component
WD1305E20-6
Public Made by Adomby adom
WILLSEMI Will Semicon DC-DC Converters, SOT-23-6L. 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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Contents
README
markdownWD1305E20-6
WILLSEMI Will Semicon · DC-DC Converters · SOT-23-6L
WD1305E20-6 from WILLSEMI Will Semicon, in a SOT-23-6L. 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 | BST | passive | Bootstrap pin: connect a 0.1µF capacitor between SW and BST to form a floating supply for the high-side switch driver. |
| 2 | GND | power_in | System ground and reference ground of the regulated output voltage, which requires extra care in PCB layout and must be connected to ground with copper traces and vias. |
| 3 | FB | input | Converter feedback input, connected to the output voltage through a feedback resistor divider (reference VFB 0.6V, -2% to 2%). |
| 4 | EN | input | Enable input, active high for automatic start-up, which can be tied to VIN directly or through a resistor; EN rising threshold is 1.4V and falling threshold is 0.4V. |
| 5 | VIN | power_in | Input supply pin, requires a decoupling capacitor and a wide PCB trace; operating supply range is 4.5V to 18V, with absolute maximum of -0.3 to +20V. |
| 6 | SW | output | Switch output pin, connected with a wide PCB trace to the inductor; DC absolute maximum range is -0.3 to VIN(Max)+0.3V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| Package | SOT-23-6L |
| Category | Power Management (PMIC) |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage Range | VIN | 4.5 | 18 | V | 4 | ||
| Supply Voltage (recommended) | VIN | 4.5 | 12 | 18 | V | 4 | |
| Operating Junction Temp. (TJ) | TJ | -40 | 125 | ℃ | 4 | ||
| Standby Supply Current | IQ | 70 | 100 | uA | VFB = 105%, IOUT = 0A | 4 | |
| Shutdown Supply Current | ISHDN | 2 | 5 | uA | VEN = 0V, Vin=12V | 4 | |
| Feedback reference Voltage | VFB | 0.6 | V | 4 | |||
| Feedback reference Voltage tolerance | VFB | -2 | 2 | % | 4 | ||
| Inductor valley Current Limit | ILIM | 2.4 | A | VIN = 12V, VOUT = 5V | 4 | ||
| Oscillator Frequency | fOSC | 500 | kHz | VFB or VOUT in regulation | 4 | ||
| RDS(ON) of HS FET | RPFET | 0.14 | Ω | ISW = 100mA | 4 | ||
| RDS(ON) of LS FET | RNFET | 0.11 | Ω | ISW = −100mA | 4 | ||
| Feedback Leakage Current | IFB | -30 | 30 | nA | VFB=0.85V | 4 | |
| SW Leakage Current | ILSW | -5 | 5 | uA | VIN = 12V, VSW = 0V or 12V | 4 | |
| EN Rising Threshold | VENH | 1.4 | V | 4 | |||
| EN falling Threshold | VENL | 0.4 | V | 4 | |||
| EN Leakage Current (VEN = 0V) | IEN | 1 | uA | VIN = 12V, VEN = 0V | 4 | ||
| EN Leakage Current (VEN = VIN) | IEN | 1 | 2 | uA | VIN = 12V, VEN = VIN | 4 | |
| Min On Time | 50 | nS | 4 | ||||
| Min Off Time | 100 | nS | 4 | ||||
| Soft Start Time | 800 | uS | 4 | ||||
| Input OVP Shutdown (rising) | VOVP | 19 | V | Rising | 4 | ||
| Input OVP Shutdown (falling) | VOVP | 18 | 18.5 | V | Falling | 4 | |
| Over Voltage Protection Blanking Time | 15 | uS | 4 | ||||
| Over Temperature Protection | TOTP | 155 | oC | 4 | |||
| OTP Hysteresis | 25 | oC | 4 | ||||
| VIN pin voltage range | VIN | -0.3 | 20 | V | 3 | ||
| EN pin voltage range | -0.3 | V | Upper limit printed as VIN | 3 | |||
| SW pin voltage range (DC) | VSW | -0.3 | V | Upper limit printed as VIN(Max)+0.3 | 3 | ||
| All Other Pins Voltage | -0.3 | 6 | V | 3 | |||
| Power Dissipation SOT23-6L | PD | 0.5 | W | SOT23-6L (Note 2) | 3 | ||
| Thermal resistance junction-to-ambient | RθJA | 250 | oC/W | Tested on EV5303-1.0 board | 3 | ||
| Thermal resistance junction-to-case | RθJC | 110 | oC/W | 3 | |||
| Maximum Junction Temperature | TJ | 150 | oC | 3 | |||
| Lead temperature (soldering) | TL | 260 | oC | Soldering, 10s | 3 | ||
| Operating ambient temperature | Topr | -40 | 85 | oC | 3 | ||
| Storage temperature | Tstg | -55 | 150 | oC | 3 | ||
| ESD HBM | HBM | 5500 | V | HBM | 3 | ||
| ESD CDM | CDM | 2000 | V | CDM | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | 2 GND System Ground pin. Reference ground of the regulated output voltage: requires extra care during PCB layout. Connect to GND with copper traces and vias. | 2 |
CAD (KiCad official)
- Symbol:
WD1305E20-6 - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6L (KiCad packages3D, STEP)
- 3D model files:
wd1305e20-6-etched.step/wd1305e20-6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wd1305e20-6.step/wd1305e20-6.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WILLSEMI Will Semicon datasheet (12 pp, sha256
9c4925c6dfcb8099, retrieved 2026-10-17, 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).