Electrical scope
The current manufacturer table lists 5–32 V, 300 kHz, 4 A and a 0.8 V feedback reference. Enable, layout and thermal limits remain circuit-dependent.
Manufacturer model / selection entry
XL4003 Buck Converter IC – 4A, TO252-5L, Datasheet
XL4003 is a 300 kHz, 4 A-class bare buck-converter IC with a 5–32 V operating input range and the manufacturer’s TO252-5L package.
Buyer and engineer answers
What must be established before ordering
Statements below are scoped to the named manufacturer source. Commercial availability is deliberately separate.
Package and ordering
Use the original package drawing: TO252-5L. XL4003E1 is the separate exact ordering code; third-party “six-pin” wording is not copied.
IC and application boundary
Compare XL4003 with XL4005 by current class, package, thermal path and conditions, not by a seller’s inventory description.
Publication safeguard
The claim boundary travels with the page.
Resolve package and pin-count wording against the manufacturer drawing, never a copied marketplace field.
Published exact parts1
Evidence-backed families1
Procurement FAQ
Questions this exact page answers
Compatibility answers remain conditional where the source evidence does not establish a direct replacement.
XL4003 vs XL4005?
The manufacturer lists different current classes and TO252-5L versus TO263-5L packages; verify the application conditions.
Is TO252-5L the same footprint as listings that say 6 pins?
Use the manufacturer package and pin drawing; third-party pin-count wording is not authoritative.
What is E1?
It is handled as the exact orderable code, separate from the XL4003 base-model page.
Evidence-cleared exact records
Choose the manufacturer and complete code
Each link is a separate Passed catalog record with valid datasheet evidence.
XL4003E1
XLSEMI · TO252-5L
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