LM2597M-5.0 Equivalent & Substitute Parts

Part Overview

The LM2597M-5.0 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 5V output. This component delivers 500mA output current and operates across a wide input voltage range of 4.5V to 40V, making it suitable for diverse power management applications requiring regulated 5V rails.

The LM2597M-5.0 carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identifying equivalent substitute parts to ensure design continuity and supply chain reliability for new projects or ongoing production requirements.

Substiute Parts

LM2597M-5.0

Texas InstrumentsIn Stock: 2376LM2597M-5.0 Datasheet

Current PartRFQ

LM2597M-5.0/NOPB

Texas InstrumentsIn Stock: 2226LM2597M-5.0/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2597M-5.0 is determined by strict equivalence across the following critical parameters:

• Output Voltage: Must be fixed at 5V
• Output Current Capability: Must be rated for 500mA minimum
• Input Voltage Range: Must support 4.5V to 40V operation
• Switching Frequency: Must operate at 150kHz
• Package Type: Must be 8-SOIC (0.154", 3.90mm Width)
• Topology: Must be buck (step-down) configuration
• Temperature Range: Must support -40°C to 125°C (TJ)
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

Only parts meeting all these criteria are considered direct electrical and mechanical equivalents. The LM2597M-5.0/NOPB variant qualifies as a manufacturer-recommended substitute based on identical electrical specifications and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The LM2597M-5.0/NOPB is the direct manufacturer-recommended substitute for the LM2597M-5.0. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the original LM2597M-5.0 is designated Last Time Buy, while the LM2597M-5.0/NOPB maintains Active status.

For new designs or ongoing production, the LM2597M-5.0/NOPB is the appropriate selection due to its active product status and assured long-term availability. Both variants maintain full ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: What does the "/NOPB" suffix indicate in the LM2597M-5.0/NOPB part number?

A: The "/NOPB" suffix denotes "No Plumbum" (lead-free) packaging, indicating compliance with lead-free soldering requirements. This is a packaging designation variant of the base LM2597M-5.0 part and does not affect electrical performance or functional specifications.

Q: Can the LM2597M-5.0/NOPB be used as a direct replacement in existing designs using LM2597M-5.0?

A: Yes. The LM2597M-5.0/NOPB is electrically and mechanically identical to the LM2597M-5.0. Both parts operate at 5V fixed output, 500mA current, 150kHz switching frequency, and use the same 8-SOIC package. No circuit modifications or PCB layout changes are required.

Q: Why is the LM2597M-5.0 marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued active production of this specific part number variant. The LM2597M-5.0/NOPB remains in active production and serves as the recommended alternative for continued supply assurance.

Q: Are there any differences in thermal performance between these two part numbers?

A: No. Both parts operate across the identical temperature range of -40°C to 125°C (TJ) and share the same thermal characteristics. The 8-SOIC package and die specifications are equivalent.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity rating?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component can be stored indefinitely without moisture bake-out requirements prior to soldering. This simplifies inventory management and reduces handling constraints compared to higher MSL ratings.