LM2747MTCX Equivalent & Substitute Parts

Part Overview

The LM2747MTCX is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in a 14-TSSOP package. This device functions as a transistor driver for step-down voltage conversion applications with a single output phase. The LM2747MTCX is currently classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

LM2747MTCX

Texas InstrumentsIn Stock: 4228LM2747MTCX Datasheet

Current PartRFQ

LM2747MTCX/NOPB

National SemiconductorIn Stock: 18251LM2747MTCX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2747MTCX are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Package / Case: 14-TSSOP (0.173", 4.40mm Width)
• Voltage - Supply (Vcc/Vdd): 3V ~ 6V
• Frequency - Switching: 50kHz ~ 1MHz
• Duty Cycle (Max): 86%
• Output Type: Transistor Driver
• Function: Step-Down
• Output Configuration: Positive
• Topology: Buck
• Number of Outputs: 1
• Output Phases: 1
• Synchronous Rectifier: Yes
• Control Features: Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
• Operating Temperature: -40°C ~ 125°C (TJ)
• Mounting Type: Surface Mount

The LM2747MTCX/NOPB qualifies as a direct substitute, maintaining identical electrical specifications and mechanical compatibility while offering active product status.

Parameter Comparison

Engineering Selection Recommendations

The LM2747MTCX/NOPB is the direct equivalent substitute for the obsolete LM2747MTCX. Both parts share identical electrical and mechanical specifications, including supply voltage range, switching frequency capability, duty cycle rating, control features, and thermal operating range. The primary distinction is product status: the LM2747MTCX/NOPB maintains active availability, ensuring procurement continuity and long-term supply chain reliability.

Both parts comply with identical export control classifications (ECCN: EAR99) and tariff codes (HTSUS: 8542.39.0001). The 14-TSSOP package footprint is identical, permitting direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the LM2747MTCX/NOPB be used as a direct replacement for the LM2747MTCX?

A: Yes. The LM2747MTCX/NOPB is electrically and mechanically identical to the LM2747MTCX. All functional parameters, including supply voltage, switching frequency, duty cycle, control features, and operating temperature range, are matched. The 14-TSSOP package dimensions are identical, enabling direct PCB substitution.

Q: What is the significance of the "/NOPB" suffix in the part number?

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) packaging designation. This denotes RoHS compliance and lead-free solder compatibility, distinguishing it from older lead-containing variants.

Q: Are there any compliance or certification differences between these parts?

A: Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Compliance differences are not present in the provided specifications.

Q: Why is the LM2747MTCX classified as obsolete?

A: The LM2747MTCX is listed as obsolete by the original manufacturer. The LM2747MTCX/NOPB remains in active production, providing continued availability for this buck regulator controller function.

Q: Are there any thermal or electrical performance differences?

A: No. Both parts operate across the identical temperature range (-40°C ~ 125°C junction temperature) and maintain the same electrical specifications for voltage supply, switching frequency, duty cycle, and control features.