LM2733XMF Equivalent & Substitute Parts

Part Overview

The LM2733XMF is a boost switching regulator IC manufactured by Texas Instruments, designed for step-up voltage conversion applications. This device operates as a positive adjustable output regulator with a single 1A switch output, suitable for surface mount assembly in SC-74A (SOT-753) packaging. The LM2733XMF is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term product support.

Substiute Parts

LM2733XMF

Texas InstrumentsIn Stock: 1482LM2733XMF Datasheet

Current PartRFQ

LM2733XMF/NOPB

Texas InstrumentsIn Stock: 7265LM2733XMF/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2733XMF is determined by strict equivalence across the following critical parameters:

• Boost topology with positive adjustable output configuration
• Input voltage range: 2.7V minimum to 14V maximum
• Output voltage range: 2.7V minimum to 40V maximum
• Output current capability: 1A switch current
• Switching frequency: 1.6MHz
• Package compatibility: SC-74A (SOT-753) surface mount form factor
• Operating temperature range: -40°C to 125°C
• Regulatory compliance: ROHS3 compliant, REACH unaffected

Only parts meeting all these specifications across all parameters are considered direct substitutes. Deviations in any parameter disqualify a part from substitution consideration.

Parameter Comparison

Engineering Selection Recommendations

The LM2733XMF/NOPB is the direct manufacturer-recommended substitute for the LM2733XMF. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all parameters. The primary distinction is product status: the original LM2733XMF is in Last Time Buy phase, while the LM2733XMF/NOPB maintains Active status with significantly higher inventory availability (7237 pieces versus 1421 pieces).

The "/NOPB" suffix indicates lead-free plating without lead (Pb), consistent with ROHS3 compliance requirements. Both parts maintain equivalent RoHS and REACH compliance certifications. For new designs and production continuity, the LM2733XMF/NOPB is the appropriate selection due to its active product status and sustained supply chain support.

Frequently Asked Questions (FAQ)

Q: Can the LM2733XMF/NOPB be used as a direct replacement for the LM2733XMF?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including input/output voltage ranges, current ratings, switching frequency, package type, and operating temperature range. The substitution is direct with no design modifications required.

Q: What does the "/NOPB" suffix mean?

A: The "/NOPB" designation indicates the part uses lead-free plating without lead (Pb). This is standard for ROHS3 compliance and does not affect electrical performance or compatibility.

Q: Are there any package compatibility concerns?

A: No. Both the LM2733XMF and LM2733XMF/NOPB use the SC-74A (SOT-753) surface mount package with identical pinout and footprint. PCB layouts and assembly processes require no modification.

Q: Why is the original LM2733XMF in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing production. The LM2733XMF/NOPB remains in Active status and is the recommended long-term supply source.

Q: Are compliance certifications identical between the two parts?

A: Yes. Both parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity levels (MSL 1 - Unlimited). No compliance differences exist between the parts.