LM2574HVM-3.3 Equivalent & Substitute Parts

Part Overview

The LM2574HVM-3.3 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 3.3V output and 500mA current capacity. The device operates across a wide input voltage range of 4V to 60V and features a 52kHz switching frequency in a 14-SOIC surface mount package.

The LM2574HVM-3.3 carries an obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM2574HVM-3.3

Texas InstrumentsIn Stock: 4141LM2574HVM-3.3 Datasheet

Current PartRFQ

LM2574HVM-3.3/NOPB

Texas InstrumentsIn Stock: 2531LM2574HVM-3.3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2574HVM-3.3 is determined by strict equivalence across the following critical parameters:

• Output voltage configuration: Fixed 3.3V
• Output current rating: 500mA minimum
• Input voltage range: 4V to 60V
• Switching topology: Buck converter
• Package: 14-SOIC (0.295", 7.50mm Width)
• Mounting: Surface mount
• Operating temperature range: -40°C to 125°C

Only parts meeting all these specifications qualify as direct substitutes. Variations in any parameter disqualify a part from this equivalence group.

Parameter Comparison

Engineering Selection Recommendations

The LM2574HVM-3.3/NOPB is the direct substitute for the obsolete LM2574HVM-3.3. Both parts are manufactured by Texas Instruments and share identical electrical specifications and package configuration.

The primary distinction is product status: LM2574HVM-3.3/NOPB maintains active manufacturing status, ensuring ongoing availability and supply chain support. Additionally, LM2574HVM-3.3/NOPB carries ROHS3 compliance certification, whereas the original part is RoHS non-compliant. The MSL rating differs (3 versus 2A), reflecting updated moisture handling specifications for the active variant.

For new designs or production requiring current compliance certifications and guaranteed supply continuity, LM2574HVM-3.3/NOPB is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can LM2574HVM-3.3/NOPB be used as a direct replacement for LM2574HVM-3.3?

A: Yes. Both parts are electrically and mechanically identical across all functional parameters: 3.3V fixed output, 500mA current capacity, 4V to 60V input range, 52kHz switching frequency, and 14-SOIC package. The /NOPB variant is the active production equivalent.

Q: What does the "/NOPB" suffix indicate?

A: The /NOPB designation indicates "No Plumbum" (lead-free) packaging and is associated with the active product status and updated compliance certifications of this variant.

Q: Are there differences in PCB layout or circuit design requirements between these parts?

A: No. Both parts use identical pinouts, package dimensions, and electrical characteristics. Existing PCB designs and application circuits require no modification for substitution.

Q: Why is the original LM2574HVM-3.3 marked obsolete?

A: Texas Instruments transitioned this product line to the active LM2574HVM-3.3/NOPB variant, which incorporates updated compliance standards and manufacturing processes.

Q: What is the significance of the RoHS compliance difference?

A: The LM2574HVM-3.3/NOPB meets ROHS3 compliance requirements, restricting hazardous substances in electronic equipment. The original part predates these regulations. For applications subject to RoHS requirements, the /NOPB variant is mandatory.

Q: How do the MSL ratings differ, and does this affect usage?

A: MSL 2A (4 Weeks) versus MSL 3 (168 Hours) reflects different moisture sensitivity classifications. MSL 3 allows extended shelf life before soldering. For standard manufacturing environments with proper moisture control, both ratings are compatible with typical assembly processes.