LM2575T-ADJ/LB03 Equivalent & Substitute Parts

Part Overview

The LM2575T-ADJ/LB03 is a buck switching regulator IC from Texas Instruments in the SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. This part is classified as Last Time Buy, indicating discontinued production. Finding equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring adjustable 1A buck regulation in TO-220-5 packaging.

Substiute Parts

LM2575T-ADJ/LB03

Texas InstrumentsIn Stock: 2155LM2575T-ADJ/LB03 Datasheet

Current PartRFQ

LM2575T-ADJ/NOPB

Texas InstrumentsIn Stock: 6780LM2575T-ADJ/NOPB Datasheet

DirectRFQ

LM2575T-ADJ/LF03

Texas InstrumentsIn Stock: 2468LM2575T-ADJ/LF03 Datasheet

MFR RecommendedRFQ

LM2575TV-ADJG

onsemiIn Stock: 3331LM2575TV-ADJG Datasheet

MFR RecommendedRFQ

LM2576TV-ADJG

onsemiIn Stock: 9704LM2576TV-ADJG Datasheet

MFR RecommendedRFQ

LM2596TVADJG

onsemiIn Stock: 5315LM2596TVADJG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2575T-ADJ/LB03 is determined by the following critical parameters:

• Input voltage range compatibility (minimum 4V)
• Output current capability (minimum 1A)
• Adjustable output voltage range (1.23V to 37V)
• TO-220-5 package form factor
• Buck topology for step-down conversion
• Operating temperature range (-40°C to 125°C)
• RoHS3 compliance

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical electrical specifications and packaging, differing only in manufacturing code or lead finish.

Functional Equivalents: Parts with enhanced specifications (higher current capability or additional topologies) that maintain full backward compatibility while offering additional design flexibility.

Parameter Comparison

Engineering Selection Recommendations

LM2575T-ADJ/NOPB (Texas Instruments): Direct equivalent with identical electrical specifications and Active product status. Recommended as primary replacement for LM2575T-ADJ/LB03. Higher inventory availability (6755 pcs) ensures supply continuity.

LM2575T-ADJ/LF03 (Texas Instruments): Direct equivalent with identical electrical specifications and Active product status. Differs only in lead finish (formed leads). Suitable for applications requiring specific lead configuration.

LM2575TV-ADJG (onsemi): Functional equivalent with identical 1A output current and adjustable topology. Minimum input voltage of 4.75V (versus 4V) represents minor specification difference. Active product status with 3312 pcs inventory.

LM2576TV-ADJG (onsemi): Enhanced substitute with 3A output current capability, supporting higher load applications. Minimum input voltage of 7V requires design verification for low-input applications. Active product status with highest inventory (9655 pcs).

LM2596TVADJG (onsemi): Multi-topology substitute supporting buck, boost, and buck-boost configurations. 3A output current and 150kHz switching frequency provide enhanced performance. Active product status with 5300 pcs inventory. Suitable for designs requiring topology flexibility.

Frequently Asked Questions (FAQ)

Q: Can LM2575T-ADJ/NOPB directly replace LM2575T-ADJ/LB03 without circuit modifications?

A: Yes. LM2575T-ADJ/NOPB is a direct equivalent with identical electrical specifications, output current (1A), input voltage range (4V to 40V), adjustable output range (1.23V to 37V), switching frequency (52kHz), and TO-220-5 packaging. No circuit modifications are required.

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

A: Both parts are electrically identical with the same 1A output current and adjustable specifications. The difference is in lead finish: LB03 uses tube packaging with standard leads, while LF03 uses formed leads. Selection depends on assembly process requirements.

Q: Can LM2576TV-ADJG be used as a drop-in replacement?

A: LM2576TV-ADJG is a functional equivalent with 3A output current (versus 1A) and identical adjustable output range. The primary difference is minimum input voltage of 7V (versus 4V). For applications operating above 7V input, it is a suitable replacement. For applications requiring 4V minimum input, design verification is necessary.

Q: What are the advantages of LM2596TVADJG over the LM2575T-ADJ/LB03?

A: LM2596TVADJG offers multi-topology capability (buck, boost, buck-boost), 3A output current, and 150kHz switching frequency. These enhancements provide design flexibility for applications requiring topology switching or higher current delivery. All parts maintain identical adjustable output range and TO-220-5 packaging.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (LM2575T-ADJ/NOPB, LM2575T-ADJ/LF03, LM2575TV-ADJG, LM2576TV-ADJG, and LM2596TVADJG) are ROHS3 compliant and REACH unaffected, matching the compliance status of LM2575T-ADJ/LB03.

Q: Which substitute part has the best inventory availability?

A: LM2576TV-ADJG has the highest inventory with 9655 pcs in stock. LM2575T-ADJ/NOPB follows with 6755 pcs. Both are suitable for immediate procurement.

Q: Can I use LM2575TV-ADJG if my application requires 4V minimum input voltage?

A: LM2575TV-ADJG specifies 4.75V minimum input voltage, which is higher than the LM2575T-ADJ/LB03 specification of 4V. For applications requiring operation at 4V input, LM2575T-ADJ/NOPB or LM2575T-ADJ/LF03 are recommended.