LM2574HVMX-ADJ Buck Switching Regulator IC

Part Overview

The LM2574HVMX-ADJ is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. This device delivers 500mA output current across an input voltage range of 4V to 60V, with adjustable output voltage from 1.23V to 37V at a 52kHz switching frequency.

The main part number LM2574HVMX-ADJ carries an obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with current manufacturing support and updated compliance certifications.

Substiute Parts

LM2574HVMX-ADJ

Texas InstrumentsIn Stock: 1583LM2574HVMX-ADJ Datasheet

Current PartRFQ

LM2574HVMX-ADJ/NOPB

Texas InstrumentsIn Stock: 1194LM2574HVMX-ADJ/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2574HVMX-ADJ is determined by strict equivalence across the following electrical and mechanical parameters:

• Functional topology: Buck (step-down) converter with positive adjustable output
• Output voltage range: 1.23V to 37V adjustable
• Input voltage range: 4V to 60V
• Output current capacity: 500mA
• Switching frequency: 52kHz
• Package specification: 14-SOIC (0.295", 7.50mm Width)
• Mounting type: Surface Mount
• Operating temperature range: -40°C ~ 125°C (TJ)

The substitute part LM2574HVMX-ADJ/NOPB maintains identical electrical specifications and mechanical compatibility while offering active product status and updated compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM2574HVMX-ADJ/NOPB is the direct equivalent substitute for the obsolete LM2574HVMX-ADJ. Both parts share identical electrical performance and mechanical compatibility, ensuring pin-for-pin and functional interchangeability in existing designs.

The substitute part offers the advantage of active product status, ensuring ongoing manufacturing support and availability. Additionally, LM2574HVMX-ADJ/NOPB meets ROHS3 compliance requirements, whereas the original part is RoHS non-compliant. This distinction is relevant for applications subject to RoHS regulatory requirements.

Both parts maintain equivalent REACH and ECCN classifications. The difference in Moisture Sensitivity Level (MSL 2A versus MSL 3) reflects updated handling specifications and does not affect electrical or thermal performance.

Frequently Asked Questions (FAQ)

Q: Are LM2574HVMX-ADJ and LM2574HVMX-ADJ/NOPB electrically identical?

A: Yes. Both parts deliver identical electrical performance across all specified parameters: 4V to 60V input range, 1.23V to 37V adjustable output, 500mA output current, and 52kHz switching frequency. They are functionally interchangeable in circuit design.

Q: Can I use LM2574HVMX-ADJ/NOPB as a direct replacement on existing PCBs designed for LM2574HVMX-ADJ?

A: Yes. Both parts use the 14-SOIC (0.295", 7.50mm Width) package with identical pinout and mounting type (Surface Mount). No PCB layout modifications are required.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" designation indicates the part is supplied without plumbum (lead-free), reflecting RoHS3 compliance. This is a packaging and compliance designation that does not affect electrical performance or pin compatibility.

Q: Why is the original LM2574HVMX-ADJ marked as obsolete?

A: Product obsolescence reflects Texas Instruments' manufacturing lifecycle decisions. The active substitute LM2574HVMX-ADJ/NOPB provides equivalent functionality with current manufacturing support and updated compliance certifications.

Q: Are there differences in handling or storage between these parts?

A: Both parts carry REACH Unaffected status and EAR99 ECCN classification. The Moisture Sensitivity Level differs (MSL 2A versus MSL 3), reflecting updated industry standards. Refer to component datasheets for specific storage and handling requirements.

Q: Can I mix LM2574HVMX-ADJ and LM2574HVMX-ADJ/NOPB in the same production batch?

A: Both parts are electrically and mechanically equivalent. However, mixing parts with different RoHS compliance statuses may create documentation and traceability complications in regulated manufacturing environments. Standardizing on a single part number is recommended for production consistency.