LM2575T-15 Equivalent & Substitute Parts

Part Overview

The LM2575T-15 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 15V positive output. This through-hole mounted component operates across a 4V to 40V input range and delivers 1A output current at 52kHz switching frequency. The part is currently in Last Time Buy status, making identification of equivalent alternatives essential for ongoing design support and procurement planning.

Substiute Parts

LM2575T-15

Texas InstrumentsIn Stock: 3247LM2575T-15 Datasheet

Current PartRFQ

LM2575T-15/NOPB

Texas InstrumentsIn Stock: 5323LM2575T-15/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2575T-15 is determined by strict equivalence across the following critical parameters:

• Topology and function (buck converter, step-down operation)
• Output voltage specification (fixed 15V positive)
• Output current capability (1A minimum)
• Input voltage operating range (4V to 40V)
• Package and pinout (TO-220-5)
• Switching frequency (52kHz)
• Thermal operating range (-40°C to 125°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The LM2575T-15/NOPB variant meets all these criteria and is classified as a direct manufacturer-recommended substitute. The primary distinction is packaging format (tube versus bulk) and product status transition (Last Time Buy to Active).

Parameter Comparison

Engineering Selection Recommendations

The LM2575T-15/NOPB is the direct equivalent for the LM2575T-15. Both parts share identical electrical specifications, thermal characteristics, and compliance certifications. The transition from Last Time Buy to Active product status for the /NOPB variant ensures continued availability and supply chain stability. Selection between these parts depends on procurement requirements: the /NOPB variant in tube packaging is recommended for new designs and ongoing production due to its active status and higher inventory availability (5300 pcs versus 3148 pcs).

Frequently Asked Questions (FAQ)

Q: Can the LM2575T-15/NOPB directly replace the LM2575T-15 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The /NOPB designation indicates tube packaging and active product status. Pin configuration, electrical performance, and thermal characteristics are equivalent.

Q: What does the /NOPB suffix mean?

A: The /NOPB suffix indicates "No Lead Free Matte Tin" packaging designation used by Texas Instruments. This is a packaging and compliance notation that does not affect electrical functionality or performance.

Q: Why is the LM2575T-15 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is transitioning this part number variant to the /NOPB version. The LM2575T-15/NOPB is the active continuation and recommended selection for new procurement.

Q: Are there differences in thermal performance between these parts?

A: No. Both parts operate across the identical temperature range (-40°C to 125°C junction temperature) and share the same thermal characteristics in the TO-220-5 package.

Q: What is the significance of the TO-220-5 package?

A: TO-220-5 is a through-hole mounted package with five leads. This package type is standardized and interchangeable between the main part and substitute. PCB footprints and thermal management approaches remain identical.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the LM2575T-15 and LM2575T-15/NOPB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.