LM2597N-3.3 Equivalent & Substitute Parts

Part Overview

The LM2597N-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-DIP through-hole package.

The LM2597N-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

LM2597N-3.3

Texas InstrumentsIn Stock: 1940LM2597N-3.3 Datasheet

Current PartRFQ

LM2597N-3.3/NOPB

Texas InstrumentsIn Stock: 1068LM2597N-3.3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2597N-3.3 are identified based on strict electrical and mechanical parameter matching:

Substitution Criteria:

• Identical output voltage: 3.3V fixed
• Matching output current rating: 500mA minimum
• Compatible input voltage range: 4.5V to 40V
• Same switching topology: Buck regulator
• Identical switching frequency: 150kHz
• Same package form factor: 8-DIP (0.300", 7.62mm)
• Through-hole mounting compatibility
• Operating temperature range: -40°C to 125°C

The LM2597N-3.3/NOPB qualifies as a direct substitute, meeting all electrical specifications and mechanical requirements while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM2597N-3.3/NOPB is the direct substitute for the obsolete LM2597N-3.3. Both components share identical electrical specifications and mechanical form factors, ensuring pin-for-pin and functional compatibility.

The LM2597N-3.3/NOPB offers the following advantages:

• Active product status with ongoing manufacturing support
• ROHS3 compliance, meeting current environmental and regulatory requirements
• Tube packaging for improved component handling and traceability
• Consistent availability through active distribution channels

No design modifications are required when transitioning from LM2597N-3.3 to LM2597N-3.3/NOPB. The electrical performance, thermal characteristics, and circuit integration remain identical.

Frequently Asked Questions (FAQ)

Q: Can LM2597N-3.3/NOPB be used as a direct replacement for LM2597N-3.3?

A: Yes. Both parts are manufactured by Texas Instruments and share identical electrical specifications, output voltage (3.3V), output current (500mA), input voltage range (4.5V to 40V), switching frequency (150kHz), and 8-DIP package form factor. No circuit modifications are required.

Q: What is the difference between LM2597N-3.3 and LM2597N-3.3/NOPB?

A: The primary differences are product status and compliance. LM2597N-3.3 is obsolete and RoHS non-compliant, while LM2597N-3.3/NOPB is active and ROHS3 compliant. The "/NOPB" suffix indicates lead-free solder ball construction. Electrical and mechanical specifications are identical.

Q: Are there any PCB layout considerations when substituting these parts?

A: No. Both components use the same 8-DIP (0.300", 7.62mm) through-hole package. Existing PCB designs require no modifications for footprint, pin spacing, or mounting hole placement.

Q: What is the operating temperature range for both parts?

A: Both the LM2597N-3.3 and LM2597N-3.3/NOPB operate across -40°C to 125°C junction temperature, supporting industrial and extended temperature applications.

Q: Why is RoHS compliance important for this substitution?

A: ROHS3 compliance ensures the LM2597N-3.3/NOPB meets current environmental regulations and is suitable for applications subject to RoHS requirements. The obsolete LM2597N-3.3 does not carry this certification.