
WILLSEMI(Will Semicon) · Linear Voltage Regulators (LDO) · SOT-23-5L
WL2803E18-5 from WILLSEMI(Will Semicon), in a SOT-23-5L. 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 | VIN | power_in | Input supply pin, operating range 2.5V to 5.5V. |
| 2 | GND | power_in | Ground. |
| 3 | EN | input | Active-high enable input; logic high at least 1.2V turns the output on, logic low at most 0.4V shuts it down. |
| 4 | NC | unconnected | No connection. |
| 5 | VOUT | power_out | Regulated output, 500mA output current, 1.8V fixed output for this variant. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI(Will Semicon) |
| Package | SOT-23-5L |
| 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 |
|---|---|---|---|---|---|---|---|
| Dropout Voltage | VDROP | 130 | 230 | mV | VOUT=VOUT*0.98, IOUT=500mA | 4 | |
| Line Regulation | ΔVLINE | 5 | 10 | mV | VOUT=3.3V, VIN=4.3~6.0V, IOUT=1mA | 4 | |
| Load Regulation | ΔVLoad | 10 | 30 | mV | VOUT=3.3V, IOUT=1~500mA | 4 | |
| Quiescent Current | IQ | 150 | 200 | uA | VOUT=3.3V, IOUT=0 | 4 | |
| Shut-down Current | ISHDN | 0.1 | 1 | uA | 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, IOUT=0mA | 4 | ||
| Input voltage range (abs max) | VIN | -0.3 | 6.5 | V | 3 | ||
| Output voltage range (abs max) | VOUT | -0.3 | V | max is VIN | 3 | ||
| Power dissipation (1 sq inch pad) | PD | 0.7 | W | FR-4, 1 square inch pad, dual side, 1oz copper | 3 | ||
| Power dissipation (min pad) | PD | 0.5 | W | FR-4, minimum pad size, 1oz copper | 3 | ||
| Junction temperature | TJ | 150 | oC | 3 | |||
| Lead temperature (10s) | TL | 260 | oC | 3 | |||
| Storage temperature | Tstg | -55 | 150 | oC | 3 | ||
| Operating Supply voltage | VIN | 2.5 | 5.5 | V | 3 | ||
| Operating Temperature Range | Topr | -40 | 85 | oC | 3 | ||
| Thermal resistance (1 sq inch pad) | RθJA | 180 | oC/W | FR-4, 1 square inch pad, dual side, 1oz copper | 3 | ||
| Thermal resistance (min pad) | RθJA | 250 | oC/W | FR-4, minimum pad size, 1oz copper | 3 | ||
| ESD HBM | -8000 | 8000 | V | HBM | 3 | ||
| ESD MM | -400 | 400 | V | MM | 3 | ||
| Current Limit | ILIM | 0.65 | A | VIN=5V | 4 | ||
| PSRR 1kHz | PSRR | 65 | dB | VIN=(VOUT+1V)DC+0.2VP-P, F=1KHz, IOUT=10mA | 4 | ||
| PSRR 10kHz | PSRR | 58 | dB | VIN=(VOUT+1V)DC+0.2VP-P, F=10KHz, IOUT=10mA | 4 | ||
| Output noise voltage | eNO | 100 | µVP-P | 10Hz to 100KHz, COUT=4.7μF | 4 | ||
| Thermal shutdown threshold | TSD | 165 | oC | 4 | |||
| Thermal shutdown hysteresis | ΔTSD | 30 | oC | 4 |
CAD (KiCad official)
- Symbol:
WL2803E18-5 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
wl2803e18-5-etched.step/wl2803e18-5-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wl2803e18-5.step/wl2803e18-5.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WILLSEMI(Will Semicon) datasheet (10 pp, sha256
9792bb099f4840d0, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).