LM2575WU-TR Equivalent & Substitute Parts

Part Overview

The LM2575WU-TR is a buck switching regulator IC manufactured by Microchip Technology, classified as a positive adjustable step-down converter with 1A output capacity. This device operates across an input voltage range of 4V to 40V and delivers adjustable output voltage from 1.23V to 37V at 52kHz switching frequency. The part is mounted in a TO-263-6 D2PAK package with 5 leads plus tab and is currently active in production status with 700 pieces in stock inventory.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or when enhanced performance specifications align with application needs while maintaining functional compatibility within the same package and electrical parameter envelope.

Substiute Parts

LM2575WU-TR

Microchip TechnologyIn Stock: 776LM2575WU-TR Datasheet

Current PartRFQ

LM2596DSADJR4G

onsemiIn Stock: 19062LM2596DSADJR4G Datasheet

MFR RecommendedRFQ

TL2575-ADJIKTTR

Texas InstrumentsIn Stock: 1414TL2575-ADJIKTTR Datasheet

MFR RecommendedRFQ

TL2575HV-ADJIKTTR

Texas InstrumentsIn Stock: 1404TL2575HV-ADJIKTTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2575WU-TR are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

• Function: Step-Down (Buck) topology
• Output Configuration: Positive adjustable output
• Package: TO-263-6 D2PAK (5 Leads + Tab)
• Mounting Type: Surface Mount
• Output Voltage Range: Minimum 1.23V, Maximum ≥37V
• Input Voltage Range: Minimum ≤4V, Maximum ≥40V
• Operating Temperature: -40°C ~ 125°C (TJ)
• RoHS Compliance: ROHS3 Compliant

Substitution Categories:

Category 1: Direct Functional Equivalents (Same Output Current) Parts maintaining 1A output current with identical buck topology and adjustable positive output configuration. These parts operate at the same switching frequency (52kHz) and share identical voltage specifications.

Category 2: Enhanced Performance Substitutes (Higher Output Current) Parts with increased output current capacity (3A) while maintaining buck topology, adjustable positive output, and compatible voltage ranges. These parts provide design margin and are suitable for applications where the 1A specification represents a design constraint rather than a requirement.

Category 3: Extended Voltage Range Substitutes Parts with expanded maximum input or output voltage ratings while maintaining all other critical parameters. These parts accommodate applications requiring operation beyond the standard 40V input or 37V output maximum.

All substitute parts listed maintain active production status, ROHS3 compliance, and surface mount packaging in the TO-263-6 D2PAK format.

Parameter Comparison

Engineering Selection Recommendations

LM2596DSADJR4G (onsemi)

This part is suitable as a substitute when higher output current capacity is required. The LM2596DSADJR4G provides 3A output current compared to the 1A specification of the LM2575WU-TR, while maintaining identical input and output voltage ranges (4.5V to 40V input, 1.23V to 37V output). The switching frequency increases to 150kHz, which reduces output filter component size. The part supports multiple topologies (buck, boost, buck-boost) and output configurations (positive or negative), providing design flexibility beyond the basic buck positive configuration. All parts maintain ROHS3 compliance and active production status. Moisture sensitivity level improves to MSL 1 (Unlimited) compared to MSL 3 (168 Hours) for the original part.

TL2575-ADJIKTTR (Texas Instruments)

This part provides direct functional equivalence to the LM2575WU-TR with identical 1A output current, 52kHz switching frequency, and buck topology. The minimum input voltage specification increases to 4.75V (compared to 4V for the original), and output voltage specifications remain identical (1.23V to 37V). The part is available in Cut Tape and Digi-Reel packaging. ROHS3 compliance and active production status are maintained. This substitute is appropriate for applications where the 4.75V minimum input voltage does not present a constraint.

TL2575HV-ADJIKTTR (Texas Instruments)

This part extends the maximum input and output voltage ratings to 60V and 57V respectively, compared to 40V and 37V for the LM2575WU-TR. All other specifications remain identical: 1A output current, 52kHz switching frequency, buck topology, and adjustable positive output. The minimum input voltage is 4.75V. This substitute is appropriate for applications requiring operation at higher input or output voltages while maintaining the same output current capacity. ROHS3 compliance and active production status are maintained.

All substitute parts are manufactured by established semiconductor suppliers (onsemi, Texas Instruments) with active production status and full ROHS3 compliance, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the LM2596DSADJR4G replace the LM2575WU-TR in all applications?

A: The LM2596DSADJR4G is electrically compatible with the LM2575WU-TR for applications operating within the 4.5V to 40V input range and 1.23V to 37V output range. The higher 3A output current capacity and 150kHz switching frequency are backward compatible with designs requiring 1A or less. The part shares the identical TO-263-6 D2PAK package. However, the increased switching frequency may require PCB layout optimization to minimize EMI. The LM2596DSADJR4G supports multiple topologies (buck, boost, buck-boost) and output configurations (positive or negative), which do not affect buck positive operation but provide additional design flexibility.

Q: What is the difference between TL2575-ADJIKTTR and TL2575HV-ADJIKTTR?

A: Both parts are Texas Instruments buck regulators with identical 1A output current and 52kHz switching frequency. The primary difference is the maximum voltage rating: TL2575-ADJIKTTR operates up to 40V input and 37V output, while TL2575HV-ADJIKTTR extends these limits to 60V input and 57V output. The "HV" designation indicates high-voltage capability. Both parts maintain the same minimum input voltage of 4.75V and identical adjustable output range starting at 1.23V. Selection between these parts depends on whether the application requires operation above 40V input or 37V output.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts are available in the TO-263-6 D2PAK (5 Leads + Tab) surface mount package, which is mechanically and electrically compatible with the LM2575WU-TR. Packaging options differ by supplier: LM2575WU-TR is supplied in Tape & Reel (TR), LM2596DSADJR4G is available in Cut Tape (CT) and Digi-Reel, and TL2575-ADJIKTTR and TL2575HV-ADJIKTTR are available in Cut Tape and Tape & Reel formats. These packaging variations do not affect electrical performance or PCB assembly compatibility.

Q: Do all substitute parts meet the same compliance standards?

A: All substitute parts listed are ROHS3 compliant and maintain active production status. REACH compliance status is consistent across all parts (REACH Unaffected). The moisture sensitivity level (MSL) varies: LM2575WU-TR, TL2575-ADJIKTTR, and TL2575HV-ADJIKTTR are rated MSL 3 (168 Hours), while LM2596DSADJR4G is rated MSL 1 (Unlimited). All parts operate across the identical temperature range of -40°C to 125°C junction temperature.

Q: What switching frequency differences exist among the substitute parts?

A: The LM2575WU-TR, TL2575-ADJIKTTR, and TL2575HV-ADJIKTTR all operate at 52kHz switching frequency. The LM2596DSADJR4G operates at 150kHz. Higher switching frequency reduces the size of output filter inductors and capacitors but may increase switching losses and EMI. The 150kHz frequency of the LM2596DSADJR4G is compatible with applications designed for 52kHz operation, as the higher frequency provides improved transient response and smaller component footprints.

Q: Which substitute part should be selected for maximum design margin?

A: The LM2596DSADJR4G provides the highest output current capacity at 3A, offering the greatest design margin for applications where load current may approach or exceed 1A. The TL2575HV-ADJIKTTR provides the highest voltage ratings at 60V input and 57V output, offering maximum design margin for high-voltage applications. Selection depends on whether the design constraint is output current capacity or voltage rating.