LM25115AMT Equivalent & Substitute Parts

Part Overview

The LM25115AMT is a Power Supply Controller designed for secondary-side regulation applications with input voltage range of 0V to 42V and supply voltage range of 4.5V to 30V. This integrated circuit operates in the 16-TSSOP surface mount package and is classified as obsolete by the manufacturer. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for ongoing design support, production continuity, and component sourcing in applications requiring secondary-side controller functionality.

Substiute Parts

LM25115AMT

Texas InstrumentsIn Stock: 1511LM25115AMT Datasheet

Current PartRFQ

LM25115AMT/NOPB

Texas InstrumentsIn Stock: 858LM25115AMT/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM25115AMT is determined by strict equivalence across the following critical parameters:

• Input voltage specification: 0V ~ 42V
• Supply voltage specification: 4.5V ~ 30V
• Supply current requirement: 4 mA
• Operating temperature range: -40°C ~ 125°C
• Package type: 16-TSSOP surface mount
• Functional application: Secondary-side controller

The LM25115AMT/NOPB qualifies as a direct substitute based on identical electrical specifications, identical package configuration, and identical functional application. The primary distinction between these parts is product status and packaging format, not electrical or mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The LM25115AMT/NOPB is the direct functional equivalent for the obsolete LM25115AMT. Selection of the substitute part is based on the following engineering criteria:

• All electrical parameters are identical across input voltage, supply voltage, supply current, and operating temperature specifications
• Package configuration and pinout are identical, ensuring direct PCB compatibility
• Both parts are manufactured by Texas Instruments and serve identical secondary-side controller applications
• The substitute part carries Active product status, ensuring continued availability and manufacturer support
• The substitute part meets ROHS3 compliance requirements, whereas the original part is RoHS non-compliant
• Packaging format differs (Tube for substitute versus unspecified for original), which affects procurement and handling but not electrical or mechanical compatibility

Frequently Asked Questions (FAQ)

Q: Can the LM25115AMT/NOPB be used as a direct replacement for the LM25115AMT?

A: Yes. The LM25115AMT/NOPB is electrically and mechanically identical to the LM25115AMT. All voltage specifications, current ratings, temperature ranges, and package dimensions match exactly. Direct substitution is supported without circuit modification.

Q: What is the significance of the "/NOPB" suffix in the part number?

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging, reflecting RoHS3 compliance. This designation distinguishes the substitute part's compliance status from the original part but does not affect electrical functionality or pin compatibility.

Q: Are there any compatibility concerns when substituting the LM25115AMT with the LM25115AMT/NOPB?

A: No compatibility concerns exist. The parts are pin-for-pin compatible with identical package dimensions (16-TSSOP, 0.173" width, 4.40mm). PCB layouts, solder profiles, and circuit designs require no modification.

Q: Why is the original LM25115AMT classified as obsolete?

A: The LM25115AMT is obsolete due to its RoHS non-compliant status. The LM25115AMT/NOPB represents the current production equivalent that meets modern regulatory requirements while maintaining identical functionality.

Q: What packaging formats are available for these parts?

A: The LM25115AMT/NOPB is supplied in Tube packaging. Packaging format affects procurement logistics and component handling but does not influence electrical performance or circuit compatibility.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the LM25115AMT and LM25115AMT/NOPB operate across the identical temperature range of -40°C to 125°C, supporting equivalent thermal performance in secondary-side controller applications.