LM2597N-12 Equivalent & Substitute Parts

Part Overview

The LM2597N-12 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 12V output and 500mA current capacity. This component operates across a wide input voltage range of 4.5V to 40V and is housed in an 8-DIP package suitable for through-hole mounting applications.

The LM2597N-12 is classified as obsolete, which necessitates identification of equivalent substitute parts for new designs or component replenishment. Active alternatives with identical electrical and mechanical specifications are available to ensure design continuity and supply chain reliability.

Substiute Parts

LM2597N-12

Texas InstrumentsIn Stock: 3368LM2597N-12 Datasheet

Current PartRFQ

LM2597N-12/NOPB

Texas InstrumentsIn Stock: 1172LM2597N-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2597N-12 is determined by strict equivalence across the following critical parameters:

• Output voltage specification (12V fixed)
• Output current rating (500mA minimum)
• Input voltage operating range (4.5V to 40V)
• Package and pinout compatibility (8-DIP, 0.300" spacing)
• Switching topology (buck converter)
• Switching frequency (150kHz)
• Operating temperature range (-40°C to 125°C)

The LM2597N-12/NOPB qualifies as a direct substitute based on identical electrical performance and mechanical compatibility. The primary distinction is product status and packaging format, with the /NOPB variant representing the active production version supplied in tube packaging.

Parameter Comparison

Engineering Selection Recommendations

The LM2597N-12/NOPB is the direct substitute for the obsolete LM2597N-12. Both parts share identical electrical specifications and mechanical compatibility, ensuring drop-in replacement capability in existing circuit designs.

The LM2597N-12/NOPB offers the advantage of active product status, ensuring continued availability and supply chain support. Additionally, the /NOPB variant meets ROHS3 compliance requirements, making it suitable for applications subject to RoHS regulations. The original LM2597N-12 is RoHS non-compliant and should be replaced with the compliant variant for new designs or regulatory compliance requirements.

Both parts are supplied by Texas Instruments with identical performance characteristics across all critical electrical and thermal parameters. Selection between these variants should be based on regulatory compliance needs and supply availability.

Frequently Asked Questions (FAQ)

Q: Can the LM2597N-12/NOPB be used as a direct replacement for the LM2597N-12?

A: Yes. The LM2597N-12/NOPB is electrically and mechanically identical to the LM2597N-12. Both parts feature the same 12V output, 500mA current rating, input voltage range, switching frequency, and 8-DIP package configuration. No circuit modifications are required for substitution.

Q: What is the difference between LM2597N-12 and LM2597N-12/NOPB?

A: The primary differences are product status and RoHS compliance. The LM2597N-12 is obsolete and RoHS non-compliant, while the LM2597N-12/NOPB is an active product that meets ROHS3 compliance standards. The /NOPB variant is supplied in tube packaging. Electrical and mechanical specifications are identical.

Q: Are there any pinout differences between these parts?

A: No. Both the LM2597N-12 and LM2597N-12/NOPB use the same 8-DIP package with identical pinout and 0.300" (7.62mm) spacing. PCB layouts and socket compatibility are fully interchangeable.

Q: Which part should be selected for new designs?

A: The LM2597N-12/NOPB should be selected for new designs. It is the active production variant with ROHS3 compliance and ensures long-term supply availability and regulatory compliance.

Q: Does the packaging format affect electrical performance?

A: No. The tube packaging of the LM2597N-12/NOPB does not affect electrical performance or thermal characteristics. Packaging format is a logistics consideration only.