LM2594N-12 Equivalent & Substitute Parts

Part Overview

The LM2594N-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 device 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 LM2594N-12 is classified as obsolete. Finding equivalent or 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

LM2594N-12

Texas InstrumentsIn Stock: 2127LM2594N-12 Datasheet

Current PartRFQ

LM2594N-12/NOPB

Texas InstrumentsIn Stock: 1332LM2594N-12/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2594N-12 is determined by strict equivalence across the following electrical and mechanical parameters:

• Output voltage specification: Fixed 12V output
• Output current capability: 500mA minimum
• Input voltage range: 4.5V to 40V
• Switching topology: Buck converter
• Package type: 8-DIP (0.300", 7.62mm) through-hole
• Switching frequency: 150kHz
• Operating temperature range: -40°C to 125°C

The LM2594N-12/NOPB qualifies as a direct substitute because it maintains identical electrical specifications and mechanical packaging while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM2594N-12/NOPB is the direct substitute for the obsolete LM2594N-12. Both devices share identical electrical performance and mechanical compatibility. The LM2594N-12/NOPB offers the following advantages:

• Active product status: Currently manufactured and supported by Texas Instruments
• ROHS3 compliance: Meets current environmental and regulatory requirements
• Improved supply availability: 1272 units in stock versus 2100 units of the obsolete variant
• Tube packaging: Standard production packaging format for active components

For new designs or component replacement, the LM2594N-12/NOPB is the recommended selection. Existing designs using the LM2594N-12 can transition to the LM2594N-12/NOPB without circuit modifications, as all electrical and mechanical parameters remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the LM2594N-12/NOPB replace the LM2594N-12 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The LM2594N-12/NOPB is a direct substitute with no circuit modifications required.

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

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, reflecting compliance with RoHS3 regulations. This is the standard designation for current production variants.

Q: Are there any package differences between these parts?

A: Both parts use the same 8-DIP (0.300", 7.62mm) through-hole package. The primary difference is packaging format: the LM2594N-12/NOPB is supplied in tubes, which is standard for active production components.

Q: Why is the original LM2594N-12 marked as obsolete?

A: The LM2594N-12 has been superseded by the LM2594N-12/NOPB, which incorporates RoHS3 compliance and reflects current manufacturing standards. Texas Instruments maintains the LM2594N-12/NOPB as the active variant.

Q: Are the electrical specifications identical between both parts?

A: Yes. Input voltage range (4.5V to 40V), output voltage (12V), output current (500mA), switching frequency (150kHz), and operating temperature range (-40°C to 125°C) are identical across both parts.

Q: Can I use the LM2594N-12/NOPB in applications requiring RoHS compliance?

A: Yes. The LM2594N-12/NOPB is ROHS3 compliant, making it suitable for applications with RoHS requirements. The original LM2594N-12 is not RoHS compliant.