LM2594N-ADJ Equivalent & Substitute Parts

Part Overview

The LM2594N-ADJ is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. This component delivers 500mA output current across an input voltage range of 4.5V to 40V, with adjustable output voltage from 1.2V to 37V. The device is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity.

Substiute Parts

LM2594N-ADJ

Texas InstrumentsIn Stock: 2382LM2594N-ADJ Datasheet

Current PartRFQ

LM2594N-ADJ/NOPB

Texas InstrumentsIn Stock: 3784LM2594N-ADJ/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2594N-ADJ is determined by strict equivalence across the following critical parameters:

• Input voltage range: 4.5V to 40V
• Output voltage adjustability: 1.2V to 37V
• Output current capacity: 500mA
• Switching frequency: 150kHz
• Package type: 8-DIP (0.300", 7.62mm)
• Mounting configuration: Through Hole
• Operating temperature range: -40°C to 125°C

The LM2594N-ADJ/NOPB qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility. The primary distinction between these parts is product status and packaging format, not functional capability.

Parameter Comparison

Engineering Selection Recommendations

The LM2594N-ADJ/NOPB is the direct functional equivalent of the LM2594N-ADJ. Both parts share identical electrical performance specifications and mechanical compatibility. The LM2594N-ADJ/NOPB is preferred for new designs and production continuity due to its active product status and ROHS3 compliance, whereas the original LM2594N-ADJ is classified as obsolete. The /NOPB suffix indicates lead-free packaging, reflecting modern manufacturing standards. Selection between these parts should be based on supply chain availability, compliance requirements, and inventory status rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can the LM2594N-ADJ/NOPB be used as a direct replacement for the LM2594N-ADJ?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including input/output voltage ranges, output current, switching frequency, and package configuration. The primary difference is product status and RoHS compliance level.

Q: What does the /NOPB suffix indicate?

A: The /NOPB suffix denotes a lead-free (Pb-free) package variant compliant with RoHS3 standards. This reflects the manufacturing process and environmental compliance classification, not functional differences.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist. Both parts use the 8-DIP (0.300", 7.62mm) through-hole package with identical pinout and electrical characteristics. PCB layouts and circuit designs require no modification.

Q: Why is the LM2594N-ADJ classified as obsolete?

A: Product obsolescence reflects Texas Instruments' lifecycle management. The LM2594N-ADJ/NOPB remains in active production and is the recommended part for all applications requiring this functional specification.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by matching input voltage range (4.5V–40V), output voltage adjustability (1.2V–37V), output current (500mA), switching frequency (150kHz), package type (8-DIP), and operating temperature range (-40°C to 125°C).