LM5034MTC Equivalent & Substitute Parts

Part Overview

The LM5034MTC is a forward converter regulator controller IC manufactured by Texas Instruments, designed for positive, isolation-capable output step-up/step-down DC-DC applications. This device operates across a wide supply voltage range of 13V to 100V and features dual-output, dual-phase topology with synchronous rectifier support and clock synchronization capabilities.

The LM5034MTC is designated as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this controller.

Substiute Parts

LM5034MTC

Texas InstrumentsIn Stock: 5064LM5034MTC Datasheet

Current PartRFQ

LM5034MTC/NOPB

Texas InstrumentsIn Stock: 3662LM5034MTC/NOPB Datasheet

DirectRFQ

LM5034MTCX/NOPB

National SemiconductorIn Stock: 4894LM5034MTCX/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM5034MTC are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution validity:

Critical Matching Parameters:

• Package / Case: 20-TSSOP form factor (0.173", 4.40mm Width)
• Topology: Forward Converter
• Output Configuration: Positive, Isolation Capable
• Number of Outputs: 2
• Output Phases: 2
• Voltage - Supply Range: 13V ~ 100V
• Switching Frequency: 200kHz, 600kHz
• Duty Cycle (Max): 76%
• Synchronous Rectifier: Yes
• Clock Sync: Yes
• Control Features: Frequency Control, Soft Start
• Operating Temperature Range: -40°C ~ 125°C (TJ)

All identified substitute parts maintain identical electrical specifications and mechanical compatibility with the LM5034MTC, ensuring direct functional equivalence in forward converter applications.

Parameter Comparison

Engineering Selection Recommendations

LM5034MTC/NOPB is a direct equivalent to the LM5034MTC, differing only in packaging format (Tube versus unspecified). Both parts maintain Last Time Buy status and identical electrical specifications. This substitute is suitable for applications requiring the same performance characteristics with tube packaging.

LM5034MTCX/NOPB is a manufacturer-recommended substitute manufactured by National Semiconductor. This part maintains all critical electrical and mechanical parameters identical to the LM5034MTC. The primary distinction is Active product status, indicating ongoing availability and production support. This substitute is preferred for new designs or applications requiring extended supply chain assurance beyond the Last Time Buy designation of the original part.

Both substitute parts are ROHS3 compliant and maintain the same thermal operating range, making them suitable for direct replacement in existing forward converter applications.

Frequently Asked Questions (FAQ)

Q: Can LM5034MTC/NOPB be used as a direct replacement for LM5034MTC?

A: Yes. LM5034MTC/NOPB is electrically and mechanically identical to LM5034MTC. The difference is packaging format (Tube). Both parts are Last Time Buy status and suitable for direct substitution in forward converter applications.

Q: What is the primary advantage of LM5034MTCX/NOPB over LM5034MTC?

A: LM5034MTCX/NOPB maintains Active product status, indicating ongoing manufacturer support and production availability. The LM5034MTC is Last Time Buy, meaning production has been discontinued. For applications requiring long-term supply assurance, LM5034MTCX/NOPB is the recommended choice.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 20-TSSOP package with identical pinout and electrical characteristics, ensuring pin-for-pin compatibility in PCB designs.

Q: Do the substitute parts support the same switching frequencies as the original LM5034MTC?

A: Yes. Both LM5034MTC/NOPB and LM5034MTCX/NOPB support 200kHz and 600kHz switching frequencies, matching the original part specifications.

Q: Are there any compliance differences between the substitute parts?

A: LM5034MTC and LM5034MTC/NOPB are both ROHS3 compliant with MSL 1 (Unlimited). LM5034MTCX/NOPB compliance specifications are not provided in the available data. Verify compliance requirements with the manufacturer if regulatory certification is critical for your application.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All three parts are functionally equivalent with identical electrical specifications, package form factor, and thermal operating range. No design modifications are required for substitution.