LM25115MT Equivalent & Substitute Parts

Part Overview

The LM25115MT 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 component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement planning. The LM25115MT/NOPB variant provides a direct functional equivalent with active product status and improved compliance characteristics.

Substiute Parts

LM25115MT

Texas InstrumentsIn Stock: 1933LM25115MT Datasheet

Current PartRFQ

LM25115MT/NOPB

Texas InstrumentsIn Stock: 1080LM25115MT/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM25115MT is determined by strict equivalence across the following parameters:

• Input voltage range: 0V ~ 42V
• Supply voltage range: 4.5V ~ 30V
• Supply current: 4 mA
• Operating temperature range: -40°C ~ 125°C
• Package type: 16-TSSOP
• Physical dimensions: 0.173" width, 4.40mm width
• Functional application: Secondary-Side Controller

The LM25115MT/NOPB meets all substitution criteria as a direct equivalent, maintaining identical electrical specifications and package configuration while offering active product status and enhanced compliance posture.

Parameter Comparison

Engineering Selection Recommendations

The LM25115MT/NOPB is the direct functional equivalent for the obsolete LM25115MT. Selection between these parts should be based on the following factors:

Product Status: The LM25115MT is classified as obsolete, indicating discontinued manufacturing and limited long-term availability. The LM25115MT/NOPB maintains active product status, ensuring continued supply and manufacturing support from Texas Instruments.

Compliance Posture: The LM25115MT/NOPB provides ROHS3 compliance, whereas the original LM25115MT is RoHS non-compliant. This distinction is significant for applications subject to regulatory requirements or customer specifications mandating RoHS compliance.

Electrical and Mechanical Equivalence: Both parts maintain identical electrical specifications across input voltage, supply voltage, supply current, and operating temperature ranges. Package configuration, physical dimensions, and mounting type are identical, ensuring direct PCB-level compatibility without layout modifications.

Packaging: The LM25115MT/NOPB is supplied in tube packaging, which may differ from the original part's packaging format. Verify packaging compatibility with assembly and handling procedures.

Frequently Asked Questions (FAQ)

Q: Can the LM25115MT/NOPB be used as a direct replacement for the LM25115MT?

A: Yes. The LM25115MT/NOPB is electrically and mechanically equivalent to the LM25115MT. All critical parameters including voltage ranges, current specifications, operating temperature, and package configuration are identical. No circuit modifications or PCB layout changes are required.

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

A: The "/NOPB" suffix designates "No Plumbum" (lead-free) packaging, indicating compliance with RoHS directives. This is a manufacturing and compliance designation that does not affect electrical functionality or pin compatibility.

Q: Why is the LM25115MT classified as obsolete?

A: Obsolete status indicates that Texas Instruments has discontinued manufacturing of this part number. The LM25115MT/NOPB represents the active equivalent, ensuring continued availability and manufacturing support.

Q: Are there any differences in performance between the LM25115MT and LM25115MT/NOPB?

A: No performance differences exist. Both parts operate identically within the specified electrical parameters. The primary distinction is product status and RoHS compliance.

Q: What is the moisture sensitivity level, and does it affect handling?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling procedures for surface-mount components apply.

Q: Is the 16-TSSOP package compatible with existing PCB designs?

A: Yes. Both parts use the identical 16-TSSOP package with 0.173" width and 4.40mm dimensions. Existing PCB designs require no modification for package compatibility.