LM2575HVT-3.3/LF03 Equivalent & Substitute Parts

Part Overview

The LM2575HVT-3.3/LF03 is a buck switching regulator IC manufactured by Texas Instruments, designed for step-down voltage conversion with a fixed 3.3V output and 1A current capacity. This component operates across a wide input voltage range of 4V to 60V, making it suitable for diverse power management applications. The part is currently in active production status with 904 units in stock.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within alternative electrical specifications. The LM2575HVT-3.3/LF03 has documented substitute options that maintain functional compatibility while potentially offering different input voltage ranges or output current ratings.

Substiute Parts

LM2575HVT-3.3/LF03

Texas InstrumentsIn Stock: 955LM2575HVT-3.3/LF03 Datasheet

Current PartRFQ

LM2575TV-3.3G

onsemiIn Stock: 1037LM2575TV-3.3G Datasheet

MFR RecommendedRFQ

LM2576TV-3.3G

onsemiIn Stock: 1008LM2576TV-3.3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575HVT-3.3/LF03 is determined by the following critical parameters:

• Package Compatibility: All substitute parts must use TO-220-5 Formed Leads packaging to ensure mechanical and electrical pin compatibility
• Output Voltage: Fixed 3.3V output is mandatory for direct substitution
• Switching Frequency: 52kHz operation ensures compatibility with existing circuit designs
• Output Current Rating: Substitutes with equal or higher current ratings (1A minimum) are acceptable
• Input Voltage Range: The primary part accepts 4V to 60V; substitutes with narrower input ranges remain compatible if the application operates within their specified limits
• Temperature Range: -40°C to 125°C operating range must be maintained
• Compliance: RoHS3 compliance and REACH unaffected status are required

The identified substitute parts—LM2575TV-3.3G and LM2576TV-3.3G—meet these core criteria while differing in input voltage specifications and current ratings.

Parameter Comparison

Engineering Selection Recommendations

LM2575TV-3.3G (onsemi): This substitute maintains electrical and mechanical compatibility with the primary part. The input voltage minimum increases from 4V to 4.75V, and the maximum decreases from 60V to 40V. Applications operating within the 4.75V to 40V input range experience no functional limitation. The part is obsolete, indicating limited future availability. Current inventory shows 1,026 units in stock. RoHS3 compliance and REACH unaffected status are maintained.

LM2576TV-3.3G (onsemi): This substitute provides higher output current capacity (3A versus 1A), offering design margin for applications requiring increased current delivery. The input voltage range narrows to 7V to 40V. Applications requiring operation below 7V input voltage cannot use this substitute. The part is obsolete with 923 units currently in stock. RoHS3 compliance and REACH unaffected status are maintained. The higher current rating makes this suitable for designs where the primary part's 1A limit is marginal.

Selection between substitutes depends on application input voltage requirements and current demands. The primary part remains the preferred choice due to active production status and widest input voltage range.

Frequently Asked Questions (FAQ)

Q: Can LM2575TV-3.3G replace LM2575HVT-3.3/LF03 in all applications?

A: LM2575TV-3.3G is compatible when the application input voltage remains between 4.75V and 40V. Applications requiring operation below 4.75V input voltage require the primary part or alternative solutions. Both parts deliver identical 3.3V output at 1A with TO-220-5 packaging.

Q: What is the primary difference between LM2575TV-3.3G and LM2576TV-3.3G?

A: The LM2576TV-3.3G provides 3A output current compared to 1A in the LM2575TV-3.3G. The LM2576TV-3.3G also requires minimum 7V input voltage versus 4.75V for the LM2575TV-3.3G. Both maintain 52kHz switching frequency and TO-220-5 packaging.

Q: Are substitute parts pin-compatible with the primary part?

A: Yes. All three parts use TO-220-5 Formed Leads packaging with identical pin configuration, enabling direct mechanical and electrical substitution without PCB redesign.

Q: What is the significance of product status differences?

A: The primary part (LM2575HVT-3.3/LF03) is in active production, ensuring long-term availability and supply continuity. Both substitute parts are obsolete, indicating no new production and potential future supply constraints. Current inventory levels do not guarantee future availability.

Q: Do substitute parts maintain regulatory compliance?

A: Yes. Both LM2575TV-3.3G and LM2576TV-3.3G are ROHS3 compliant and REACH unaffected, matching the primary part's compliance status.

Q: Which substitute should be selected for wide input voltage applications?

A: LM2575TV-3.3G supports the wider input range (4.75V to 40V) compared to LM2576TV-3.3G (7V to 40V). For applications requiring operation below 7V input, LM2575TV-3.3G is the appropriate substitute. For applications below 4.75V, the primary part is required.