LM2575HVT-ADJ/LB03 Equivalent & Substitute Parts

Part Overview

The LM2575HVT-ADJ/LB03 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion applications. This positive adjustable output regulator delivers 1A continuous current with an input voltage range of 4V to 60V and adjustable output from 1.23V to 57V. The device operates at a fixed switching frequency of 52kHz and is housed in a TO-220-5 package with formed leads.

The LM2575HVT-ADJ/LB03 carries a Last Time Buy product status, indicating that Texas Instruments has discontinued this specific variant. Engineers and procurement teams require equivalent substitute parts to maintain design continuity and ensure long-term component availability for production and field service applications.

Substiute Parts

LM2575HVT-ADJ/LB03

Texas InstrumentsIn Stock: 1097LM2575HVT-ADJ/LB03 Datasheet

Current PartRFQ

LM2575HVT-ADJ/NOPB

Texas InstrumentsIn Stock: 22640LM2575HVT-ADJ/NOPB Datasheet

DirectRFQ

LM2575HVT-ADJ/LF03

Texas InstrumentsIn Stock: 2297LM2575HVT-ADJ/LF03 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2575HVT-ADJ/LB03 is determined by strict equivalence across the following critical parameters:

• Functional topology: Buck (step-down) switching regulator
• Output configuration: Positive adjustable output
• Electrical specifications: Input voltage 4V–60V, output 1.23V–57V, 1A output current
• Switching frequency: 52kHz fixed operation
• Package and pinout: TO-220-5 form factor with identical lead configuration
• Regulatory compliance: ROHS3 compliance and REACH unaffected status
• Thermal rating: -40°C to 125°C operating range

All substitute parts listed maintain identical electrical performance and mechanical compatibility, differing only in packaging variant designations and product lifecycle status. The base product number LM2575 remains constant across all variants.

Parameter Comparison

Engineering Selection Recommendations

LM2575HVT-ADJ/NOPB is the primary substitute for the LM2575HVT-ADJ/LB03. This variant carries Active product status from Texas Instruments, ensuring continued availability and long-term supply chain stability. The NOPB designation indicates standard plastic packaging without formed leads. All electrical and thermal specifications are identical to the main part. This variant is suitable for new designs and production applications requiring assured component availability.

LM2575HVT-ADJ/LF03 is the manufacturer-recommended alternative, also carrying Active product status. This variant features formed leads identical to the LM2575HVT-ADJ/LB03, providing mechanical compatibility for applications where lead forming is a design requirement. The LF03 packaging designation indicates this variant. This option is optimal for designs requiring exact mechanical interchangeability with the original part.

Both substitute parts maintain full ROHS3 compliance and REACH unaffected status, meeting all regulatory requirements applicable to the original component. Selection between LM2575HVT-ADJ/NOPB and LM2575HVT-ADJ/LF03 depends on mechanical lead configuration requirements for your specific application.

Frequently Asked Questions (FAQ)

Q: Can LM2575HVT-ADJ/NOPB and LM2575HVT-ADJ/LF03 be used interchangeably with LM2575HVT-ADJ/LB03?

A: Both parts are electrically and functionally identical to the LM2575HVT-ADJ/LB03. The primary difference is the lead configuration: NOPB uses standard plastic packaging, while LF03 features formed leads matching the original part. PCB layout compatibility depends on whether your design accommodates both lead styles.

Q: What does the Last Time Buy status mean for the LM2575HVT-ADJ/LB03?

A: Last Time Buy indicates Texas Instruments has discontinued this specific variant and will not manufacture additional units beyond existing inventory. Procurement should transition to LM2575HVT-ADJ/NOPB or LM2575HVT-ADJ/LF03 for future production needs.

Q: Are there any electrical performance differences between these three variants?

A: No. All three variants operate identically across input voltage range (4V–60V), adjustable output range (1.23V–57V), output current (1A), switching frequency (52kHz), and thermal specifications (-40°C to 125°C).

Q: Which substitute should I select for a new design?

A: LM2575HVT-ADJ/NOPB is recommended for new designs due to its Active product status and standard packaging. If your PCB layout specifically requires formed leads, select LM2575HVT-ADJ/LF03.

Q: Do these parts require different PCB footprints?

A: Both substitutes use the TO-220-5 package. LM2575HVT-ADJ/NOPB has standard leads, while LM2575HVT-ADJ/LF03 has pre-formed leads. Verify your PCB footprint design accommodates the lead style of your selected variant.

Q: Are all three parts ROHS3 compliant?

A: Yes. LM2575HVT-ADJ/LB03, LM2575HVT-ADJ/NOPB, and LM2575HVT-ADJ/LF03 are all ROHS3 compliant and REACH unaffected.