LM2733YMF Equivalent & Substitute Parts

Part Overview

The LM2733YMF is a boost switching regulator IC from Texas Instruments designed for step-up voltage conversion applications. It delivers positive adjustable output voltage with 1A switch current capability in a compact SC-74A (SOT-753) surface mount package. The device operates across a 2.7V to 14V input range with adjustable output voltage from 2.7V to 40V, making it suitable for battery-powered and low-voltage supply applications requiring voltage elevation.

The LM2733YMF carries a Last Time Buy product status, indicating this part number is being phased out. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for new production runs and long-term inventory planning.

Substiute Parts

LM2733YMF

Texas InstrumentsIn Stock: 5929LM2733YMF Datasheet

Current PartRFQ

LM2733YMF/NOPB

Texas InstrumentsIn Stock: 40425LM2733YMF/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2733YMF is determined by strict equivalence across the following critical parameters:

• Functional topology: Step-up (boost) switching regulator
• Output configuration: Positive adjustable voltage
• Input voltage range: 2.7V to 14V minimum and maximum
• Output voltage range: 2.7V to 40V adjustable
• Output current capability: 1A switch current
• Switching frequency: 600kHz
• Package type: SC-74A (SOT-753) / SOT-23-5
• Surface mount compatibility
• Operating temperature range: -40°C to 125°C
• Regulatory compliance: ROHS3, REACH Unaffected

Only parts matching all these parameters across input/output specifications, thermal range, and physical packaging qualify as direct substitutes. The LM2733YMF/NOPB variant from Texas Instruments meets these criteria as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

The LM2733YMF/NOPB is the manufacturer-recommended substitute for the LM2733YMF. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications. The primary distinction is product lifecycle status: the LM2733YMF is designated Last Time Buy, while the LM2733YMF/NOPB maintains Active status.

For new designs and production continuity, the LM2733YMF/NOPB is the appropriate selection. This part carries full ROHS3 compliance and REACH Unaffected certification, meeting current regulatory requirements. The Active product status ensures ongoing availability and support from Texas Instruments.

Both parts are pin-compatible and functionally equivalent, requiring no circuit modifications for substitution. The SOT-23-5 package footprint remains identical across both variants, allowing direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LM2733YMF/NOPB be used as a direct replacement for the LM2733YMF?

A: Yes. The LM2733YMF/NOPB is electrically and mechanically identical to the LM2733YMF. Both parts feature the same input/output voltage ranges, current ratings, switching frequency, and SC-74A (SOT-753) package. No circuit design changes are required for substitution.

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

A: The "/NOPB" suffix designates a part number variant without plumbum (lead-free) processing. This is a manufacturer designation that does not affect electrical performance or compatibility.

Q: Why is the LM2733YMF marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments is discontinuing this specific part number variant. The LM2733YMF/NOPB remains in Active production, providing a direct path for design migration and supply continuity.

Q: Are there any thermal or reliability differences between these parts?

A: No. Both parts operate across the identical temperature range (-40°C to 125°C junction temperature) and carry the same Moisture Sensitivity Level (MSL 1, Unlimited). Thermal and reliability characteristics are equivalent.

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

A: Yes. The parts are pin-compatible and functionally identical. Existing designs using the LM2733YMF can accept the LM2733YMF/NOPB without modification. Both parts meet ROHS3 and REACH compliance requirements.

Q: What is the minimum input voltage requirement for these regulators?

A: The minimum input voltage is 2.7V. The adjustable output voltage range extends from 2.7V to 40V, allowing for step-up conversion across this input specification.

Q: Is a synchronous rectifier integrated into these devices?

A: No. Both the LM2733YMF and LM2733YMF/NOPB use non-synchronous rectification. External diode selection is required for the boost converter topology.