LM2597M-3.3 Equivalent & Substitute Parts

Part Overview

The LM2597M-3.3 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 3.3V 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-SOIC surface mount package.

The LM2597M-3.3 carries an obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM2597M-3.3

Texas InstrumentsIn Stock: 3690LM2597M-3.3 Datasheet

Current PartRFQ

LM2597M-3.3/NOPB

Texas InstrumentsIn Stock: 2099LM2597M-3.3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2597M-3.3 is determined by strict equivalence across the following critical parameters:

• Output voltage configuration: Fixed 3.3V
• Output current rating: 500mA minimum
• Input voltage range: 4.5V to 40V
• Topology: Buck (step-down)
• Package: 8-SOIC (0.154", 3.90mm Width)
• Switching frequency: 150kHz
• Operating temperature range: -40°C to 125°C

Only parts meeting all these specifications qualify as direct substitutes. The LM2597M-3.3/NOPB variant satisfies all substitution criteria while offering improved product status and compliance standing.

Parameter Comparison

Engineering Selection Recommendations

The LM2597M-3.3/NOPB is the direct substitute for the obsolete LM2597M-3.3. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all critical parameters.

The LM2597M-3.3/NOPB offers two significant advantages:

• Active product status ensures ongoing manufacturing support and supply chain availability
• ROHS3 compliance meets current environmental and regulatory requirements, whereas the original part carries RoHS non-compliant status

For new designs or component replenishment, the LM2597M-3.3/NOPB is the appropriate selection. For legacy systems requiring the original part number, the LM2597M-3.3/NOPB provides full functional and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LM2597M-3.3/NOPB replace the LM2597M-3.3 in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The LM2597M-3.3/NOPB is a direct substitute with no design modifications required.

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

A: The "/NOPB" designation indicates lead-free, RoHS-compliant manufacturing. This reflects the part's compliance with current environmental regulations.

Q: Are there differences in thermal performance between these parts?

A: No. Both parts operate across the same temperature range (-40°C to 125°C junction temperature) and share identical thermal characteristics.

Q: What is the significance of the product status difference?

A: The LM2597M-3.3 is obsolete, meaning Texas Instruments no longer manufactures it. The LM2597M-3.3/NOPB maintains active production status, ensuring reliable supply and technical support availability.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts use the 8-SOIC (0.154", 3.90mm Width) package with identical pinout and footprint requirements. No PCB modifications are necessary.

Q: Does RoHS3 compliance affect circuit performance?

A: No. RoHS3 compliance reflects manufacturing process standards and material composition. Electrical performance and functional characteristics remain unchanged.