LM2575TV-3.3 Equivalent & Substitute Parts

Part Overview

The LM2575TV-3.3 is a buck switching regulator IC from onsemi, delivering a fixed 3.3V output at 1A with input voltage range of 4.75V to 40V. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates at 52kHz switching frequency in a TO-220-5 through-hole package configuration.

Substiute Parts

LM2575TV-3.3

onsemiIn Stock: 5491LM2575TV-3.3 Datasheet

Current PartRFQ

LM2575TV-3.3G

onsemiIn Stock: 1037LM2575TV-3.3G Datasheet

DirectRFQ

LM2575HVT-3.3/LF03

Texas InstrumentsIn Stock: 955LM2575HVT-3.3/LF03 Datasheet

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TL2575HV-33IKV

Texas InstrumentsIn Stock: 2465TL2575HV-33IKV Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575TV-3.3 is determined by the following critical parameters: fixed 3.3V output voltage, 1A output current capability, buck topology, 52kHz switching frequency, TO-220-5 package, and operating temperature range of -40°C to 125°C. All identified substitutes maintain these core electrical and mechanical specifications, ensuring functional equivalence in applications designed for the original part.

The substitute parts are grouped into two categories:

Direct Equivalent (Same Manufacturer): LM2575TV-3.3G from onsemi maintains identical electrical specifications and package configuration, differing only in packaging format (tube) and RoHS compliance status.

Cross-Manufacturer Equivalents: LM2575HVT-3.3/LF03 and TL2575HV-33IKV from Texas Instruments provide equivalent functionality with identical output voltage, current, frequency, and package specifications. These parts feature extended input voltage ranges and active product status.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the LM2575TV-3.3, the following selection criteria apply:

Immediate Replacement (Same Manufacturer): LM2575TV-3.3G from onsemi provides direct functional equivalence with improved RoHS3 compliance. This part maintains identical electrical performance and package specifications while offering better regulatory alignment for new production.

Long-Term Production Support: LM2575HVT-3.3/LF03 and TL2575HV-33IKV from Texas Instruments are recommended for designs requiring sustained component availability. Both parts carry active product status, ensuring long-term supply continuity. These alternatives support extended input voltage ranges (up to 60V maximum), providing additional design margin in applications with variable input sources.

Compliance Considerations: All substitute parts achieve ROHS3 compliance, addressing regulatory requirements that the original LM2575TV-3.3 does not meet. Selection should account for existing design certifications and qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can LM2575TV-3.3G be used as a direct drop-in replacement for LM2575TV-3.3?

A: Yes. Both parts deliver identical electrical specifications: 3.3V fixed output, 1A current, 52kHz switching frequency, and -40°C to 125°C operating range. The TO-220-5 package pinout and lead configuration are identical, enabling direct PCB substitution. The primary difference is packaging format (tube) and RoHS3 compliance status of the substitute.

Q: What are the advantages of using Texas Instruments substitutes over the onsemi equivalent?

A: LM2575HVT-3.3/LF03 and TL2575HV-33IKV offer active product status, ensuring long-term availability and manufacturing support. Both parts support extended maximum input voltage (60V versus 40V), providing additional design margin. All three substitutes achieve ROHS3 compliance, addressing modern regulatory requirements.

Q: Are there any electrical performance differences between the main part and substitutes?

A: All parts maintain identical output voltage (3.3V), output current (1A), switching frequency (52kHz), and operating temperature range (-40°C to 125°C). Texas Instruments substitutes feature lower minimum input voltage (4V versus 4.75V) and higher maximum input voltage (60V versus 40V), expanding the usable input range without affecting core performance.

Q: Is the TO-220-5 package identical across all parts?

A: Yes. All four parts use TO-220-5 formed leads with identical pinout and mechanical dimensions, enabling direct PCB compatibility without layout modifications.

Q: Which substitute should be selected for new designs?

A: For new designs, LM2575HVT-3.3/LF03 or TL2575HV-33IKV are preferred due to active product status, ROHS3 compliance, and extended input voltage range. These parts provide superior long-term supply security and regulatory alignment compared to obsolete alternatives.