component
WL2855K33-3
Public Made by Adomby adom
WILLSEMI(Will Semicon) Linear Voltage Regulators (LDO), SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownWL2855K33-3
WILLSEMI(Will Semicon) · Linear Voltage Regulators (LDO) · SOT-89-3L
WL2855K33-3 from WILLSEMI(Will Semicon), in a SOT-89-3L. 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 | GND | power_in | Ground reference pin for the regulator. |
| 2 | VIN | power_in | Input pin with an operating supply range of 2.5V to 12V and an absolute maximum VIN range of -0.3V to 13.5V. |
| 3 | VOUT | power_out | Regulated output pin with an output voltage range of 1.2V to 5V and an absolute maximum VOUT range of -0.3V to 5.5V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI(Will Semicon) |
| Package | SOT-89-3L |
| Category | Power Management ICs |
| Pins | 3 |
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>2.5V), printed as 0.99Vout to 1.01Vout | VOUT | 0.99 | 1.01 | x VOUT | VOUT>2.5V; printed as 0.99* Vout (min) and 1.01* Vout (max); Ta=25°C, VIN=VOUT+1V, CIN=COUT=1µF, IOUT=1mA | 4 | |
| Input Voltage | VIN | 2.5 | 12 | V | 4 | ||
| Current Limit | ILIM | 500 | mA | VIN≥3.3V | 4 | ||
| Dropout Voltage | VDROP | 940 | 1200 | mV | VOUT=3.3V, IOUT=500mA | 4 | |
| Line Regulation | ΔVLINE | 1 | 5 | mV | VIN=VOUT+1~12V | 4 | |
| Load Regulation | ΔVLoad | 30 | 50 | mV | IOUT=1~500mA | 4 | |
| Quiescent Current | IQ | 1 | 2.2 | μA | VIN=4V, IOUT=0 | 4 | |
| Short Current | ISHORT | 180 | mA | VOUT short to GND | 4 | ||
| Power Supply Rejection Rate | PSRR | 70 | dB | Vo=3.3V, Io=10mA, f=100Hz | 4 | ||
| Power Supply Rejection Rate | PSRR | 50 | dB | Vo=3.3V, Io=10mA, f=1kHz | 4 | ||
| Power Supply Rejection Rate | PSRR | 25 | dB | Vo=3.3V, Io=10mA, f=10kHz | 4 | ||
| Output Noise Voltage | eNO | 54 | μVRMS | Vo=3.3V, Io=30mA | 4 | ||
| Power Dissipation | PD | 1.5 | W | TA=25℃ | 3 | ||
| VIN Range | VIN | -0.3 | 13.5 | V | 3 | ||
| VOUT Range | VOUT | -0.3 | 5.5 | V | 3 | ||
| Lead Temperature Range | 260 | °C | 3 | ||||
| Storage Temperature Range | -55 | 150 | °C | 3 | |||
| Operating Junction Temperature Range | 150 | °C | 3 | ||||
| Operating Supply Voltage | 2.5 | 12 | V | 3 | |||
| Operating Temperature Range | -40 | 85 | °C | 3 | |||
| Thermal Resistance, RθJA (SOT-89-3L) | RθJA | 77 | °C/W | SOT-89-3L | 3 |
CAD (KiCad official)
- Symbol:
WL2855K33-3 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
wl2855k33-3-etched.step/wl2855k33-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wl2855k33-3.step/wl2855k33-3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WILLSEMI(Will Semicon) datasheet (12 pp, sha256
90e7ddca9a068e82, retrieved 2026-11-05, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).