LM2575HVT-12/LB03 Equivalent & Substitute Parts

Part Overview

The LM2575HVT-12/LB03 is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. This positive fixed 12V output device delivers 1A in a TO-220-5 package with formed leads. The part is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for design continuity and procurement planning. Alternative models with identical or compatible electrical and mechanical specifications ensure uninterrupted supply chain access.

Substiute Parts

LM2575HVT-12/LB03

Texas InstrumentsIn Stock: 2223LM2575HVT-12/LB03 Datasheet

Current PartRFQ

LM2575HVT-12/NOPB

Texas InstrumentsIn Stock: 4373LM2575HVT-12/NOPB Datasheet

DirectRFQ

LM2575HVT-12/LF03

National SemiconductorIn Stock: 3694LM2575HVT-12/LF03 Datasheet

MFR RecommendedRFQ

LM2575TV-012G

onsemiIn Stock: 1251LM2575TV-012G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575HVT-12/LB03 is determined by the following critical parameters:

• Output Voltage: Must be fixed at 12V
• Output Current: Must be rated at 1A
• Topology: Must be buck (step-down) configuration
• Package: Must be TO-220-5 with formed leads for mechanical compatibility
• Switching Frequency: Must be 52kHz
• Input Voltage Range: Minimum 4V, maximum 40V or higher
• Operating Temperature: Must support -40°C to 125°C range
• Mounting Type: Through hole only

Substitute parts are grouped into two categories: direct equivalents (identical specifications) and manufacturer-recommended alternatives (compatible within specified parameters).

Parameter Comparison

Engineering Selection Recommendations

LM2575HVT-12/NOPB is the primary direct substitute. This Texas Instruments part maintains identical electrical specifications and is in Active product status, ensuring long-term availability and supply chain stability. The TO-220-5 package and ROHS3 compliance match the original specification.

LM2575HVT-12/LF03 is a manufacturer-recommended alternative from National Semiconductor with identical electrical parameters. This part is Active and suitable for applications where bulk packaging is acceptable. Compliance documentation should be verified for specific regulatory requirements.

LM2575TV-012G from onsemi is not recommended for new designs. This part is Obsolete and has a reduced maximum input voltage specification (40V versus 60V), limiting its applicability to designs requiring the full 60V input range of the original part.

Frequently Asked Questions (FAQ)

Q: Can LM2575HVT-12/NOPB be used as a direct replacement for LM2575HVT-12/LB03?

A: Yes. Both parts are Texas Instruments products with identical electrical specifications, output voltage, current rating, switching frequency, and operating temperature range. The primary difference is product status (Active versus Last Time Buy) and packaging format (Tube for both). Mechanical and electrical compatibility is complete.

Q: What is the difference between LM2575HVT-12/LB03 and LM2575HVT-12/LF03?

A: The electrical specifications are identical. The primary differences are manufacturer (Texas Instruments versus National Semiconductor) and packaging format (Tube versus Bulk). Both support the full 4V to 60V input range and deliver 12V at 1A. Verify compliance documentation for your specific application requirements.

Q: Why is LM2575TV-012G not recommended as a substitute?

A: While LM2575TV-012G shares the same output voltage, current, and package type, it has a reduced maximum input voltage specification of 40V compared to the 60V maximum of the original part. This limitation makes it unsuitable for applications requiring the full input voltage range. Additionally, the part is Obsolete, limiting future availability.

Q: Are all substitute parts available in the same TO-220-5 package?

A: Yes. All listed substitute parts use the TO-220-5 package with formed leads, ensuring mechanical compatibility with existing PCB designs and thermal management requirements.

Q: What compliance certifications apply to these substitute parts?

A: LM2575HVT-12/LB03, LM2575HVT-12/NOPB, and LM2575TV-012G are ROHS3 compliant. All parts are REACH Unaffected and classified as EAR99 for export control purposes. Compliance status for LM2575HVT-12/LF03 should be confirmed with the supplier.