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LM2678SX-3.3 — DPAK / D2PAK (TO-252/263) package (representative)
DPAK / D2PAK (TO-252/263)
Representative of package type
National Semiconductor Corp

LM2678SX-3.3

Switching Regulator · TO-263-7 · Analog
Data last refreshed Jun 19, 2026
Manufacturer
National Semiconductor Corp
Mfr Part #
LM2678SX-3.3
Series
LM2678
Category
Switching Regulator
Datasheet
View datasheet ↗
Availability & Pricing
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Product Attributes

Electrical & Parametric
Output Current5A
Input Voltage8V-40V
Output Voltage3.3V fixed
Physical & Thermal
Package / CaseTO-263-7
Mounting TypeSurface Mount
SeriesLM2678
Operating Temperature-40°C ~ 125°C
Classification & Lifecycle
CategorySwitching Regulator
TypeAnalog

5A step-down SIMPLE SWITCHER regulator, fixed 3.3V output

Part Activity

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Recent search and sourcing activity for LM2678SX-3.3.

Engineering FAQ

What are the key specifications of LM2678SX-3.3?
Output Current: 5A; Input Voltage: 8V-40V; Output Voltage: 3.3V fixed.
What package is LM2678SX-3.3 supplied in?
LM2678SX-3.3 is supplied in the TO-263-7 package, surface mount, rated -40°C ~ 125°C.
Can ZDI source LM2678SX-3.3 beyond the quantities shown?
Yes — ZD Integrated Circuits specializes in sourcing hard-to-find, obsolete, and excess electronic components through its global network, with counterfeit-avoidance inspection on every lot. Submit an RFQ with your target quantity for availability and pricing.

Documents & Media

Quality & Counterfeit Avoidance

ISO 9001 ERAI Member ESD Certified GIDEP Participant ZDI EQuality Process CAGE Code 1V8K2

ZD Integrated Circuits operates an ISO 9001-certified quality system incorporating JEDEC-standard process-control elements. In an era of global sourcing and internet procurement, standards compliance alone no longer assures component authenticity — so ZDI pioneered a multi-layered counterfeit-avoidance program: supplier analysis at the source-country level, detailed component analysis, defined inspection standards for all incoming devices, and stringent supplier rating and review. These programs let ZDI guarantee the integrity and the source of every component it ships.

Every lot moves through ZDI's EQuality Process™ — validation, QI-1 and QI-2/camera inspection, RoHS verification, bake and bag-and-tag, and QI-3 final inspection — with Quality-Manager disposition before release. Nonconforming material is quarantined; conforming material is warehoused or shipped.

✓Multi-stage EQuality Process™ inspection (QI-1 · QI-2/camera · QI-3)
✓Source-country supplier analysis, rating & review
✓Incoming inspection, RoHS verification, bake, full lot traceability
✓ESD-controlled handling · authentic parts guaranteed

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