component
WD1038DH-8
Public Made by Adomby adom
WILLSEMI Will Semicon DC-DC Converters, DFN-8-EP(2x2). 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
markdownWD1038DH-8
WILLSEMI Will Semicon · DC-DC Converters · DFN-8-EP(2x2)
WD1038DH-8 from WILLSEMI Will Semicon, in a DFN-8-EP(2x2). 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 | FB | input | Feedback pin connected to the feedback resistor divider for the adjustable version, or to VOUT for the fixed-output version; the datasheet reference voltage is 0.6 V (0.588 V to 0.612 V). |
| 2 | PG | output | Power-good open-drain output that needs an external pull-up; it is pulled high when FB is within 90% of nominal and is LOW otherwise, sinking up to 1 mA with a pull-up to a rail below 5.5 V. |
| 3 | IN | power_in | Input supply pin, operating from 2.7 V to 5.5 V, that must be decoupled to GND with at least 10 uF of ceramic capacitance. |
| 4 | PGND | power_in | Power ground for the power stage, which must also be connected to the exposed pad for maximum power dissipation. |
| 5 | NC | unconnected | No internal connection. |
| 6 | LX | output | Inductor (switch node) pin that connects to the output inductor; its PCB copper area should be kept minimal to avoid noise problems. |
| 7 | EN | input | Enable control that turns the regulator on when pulled high (VIH 1.4 V min, VIL 0.4 V max) and must not be left floating. |
| 8 | SGND | power_in | Signal ground for the control circuitry. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| Package | DFN-8-EP(2x2) |
| Category | Power Management (PMIC) |
| Pins | 9 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power Supply VCC | VCC | -0.3 | 6.5 | V | 3 | ||
| Others Pins | -0.3 | V | Max printed as VCC+0.6 V | 3 | |||
| Power Dissipation | PD | 2.19 | W | TA =25℃, DFN2X2-8L | 3 | ||
| Junction Temperature | TJ | 150 | °C | 3 | |||
| Lead Temperature (Soldering, 10 sec) | 260 | °C | Soldering, 10 sec | 3 | |||
| Storage Temperature Range | -65 | 150 | °C | 3 | |||
| Power Supply VCC | VCC | 2.7 | 5.5 | V | 3 | ||
| Junction temperature | TJ | -40 | 125 | °C | 3 | ||
| Ambient temperature | TA | -40 | 85 | °C | 3 | ||
| Package Thermal Resistance Junction-to-Ambient | TJA | 50 | °C/W | 3 | |||
| Package Thermal Resistance Junction-to-Case | TJC | 8 | °C/W | 3 | |||
| Operation Voltage Range | VIN | 2.7 | 5.5 | V | 4 | ||
| Feedback Reference | VREF | 0.588 | 0.6 | 0.612 | V | 4 | |
| Input OVP shutdown (falling) | VOVP | 5.7 | 6.1 | V | Falling | 4 | |
| Shutdown Current | ISD | 1 | μA | VEN =GND, VIN =3.6V | 4 | ||
| Quiescent Current (Switching) | IQ | 35 | uA | 4 | |||
| Quiescent Current (Non Switching) | IQ | 27 | uA | VFB=0.63V, Non Switching | 4 | ||
| VIN Under Voltage Lockout (rising) | VUVLO-H | 2.45 | V | VIN Rising | 4 | ||
| VIN Under Voltage Lockout (falling) | VUVLO-L | 2.35 | V | VIN Falling | 4 | ||
| Input OVP shutdown (rising) | VOVP | 6.4 | V | Rising | 4 | ||
| Line Regulation | ΔVOUT /ΔVIN | 0.35 | %/V | 4 | |||
| PFET Rdson | Rdson P | 80 | mΩ | 4 | |||
| NFET Rdson | Rdson N | 70 | mΩ | 4 | |||
| PFET Current Limit | ILIMT | 4.5 | A | 4 | |||
| Oscillator Frequency | FOSC | 1.5 | MHz | 4 | |||
| Max Duty Cycle | 100 | % | 4 | ||||
| Soft Start Time | 800 | uS | 4 | ||||
| Power on delay time | 25 | uS | 4 | ||||
| Over Voltage Protection Blanking Time | 20 | uS | 4 | ||||
| Thermal Shutdown | 150 | °C | 4 | ||||
| Thermal Shutdown Hysteresis | 25 | °C | 4 | ||||
| EN Input LOW Voltage | VIL | 0.4 | V | 4 | |||
| EN Input HIGH Voltage | VIH | 1.4 | V | 4 |
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 | 3) The PCB copper area associated with SW pin | 10 |
CAD (KiCad official)
- Symbol:
WD1038DH-8 - Footprint:
Package_DFN_QFN:DFN-8-1EP_2x2mm_P0.5mm_EP0.6x1.2mm - 3D model: DFN-8-EP(2x2) (KiCad packages3D, STEP)
- 3D model files:
wd1038dh-8-etched.step/wd1038dh-8-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wd1038dh-8.step/wd1038dh-8.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WILLSEMI Will Semicon datasheet (12 pp, sha256
598a938265306281, retrieved 2026-10-18, 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).