component

WD1042E-5

Public Unreviewed

by Ray

WILLSEMI Will Semicon DC-DC Converters, SOT-23-5L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmicwd1042e-5
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

WD1042E-5

WILLSEMI Will Semicon · DC-DC Converters · SOT-23-5L

WD1042E-5 from WILLSEMI Will Semicon, in a SOT-23-5L. 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 EN input Enable control input. Pull high (>1.4V typ.) to turn the converter on; pull below 0.4V to enter shutdown mode (IQ ~0.2uA). Do not leave floating. Absolute max range -0.3V to VIN.
2 GND power_in Device ground return for both analog and power stages.
3 SW output Switching node. Connect the external power inductor between SW and the output capacitor. Internally driven by the synchronous P-channel high-side and N-channel low-side MOSFETs. Absolute max range -0.3V to VIN (DC).
4 VIN power_in Input supply pin, 2.5V to 5.5V operating range (absolute max 6.0V). Decouple to GND with at least a 10uF ceramic capacitor placed close to the pin.
5 FB input Feedback input, regulated to the internal 0.6V (±2%) reference. Connect to the midpoint of an external resistor divider from VOUT for adjustable output (VOUT = 0.6V x (1 + R1/R2)); tie directly to VOUT for fixed-output usage. Absolute max range -0.3V to VIN; IFB ±30nA max.

Key specifications

Parameter Value
Manufacturer WILLSEMI Will Semicon
Package SOT-23-5L
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • WD1042E-5/TR

CAD (KiCad official)

  • Symbol: WD1042E-5
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: WILLSEMI Will Semicon datasheet (None pp, sha256 f73e0c0f1592aa20, 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).

Datasheet PDF