LM2674LD-ADJ Buck Switching Regulator IC

Part Overview

The LM2674LD-ADJ is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for positive adjustable step-down voltage regulation with a 500mA output current capability. This component operates across a wide input voltage range of 6.5V to 40V and provides adjustable output voltage from 1.2V to 37V, making it suitable for diverse power management applications.

The LM2674LD-ADJ is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this regulator.

Substiute Parts

LM2674LD-ADJ

Texas InstrumentsIn Stock: 1082LM2674LD-ADJ Datasheet

Current PartRFQ

LM2674LD-ADJ/NOPB

Texas InstrumentsIn Stock: 2213LM2674LD-ADJ/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2674LD-ADJ are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Function: Step-Down (Buck) topology
• Output Configuration: Positive
• Output Type: Adjustable
• Number of Outputs: 1
• Voltage - Input Range: 6.5V to 40V
• Voltage - Output Range: 1.2V to 37V
• Current - Output: 500mA
• Frequency - Switching: 260kHz
• Operating Temperature: -40°C ~ 125°C (TJ)
• Mounting Type: Surface Mount
• Package / Case: 16-WFDFN Exposed Pad
• Supplier Device Package: 16-WSON (5x5)

Parts meeting all these parameters are classified as direct substitutes. Variations in product status, packaging format (tape & reel vs. bulk), RoHS compliance, and moisture sensitivity level do not affect functional equivalence but may impact procurement and application requirements.

Parameter Comparison

Engineering Selection Recommendations

The LM2674LD-ADJ/NOPB is the direct functional equivalent of the LM2674LD-ADJ. Both parts share identical electrical specifications and mechanical packaging, ensuring pin-for-pin and functional compatibility.

Key Differentiation Factors:

The LM2674LD-ADJ/NOPB offers active product status, providing assured long-term availability and manufacturer support. This part is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and applications subject to RoHS directives.

The original LM2674LD-ADJ is obsolete and RoHS non-compliant. For applications requiring regulatory compliance or long-term supply chain stability, transition to the LM2674LD-ADJ/NOPB is appropriate.

The LM2674LD-ADJ/NOPB is supplied in Tape & Reel format, suitable for automated assembly processes. The MSL rating of 3 (168 Hours) requires standard moisture control during storage and handling, consistent with industry practices for surface-mount components.

Frequently Asked Questions (FAQ)

Q: Are the LM2674LD-ADJ and LM2674LD-ADJ/NOPB electrically identical?

A: Yes. Both parts are functionally equivalent with identical electrical specifications, including input voltage range (6.5V to 40V), adjustable output voltage (1.2V to 37V), output current (500mA), switching frequency (260kHz), and operating temperature range (-40°C to 125°C).

Q: What is the difference between these two part numbers?

A: The primary differences are product status, RoHS compliance, packaging format, and moisture sensitivity level. The LM2674LD-ADJ/NOPB is active, ROHS3 compliant, supplied in Tape & Reel format, and has an MSL rating of 3. The LM2674LD-ADJ is obsolete, RoHS non-compliant, and has an MSL rating of 1.

Q: Can I use LM2674LD-ADJ/NOPB as a direct replacement in existing designs?

A: Yes. The LM2674LD-ADJ/NOPB is a direct pin-for-pin and functional replacement. No circuit modifications are required. The identical package (16-WSON 5x5) and pinout ensure compatibility with existing PCB layouts and designs.

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

A: The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free), meeting RoHS3 compliance requirements. This designation reflects the manufacturing process and environmental compliance status.

Q: Are there any handling differences due to MSL ratings?

A: The LM2674LD-ADJ/NOPB has an MSL rating of 3 (168 Hours), requiring standard moisture control during storage and handling. Components must be stored in dry conditions and handled according to industry moisture sensitivity guidelines. The LM2674LD-ADJ has an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Is the LM2674LD-ADJ still available for purchase?

A: The LM2674LD-ADJ is classified as obsolete. The LM2674LD-ADJ/NOPB is the active equivalent with confirmed inventory availability and ongoing manufacturer support.