LM5115MTC Equivalent & Substitute Parts

Part Overview

The LM5115MTC is a secondary-side power supply controller manufactured by Texas Instruments, designed for isolated power conversion applications. This IC operates as a secondary-side controller in flyback and forward converter topologies, managing output voltage regulation and synchronous rectification control. The main part number LM5115MTC carries a Last Time Buy status, indicating discontinued production. The substitute part LM5115MTC/NOPB maintains identical electrical and mechanical specifications while offering Active product status with continued availability, making it the direct replacement for new designs and inventory replenishment.

Substiute Parts

LM5115MTC

Texas InstrumentsIn Stock: 2488LM5115MTC Datasheet

Current PartRFQ

LM5115MTC/NOPB

Texas InstrumentsIn Stock: 1936LM5115MTC/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The LM5115MTC and LM5115MTC/NOPB are direct equivalents based on the following substitution criteria:

Electrical Parameters Match:

• Input voltage range: 5V ~ 30V (identical)
• Supply voltage range: 5V ~ 7.5V (identical)
• Supply current: 4 mA (identical)
• Operating temperature range: -40°C ~ 125°C (identical)

Mechanical Parameters Match:

• Package type: 16-TSSOP with identical physical dimensions (0.173", 4.40mm Width)
• Mounting type: Surface Mount (identical)
• Supplier device package: 16-TSSOP (identical)

Compliance & Environmental Parameters Match:

• RoHS Status: ROHS3 Compliant (both parts)
• Moisture Sensitivity Level: MSL 1 (Unlimited) for both parts
• REACH Status: REACH Unaffected (both parts)

The "/NOPB" suffix indicates lead-free plating without lead-free solder, representing a manufacturing variant of the base LM5115 product. Both parts share identical functional specifications and are pin-for-pin compatible.

Parameter Comparison

Engineering Selection Recommendations

The LM5115MTC/NOPB is the direct substitute for the LM5115MTC. Selection between these parts should be based on product lifecycle and availability requirements:

LM5115MTC/NOPB Selection Criteria:

• Active product status ensures continued manufacturing and supply chain availability
• ROHS3 compliance and MSL 1 rating meet current environmental and reliability standards
• Recommended for new designs and production builds requiring long-term component availability
• Identical electrical and mechanical specifications eliminate redesign requirements

LM5115MTC Selection Criteria:

• Last Time Buy status indicates limited remaining inventory (2415 Pcs reported)
• Suitable only for legacy system maintenance or existing inventory replenishment where supply is confirmed
• Not recommended for new production programs

Both parts are functionally equivalent and pin-for-pin compatible. The choice between them is determined by supply chain strategy and product lifecycle phase rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Are LM5115MTC and LM5115MTC/NOPB pin-for-pin compatible? A: Yes. Both parts use the 16-TSSOP package with identical pinout and electrical characteristics. Direct PCB substitution is possible without layout modifications.

Q: What does the "/NOPB" suffix indicate? A: The "/NOPB" designation specifies the lead-free plating variant without lead-free solder. This is a manufacturing specification that does not affect functional performance or electrical characteristics.

Q: Can I use LM5115MTC/NOPB in place of LM5115MTC? A: Yes. The LM5115MTC/NOPB is a direct equivalent with identical input voltage (5V ~ 30V), supply voltage (5V ~ 7.5V), supply current (4 mA), operating temperature range (-40°C ~ 125°C), and package specifications. No circuit modifications are required.

Q: Why is LM5115MTC marked as Last Time Buy? A: Last Time Buy status indicates Texas Instruments has discontinued this product variant. The LM5115MTC/NOPB remains in active production and is the recommended substitute for ongoing applications.

Q: Are there any compliance differences between these parts? A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Compliance certifications are identical.

Q: What is the maximum operating temperature for both parts? A: Both the LM5115MTC and LM5115MTC/NOPB operate across the temperature range of -40°C to 125°C, making them suitable for industrial and automotive applications within this range.

Q: Can these parts be used in high-temperature applications above 125°C? A: No. The specified operating temperature range is -40°C ~ 125°C. Applications requiring higher temperature operation require alternative components rated for those conditions.