LM5115AMT Equivalent & Substitute Parts

Part Overview

The LM5115AMT is a secondary-side power supply controller manufactured by Texas Instruments, designed for isolated power conversion applications. It operates with input voltage ranging from 5V to 30V and supply voltage from 5V to 7.5V, delivering 4 mA supply current. The device is packaged in a 16-TSSOP surface-mount package and is classified as obsolete product status.

Due to its obsolete classification, identifying equivalent and substitute parts is necessary for design continuity, production planning, and long-term system reliability. Active alternatives and direct manufacturer variants are available to support ongoing applications.

Substiute Parts

LM5115AMT

Texas InstrumentsIn Stock: 4391LM5115AMT Datasheet

Current PartRFQ

LM5115AMT/NOPB

Texas InstrumentsIn Stock: 998LM5115AMT/NOPB Datasheet

DirectRFQ

DM7308G-65512-B1

Bel Power SolutionsIn Stock: 840DM7308G-65512-B1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM5115AMT is determined by the following critical parameters:

Primary Substitution Criteria:

• Application type: Secondary-Side Controller functionality
• Input voltage range: 5V ~ 30V
• Supply voltage range: 5V ~ 7.5V
• Supply current: 4 mA
• Operating temperature range: -40°C ~ 125°C
• Mounting type: Surface Mount
• Package compatibility: 16-TSSOP form factor

Substitute Categories:

1. Direct Manufacturer Variant (LM5115AMT/NOPB): Identical electrical specifications and package, manufactured by Texas Instruments with active product status and RoHS3 compliance.

2. Alternative Manufacturer Controller (DM7308G-65512-B1): Bel Power Solutions digital power controller with different package (64-QFN) and modified electrical specifications. This part operates with 3V ~ 3.6V supply voltage and 12 mA supply current, representing a functional alternative for digital power control applications but with different electrical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

LM5115AMT/NOPB (Recommended Primary Substitute): This part is the direct manufacturer variant with identical electrical specifications and package form factor. It maintains full compatibility with existing designs while offering active product status and RoHS3 compliance. Selection of this part eliminates design modifications and ensures functional equivalence.

DM7308G-65512-B1 (Alternative Consideration): This Bel Power Solutions part represents a functional alternative for digital power control applications. However, it introduces significant differences: different package (64-QFN versus 16-TSSOP), reduced supply voltage range (3V ~ 3.6V versus 5V ~ 7.5V), increased supply current (12 mA versus 4 mA), and reduced operating temperature maximum (-40°C ~ 85°C versus -40°C ~ 125°C). Selection of this part requires design review and potential circuit modifications.

Compliance Considerations: Both substitute parts are RoHS3 compliant and REACH unaffected, supporting modern regulatory requirements. The original LM5115AMT is RoHS non-compliant; migration to compliant alternatives is recommended for new designs and long-term production planning.

Frequently Asked Questions (FAQ)

Q: Can LM5115AMT/NOPB be used as a direct replacement for LM5115AMT? A: Yes. LM5115AMT/NOPB is the direct manufacturer variant with identical electrical specifications, package form factor, and functional performance. It is a pin-for-pin and functionally equivalent substitute.

Q: What are the key differences between LM5115AMT and DM7308G-65512-B1? A: The DM7308G-65512-B1 differs in multiple critical parameters: package type (64-QFN versus 16-TSSOP), supply voltage range (3V ~ 3.6V versus 5V ~ 7.5V), supply current (12 mA versus 4 mA), and maximum operating temperature (85°C versus 125°C). These differences require design evaluation before substitution.

Q: Is the LM5115AMT still available for new designs? A: The LM5115AMT is classified as obsolete. For new designs, LM5115AMT/NOPB is the recommended active alternative from Texas Instruments with identical specifications and RoHS3 compliance.

Q: What packaging considerations apply to these substitutes? A: LM5115AMT and LM5115AMT/NOPB both use 16-TSSOP packaging with 0.173" width (4.40mm). DM7308G-65512-B1 uses 64-QFN (9x9) packaging, requiring different PCB layout and footprint design.

Q: Are there RoHS compliance differences between these parts? A: Yes. LM5115AMT is RoHS non-compliant. Both LM5115AMT/NOPB and DM7308G-65512-B1 are RoHS3 compliant, supporting modern regulatory requirements for new production and design initiatives.

Q: What is the moisture sensitivity level (MSL) for each part? A: LM5115AMT and LM5115AMT/NOPB both have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. DM7308G-65512-B1 has MSL 3 (168 Hours), requiring controlled storage and handling procedures.