LM2585S-12 Equivalent & Substitute Parts

Part Overview

The LM2585S-12 is a boost, flyback, and forward converter switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed to deliver a fixed 12V output at 3A (switch current) from input voltages ranging from 4V to 40V. The device operates at 100kHz switching frequency and is housed in a TO-263-6 (D2PAK) surface mount package.

The LM2585S-12 is classified as obsolete, which necessitates identification of equivalent substitute parts for new designs and ongoing production requirements. Active equivalent models ensure continued component availability and compliance with current manufacturing standards.

Substiute Parts

LM2585S-12

Texas InstrumentsIn Stock: 2603LM2585S-12 Datasheet

Current PartRFQ

LM2585S-12/NOPB

Texas InstrumentsIn Stock: 773LM2585S-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2585S-12 is determined by strict equivalence across the following critical parameters:

• Input voltage range: 4V to 40V
• Fixed output voltage: 12V
• Output current capability: 3A (switch)
• Switching frequency: 100kHz
• Topology support: Boost, Flyback, Forward Converter
• Package type: TO-263-6 (D2PAK with 5 leads + tab)
• Surface mount configuration
• Operating temperature range: -40°C to 125°C

Parts meeting all these specifications are classified as direct equivalents. Packaging format (tube vs. alternative) does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The LM2585S-12/NOPB is the direct functional equivalent of the LM2585S-12. Both parts are identical in electrical specifications, topology support, output characteristics, and physical packaging.

The primary distinction is product status: the LM2585S-12 is obsolete, while the LM2585S-12/NOPB maintains active production status. Additionally, the LM2585S-12/NOPB carries ROHS3 compliance certification, whereas the original LM2585S-12 is RoHS non-compliant. For applications requiring RoHS compliance or long-term component availability, the LM2585S-12/NOPB is the appropriate selection.

Both parts share identical moisture sensitivity levels (MSL 3, 168 hours) and REACH/ECCN classifications, ensuring equivalent handling and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the LM2585S-12/NOPB be used as a direct replacement for the LM2585S-12?

A: Yes. The LM2585S-12/NOPB is electrically and mechanically identical to the LM2585S-12. All electrical parameters, output specifications, and package dimensions are equivalent. The primary difference is product status (active vs. obsolete) and RoHS compliance certification.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix denotes "No Plumbum" (lead-free) packaging and is associated with RoHS3 compliance. This indicates the part meets current lead-free manufacturing standards.

Q: Are there any differences in handling or storage requirements between these parts?

A: Both parts carry identical moisture sensitivity levels (MSL 3, 168 hours), requiring the same storage and handling protocols. No additional precautions are necessary when transitioning between these parts.

Q: Can either part be used in boost, flyback, and forward converter topologies?

A: Yes. Both the LM2585S-12 and LM2585S-12/NOPB support all three topologies: boost, flyback, and forward converter configurations. Topology selection depends on application requirements, not part selection.

Q: Is the TO-263-6 (D2PAK) package compatible with standard PCB layouts designed for the original part?

A: Yes. Both parts use identical TO-263-6 (D2PAK with 5 leads + tab) surface mount packaging. PCB layouts, footprints, and thermal management designs require no modification.