LM2737MTC Buck Regulator Controller Equivalent & Substitute Parts

Part Overview

The LM2737MTC is a buck regulator positive output step-down DC-DC controller IC in 14-TSSOP packaging, manufactured by Texas Instruments. This component functions as a transistor driver for step-down voltage conversion applications with a single output phase. The LM2737MTC is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Active alternatives with identical electrical and mechanical specifications are available from the same manufacturer.

Substiute Parts

LM2737MTC

Texas InstrumentsIn Stock: 8196LM2737MTC Datasheet

Current PartRFQ

LM2737MTC/NOPB

Texas InstrumentsIn Stock: 5494LM2737MTC/NOPB Datasheet

DirectRFQ

LM2727MTC/NOPB

Texas InstrumentsIn Stock: 981LM2727MTC/NOPB Datasheet

Parametric EquivalentRFQ

LM2742MTC/NOPB

Texas InstrumentsIn Stock: 911LM2742MTC/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2737MTC is determined by strict equivalence across the following critical parameters:

• Electrical Specifications: Voltage supply range (4.5V ~ 5.5V), switching frequency range (50kHz ~ 2MHz), duty cycle maximum (90%), and control feature set (Current Limit, Enable, Frequency Control, Power Good, Soft Start)
• Functional Topology: Buck topology with positive output configuration, single output phase, and transistor driver output type
• Mechanical Compatibility: 14-TSSOP package with 0.173" width (4.40mm) and surface mount mounting type
• Environmental Specifications: Operating temperature range of -40°C ~ 125°C (TJ)

All substitute parts listed maintain identical specifications across these parameters, ensuring direct functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

LM2737MTC/NOPB is the direct manufacturer equivalent with identical electrical and mechanical specifications. This part is active in production and carries ROHS3 compliance, making it the primary choice for new designs and production continuity. The /NOPB suffix indicates lead-free packaging, aligning with modern environmental standards.

LM2727MTC/NOPB and LM2742MTC/NOPB are parametric equivalents that maintain all critical electrical and mechanical specifications. Both parts are active in production with ROHS3 compliance. Selection between these alternatives depends on design-specific requirements not differentiated by the provided parameters.

All three substitute parts address the obsolescence of the original LM2737MTC while maintaining functional and mechanical compatibility. The transition from RoHS non-compliant to ROHS3 compliant alternatives reflects current manufacturing standards and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can LM2737MTC/NOPB directly replace LM2737MTC in existing designs?

A: Yes. LM2737MTC/NOPB maintains identical electrical specifications, control features, operating temperature range, and 14-TSSOP package configuration. The primary difference is ROHS3 compliance and lead-free packaging in the /NOPB variant.

Q: What is the difference between LM2737MTC/NOPB, LM2727MTC/NOPB, and LM2742MTC/NOPB?

A: All three parts share identical electrical and mechanical specifications across voltage supply, switching frequency, duty cycle, control features, operating temperature, and package type. Differences exist only in base product numbers (LM2737, LM2727, LM2742) and inventory availability. Selection should be based on design-specific requirements and supply chain considerations.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use 14-TSSOP packaging with 0.173" width (4.40mm) and surface mount mounting type, ensuring mechanical compatibility with existing PCB layouts.

Q: What compliance certifications apply to the substitute parts?

A: LM2737MTC/NOPB, LM2727MTC/NOPB, and LM2742MTC/NOPB are all ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. All parts carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: Why is the original LM2737MTC obsolete?

A: The LM2737MTC is classified as obsolete by the manufacturer. Active alternatives with identical specifications are available to ensure design continuity and production support.