LM2575T-5.0/LB03 Equivalent & Substitute Parts

Part Overview

The LM2575T-5.0/LB03 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, delivering fixed 5V output at 1A in a TO-220-5 package. This part is designated Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring 5V regulated power from higher input voltage sources.

Substiute Parts

LM2575T-5.0/LB03

Texas InstrumentsIn Stock: 1141LM2575T-5.0/LB03 Datasheet

Current PartRFQ

LM2575T-5.0/NOPB

Texas InstrumentsIn Stock: 10224LM2575T-5.0/NOPB Datasheet

DirectRFQ

LM2575T-5.0/LF03

Texas InstrumentsIn Stock: 2512LM2575T-5.0/LF03 Datasheet

MFR RecommendedRFQ

LM2576TV-5G

onsemiIn Stock: 1984LM2576TV-5G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575T-5.0/LB03 is determined by the following critical parameters: fixed 5V output voltage, buck topology, TO-220-5 package form factor, and operating temperature range of -40°C to 125°C. Parts meeting these core requirements are classified as direct substitutes. Secondary considerations include output current rating, input voltage minimum specification, and product status (Active vs. Last Time Buy). Parts with higher current ratings or identical electrical specifications but different packaging designations are grouped separately to reflect their suitability for specific design requirements.

Parameter Comparison

Engineering Selection Recommendations

LM2575T-5.0/NOPB is a direct equivalent from Texas Instruments with identical electrical specifications and Active product status. This part is the primary substitute for the Last Time Buy LM2575T-5.0/LB03, offering the same 1A output current, 4V to 40V input range, and TO-220-5 package configuration. Higher inventory availability (10,200 pcs) supports immediate procurement.

LM2575T-5.0/LF03 is a manufacturer-recommended equivalent from Texas Instruments with identical electrical specifications and Active product status. The primary distinction is the formed leads package designation. This part maintains full compatibility with the original design and is suitable for applications where formed leads are preferred or required by assembly processes.

LM2576TV-5G is a manufacturer-recommended substitute from onsemi with the same 5V fixed output, 52kHz switching frequency, and TO-220-5 package. This part differs in output current capability (3A vs. 1A) and minimum input voltage specification (7V vs. 4V). Selection of this part is appropriate only when the application can accommodate the higher minimum input voltage and does not require the lower 1A current rating as a design constraint. The increased current capacity provides design margin for applications with higher transient load requirements.

Frequently Asked Questions (FAQ)

Q: Can LM2575T-5.0/NOPB be used as a direct replacement for LM2575T-5.0/LB03?

A: Yes. Both parts share identical electrical specifications, output voltage, current rating, input voltage range, switching frequency, operating temperature range, and package form factor. The primary difference is product status: LM2575T-5.0/NOPB is Active, while LM2575T-5.0/LB03 is Last Time Buy.

Q: What is the difference between LM2575T-5.0/LB03 and LM2575T-5.0/LF03?

A: Both parts are from Texas Instruments with identical electrical performance. The designation difference reflects packaging lead formation: LB03 indicates tube packaging with formed leads, while LF03 indicates tube packaging with a different lead formation specification. Both are suitable for TO-220-5 through-hole mounting.

Q: Can LM2576TV-5G replace LM2575T-5.0/LB03 in all applications?

A: LM2576TV-5G is compatible only in applications where the minimum input voltage of 7V is acceptable. The original LM2575T-5.0/LB03 operates from 4V minimum input. If your design requires operation below 7V input, LM2576TV-5G is not suitable. The higher 3A output current of LM2576TV-5G does not affect compatibility for 1A load applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. LM2575T-5.0/NOPB, LM2575T-5.0/LF03, and LM2576TV-5G are all ROHS3 compliant and REACH unaffected, matching the compliance status of the original LM2575T-5.0/LB03.

Q: Which substitute part has the best availability?

A: LM2575T-5.0/NOPB has the highest inventory at 10,200 pcs. LM2575T-5.0/LF03 has 2,476 pcs, and LM2576TV-5G has 1,900 pcs available.