LM2597M-12 Equivalent & Substitute Parts

Part Overview

The LM2597M-12 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 12V output. This component delivers 500mA output current and operates across a wide input voltage range of 4.5V to 40V, making it suitable for various power management applications requiring regulated 12V rails.

The LM2597M-12 is classified as obsolete. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing status and current compliance certifications.

Substiute Parts

LM2597M-12

Texas InstrumentsIn Stock: 1960LM2597M-12 Datasheet

Current PartRFQ

LM2597M-12/NOPB

Texas InstrumentsIn Stock: 1165LM2597M-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2597M-12 is determined by strict equivalence across the following critical parameters:

• Output Voltage: Fixed 12V output is mandatory
• Output Current Capability: Minimum 500mA required
• Input Voltage Range: 4.5V to 40V compatibility required
• Topology: Buck (step-down) configuration required
• Package: 8-SOIC form factor required for PCB compatibility
• Switching Frequency: 150kHz operation required
• Temperature Range: -40°C to 125°C (TJ) required

The LM2597M-12/NOPB qualifies as a direct substitute because it maintains identical electrical specifications and package configuration while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM2597M-12/NOPB is the direct substitute for the obsolete LM2597M-12. Both components share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility without circuit redesign.

The LM2597M-12/NOPB offers the following advantages:

• Active Product Status: Currently manufactured and supported by Texas Instruments, ensuring long-term availability and supply chain stability
• ROHS3 Compliance: Meets current environmental and regulatory requirements, whereas the original part is RoHS non-compliant
• Tube Packaging: Supplied in tube format, facilitating automated assembly and inventory management

Selection of the LM2597M-12/NOPB is recommended for new designs and production continuity of existing applications using the LM2597M-12.

Frequently Asked Questions (FAQ)

Q: Can the LM2597M-12/NOPB be used as a direct replacement for the LM2597M-12?

A: Yes. The LM2597M-12/NOPB is electrically and mechanically identical to the LM2597M-12. Both components feature the same 12V fixed output, 500mA current rating, 4.5V to 40V input range, 150kHz switching frequency, and 8-SOIC package. No circuit modifications are required.

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

A: The "/NOPB" suffix designates "No Plumbum" (lead-free) packaging and indicates ROHS3 compliance. This reflects the component's adherence to current environmental regulations and restriction of hazardous substances directives.

Q: Why is the original LM2597M-12 marked as obsolete?

A: The LM2597M-12 is obsolete due to its RoHS non-compliant status. Texas Instruments transitioned to the LM2597M-12/NOPB variant to meet modern regulatory requirements and environmental standards.

Q: Are there any differences in electrical performance between these parts?

A: No. Both the LM2597M-12 and LM2597M-12/NOPB deliver identical electrical performance across all specified parameters, including output voltage, current capability, input voltage range, switching frequency, and operating temperature range.

Q: What packaging formats are available?

A: The LM2597M-12 packaging format is not specified in available documentation. The LM2597M-12/NOPB is supplied in tube packaging, which is standard for surface-mount components and compatible with automated assembly processes.

Q: Can this component operate across the full -40°C to 125°C temperature range?

A: Yes. Both the LM2597M-12 and LM2597M-12/NOPB are rated for continuous operation across the -40°C to 125°C junction temperature range, supporting applications in industrial, automotive, and extended-temperature environments.