LM2574DW-ADJR2 Equivalent & Substitute Parts

Part Overview

The LM2574DW-ADJR2 is a Buck, Boost, Buck-Boost Switching Regulator IC from onsemi, configured for positive or negative adjustable output at 1.23V with 500mA output capability in a 16-SOIC surface mount package. The main part is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and production continuity. Equivalent parts maintain identical electrical and mechanical specifications while offering improved availability or compliance status.

Substiute Parts

LM2574DW-ADJR2

onsemiIn Stock: 3392LM2574DW-ADJR2 Datasheet

Current PartRFQ

LM2574DW-ADJR2G

onsemiIn Stock: 2966LM2574DW-ADJR2G Datasheet

DirectRFQ

NCV2574DW-ADJR2G

onsemiIn Stock: 882NCV2574DW-ADJR2G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2574DW-ADJR2 is determined by strict equivalence across the following critical parameters:

• Topology: Buck, Boost, Buck-Boost capability
• Output Configuration: Positive or Negative adjustable
• Voltage Input Range: 4.75V to 40V
• Voltage Output Range: 1.23V to 37V
• Output Current: 500mA
• Switching Frequency: 52kHz
• Package: 16-SOIC (0.295", 7.50mm Width)
• Operating Temperature: -40°C to 125°C

Two substitute parts meet these criteria: LM2574DW-ADJR2G (direct manufacturer equivalent with improved compliance status) and NCV2574DW-ADJR2G (parametric equivalent from the NCV2574 base product line).

Parameter Comparison

Engineering Selection Recommendations

For new designs and production continuity, LM2574DW-ADJR2G is the primary substitute. This part maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance, eliminating obsolescence risk and meeting modern regulatory requirements.

NCV2574DW-ADJR2G provides a parametric equivalent option from the NCV2574 base product line. While electrically and mechanically identical, this part carries obsolete status and should be selected only when LM2574DW-ADJR2G availability is constrained. Both substitutes are qualified onsemi products within the same product family.

Moisture sensitivity level increases from MSL 1 (unlimited) to MSL 3 (168 hours) for both substitutes. Storage and handling procedures must account for this change in moisture sensitivity classification.

Frequently Asked Questions (FAQ)

Q: Can LM2574DW-ADJR2G be used as a direct replacement for LM2574DW-ADJR2?

A: Yes. LM2574DW-ADJR2G maintains identical electrical performance, output specifications, and 16-SOIC package configuration. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Pin-for-pin compatibility is confirmed.

Q: What is the difference between LM2574DW-ADJR2G and NCV2574DW-ADJR2G?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The distinction lies in the base product line designation (LM2574 vs. NCV2574). LM2574DW-ADJR2G is the preferred substitute due to active product status. NCV2574DW-ADJR2G is an alternative when primary availability is limited.

Q: Does the increased moisture sensitivity level (MSL 3) affect circuit performance?

A: Moisture sensitivity level affects component storage and handling procedures, not circuit performance. MSL 3 (168 hours) requires controlled storage conditions and bake-out procedures before reflow soldering. Consult onsemi datasheets for specific handling requirements.

Q: Are there any compliance differences between the main part and substitutes?

A: Yes. The original LM2574DW-ADJR2 is RoHS non-compliant. Both substitutes (LM2574DW-ADJR2G and NCV2574DW-ADJR2G) are ROHS3 compliant. All three parts maintain identical REACH and ECCN classifications.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All three parts share the 16-SOIC (0.295", 7.50mm Width) package with identical pinout. No PCB layout modifications are required for substitution.