LM2575T-5.0/LF02 Equivalent & Substitute Parts

Part Overview

The LM2575T-5.0/LF02 is a buck switching regulator IC from Texas Instruments, designed for step-down voltage conversion with a fixed 5V output and 1A current capacity. This component operates across a wide input voltage range of 4V to 40V and features a 52kHz switching frequency in a TO-220-5 through-hole package. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

LM2575T-5.0/LF02

Texas InstrumentsIn Stock: 934LM2575T-5.0/LF02 Datasheet

Current PartRFQ

LM2576-5.0WT

Microchip TechnologyIn Stock: 2853LM2576-5.0WT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2575T-5.0/LF02 is determined by the following critical parameters:

• Output Voltage: Fixed 5V output is mandatory
• Topology: Buck (step-down) switching regulator topology
• Input Voltage Range: 4V to 40V compatibility
• Switching Frequency: 52kHz operation
• Package: TO-220-5 through-hole mounting
• Output Configuration: Positive fixed output, single output
• Operating Temperature Range: -40°C to 125°C (TJ)
• Synchronous Rectifier: Non-synchronous design
• Compliance: ROHS3 compliant, REACH unaffected

The LM2576-5.0WT qualifies as a substitute based on matching all critical electrical and mechanical parameters. While the substitute offers higher current capacity (3A versus 1A), this represents an enhancement that maintains full backward compatibility with the original design requirements.

Parameter Comparison

Engineering Selection Recommendations

The LM2576-5.0WT from Microchip Technology is a direct substitute for the obsolete LM2575T-5.0/LF02. Both components share identical electrical specifications for input voltage range, output voltage, switching frequency, and operating temperature. The substitute maintains ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

The primary distinction is the active product status of the LM2576-5.0WT, which provides long-term availability and supply chain stability compared to the obsolete original part. The increased current rating (3A versus 1A) does not compromise compatibility and provides design margin for applications requiring the original 1A specification.

Frequently Asked Questions (FAQ)

Q: Can the LM2576-5.0WT directly replace the LM2575T-5.0/LF02 in existing designs?

A: Yes. Both components operate at identical input voltage ranges (4V to 40V), produce fixed 5V outputs, and share the same 52kHz switching frequency and TO-220-5 package. The higher current capacity of the substitute does not affect compatibility with designs rated for 1A operation.

Q: Are there any package differences between these parts?

A: Both use TO-220-5 through-hole packages. The original specifies "Formed Leads" while the substitute uses standard TO-220-5 packaging. Both are compatible with identical PCB footprints and mounting procedures.

Q: What is the significance of the product status change from Obsolete to Active?

A: The LM2576-5.0WT is actively manufactured and supported by Microchip Technology, ensuring continued availability, technical documentation, and supply chain access. The obsolete status of the original part indicates it is no longer produced by Texas Instruments.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both components are ROHS3 compliant and REACH unaffected, meeting identical regulatory standards for hazardous substance restrictions and environmental compliance.

Q: Is the higher current rating of the LM2576-5.0WT a concern for 1A applications?

A: No. The 3A rating of the substitute represents maximum available output current. Applications designed for 1A operation will draw only the required current, with no adverse effects from the higher rating.