component
ws4665d-8
Public Unreviewedby Ray
WILLSEMI Will Semicon AC-DC Controllers and Regulators, WDFN-8(2x2). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownWS4665D-8
WILLSEMI Will Semicon · AC-DC Controllers and Regulators · WDFN-8(2x2)
WS4665D-8 from WILLSEMI Will Semicon, in a WDFN-8(2x2). 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 | Switch input (power input to the N-channel MOSFET switch, 0.8 V to 5.5 V). Tied internally in parallel with pin 2. Recommended input bypass capacitor (~1 µF ceramic) placed close to the pin to minimize VIN dip during inrush. |
| 2 | VIN | power_in | Switch input (second VIN pad paralleled with pin 1 for high-current capability, 0.8 V to 5.5 V). Recommended input bypass capacitor for minimizing VIN dip during inrush. |
| 3 | ON | input | Active-high switch enable/control input. Low threshold - VIH = 1.2 V min, VIL = 0.4 V max (VBIAS = 2.5 V to 5.5 V) - compatible with 1.2 V/1.8 V/2.5 V/3.3 V logic. Absolute maximum VON = 6 V. Must NOT be left floating; drive high or low. |
| 4 | VBIAS | power_in | Bias supply for internal control logic and charge pump. Recommended range 2.5 V to 5.5 V (absolute max 6 V). Quiescent current typ 66 µA at VBIAS = 5 V, 35 µA at VBIAS = 2.5 V (VON = high). |
| 5 | GND | power_in | Device ground reference for control logic and QOD pull-down return. |
| 6 | CT | passive | Switch slew-rate / rise-time control. Connect a capacitor to GND to set VOUT rise time (e.g. CT = 1 nF gives tR ≈ 2236 µs at VIN=VBIAS=5 V). Internal node voltage can reach up to 11 V, so use a CT capacitor rated ≥ 25 V. May be left floating for the fastest rise time. |
| 7 | VOUT | power_out | Switch output (drain-side of the pass FET). Tied internally in parallel with pin 8 for high-current routing. Discharged to GND through the internal 230 Ω QOD resistor when the switch is off. |
| 8 | VOUT | power_out | Switch output (second VOUT pad paralleled with pin 7 for high-current capability up to 6 A continuous). Quick output discharge via ~230 Ω on-chip resistor when disabled. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| Package | WDFN-8(2x2) |
| Category | PMIC |
| Pins | 8 |
Ordering variants
WS4665D-8/TR
CAD (KiCad official)
- Symbol:
WS4665D-8 - Footprint:
Package_DFN_QFN:WDFN-8_2x2mm_P0.5mm - 3D model: WDFN-8(2x2) (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WILLSEMI Will Semicon datasheet (None pp, sha256
a40c644c8f3d2ee1, 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).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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