LM25115SD Equivalent & Substitute Parts

Part Overview

The LM25115SD is a Secondary-Side Controller IC manufactured by Texas Instruments, designed for power supply applications with input voltage range of 0V to 42V and supply voltage of 4.5V to 30V. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The 16-WSON (5x5) package format and specific control characteristics define the substitution criteria for this power management device.

Substiute Parts

LM25115SD

Texas InstrumentsIn Stock: 814LM25115SD Datasheet

Current PartRFQ

DM7308G-65512-B1

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM25115SD is determined by functional equivalence in power management control architecture. The primary substitute identified is the DM7308G-65512-B1 from Bel Power Solutions, classified as a Digital Power Controller within the dPWER® series.

Substitution logic is based on the following allowed parameters:

• Category alignment: Both components function as power management controllers
• Supply voltage compatibility: The substitute operates within 3V to 3.6V supply range
• Current consumption: Substitute draws 12 mA supply current
• Operating temperature range: Substitute supports -40°C to 85°C
• Surface mount capability: Both use surface mount technology
• Package format: Substitute uses 64-QFN (9x9) configuration
• Compliance status: Substitute is ROHS3 compliant and REACH unaffected
• Product status: Substitute is active, addressing obsolescence of the original part

Parameter Comparison

Engineering Selection Recommendations

Selection of the DM7308G-65512-B1 as a substitute for the LM25115SD is supported by the following engineering factors:

• Active product status ensures long-term availability and supply chain continuity
• ROHS3 compliance aligns with current environmental and regulatory requirements
• Surface mount technology compatibility maintains manufacturing process consistency
• Operating temperature range of -40°C to 85°C covers standard industrial and commercial applications
• REACH unaffected status confirms regulatory compliance for international markets
• Identical ECCN and HTSUS classifications maintain export and import compliance

The substitute operates at a narrower supply voltage range (3V to 3.6V) compared to the original part (4.5V to 30V), requiring circuit design verification for specific application requirements. The increased supply current consumption (12 mA versus 4 mA) and different package format (64-QFN versus 16-WFDFN) necessitate layout and thermal management assessment during integration.

Frequently Asked Questions (FAQ)

Q: Why is the LM25115SD being replaced? A: The LM25115SD is classified as obsolete. The DM7308G-65512-B1 provides functional equivalence as an active power management controller, ensuring design continuity and supply availability.

Q: Are the package formats interchangeable? A: No. The LM25115SD uses 16-WFDFN (5x5) packaging while the DM7308G-65512-B1 uses 64-QFN (9x9) packaging. PCB layout and footprint redesign is required for substitution.

Q: What are the supply voltage differences? A: The original part accepts 4.5V to 30V supply voltage, while the substitute operates at 3V to 3.6V. Circuit design must be verified to ensure the substitute's narrower voltage range is compatible with the application.

Q: Does the substitute meet current environmental standards? A: Yes. The DM7308G-65512-B1 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original part is RoHS non-compliant.

Q: What is the impact of increased supply current consumption? A: The substitute draws 12 mA compared to the original 4 mA. Power supply design and thermal management must account for this 3x increase in quiescent current consumption.

Q: Are there temperature range limitations? A: The substitute supports -40°C to 85°C operation, which is narrower than the original -40°C to 125°C range. Applications requiring operation above 85°C require alternative solutions.

Q: What moisture sensitivity considerations apply? A: The original part has MSL 1 (unlimited shelf life), while the substitute has MSL 3 (168 hours). Storage and handling procedures must comply with MSL 3 requirements to prevent moisture-related failures.