LM2733XMFX Equivalent & Substitute Parts

Part Overview

The LM2733XMFX 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.

The LM2733XMFX carries an obsolete product status. Identifying qualified substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM2733XMFX

Texas InstrumentsIn Stock: 37829LM2733XMFX Datasheet

Current PartRFQ

LM2733XMFX/NOPB

Texas InstrumentsIn Stock: 29353LM2733XMFX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2733XMFX is determined by strict equivalence across the following critical parameters:

• Functional topology: Step-up (boost) configuration with positive adjustable output
• Electrical specifications: Input voltage range (2.7V–14V), output voltage range (2.7V–40V), output current (1A switch), and switching frequency (1.6MHz)
• Package compatibility: SC-74A (SOT-753) surface mount package with SOT-23-5 pin configuration
• Operating temperature range: -40°C to 125°C junction temperature
• Output configuration: Single positive adjustable output

The LM2733XMFX/NOPB is a direct manufacturer equivalent that maintains identical electrical and mechanical specifications while offering active product status and current compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM2733XMFX/NOPB is a direct functional and pin-compatible substitute for the obsolete LM2733XMFX. Both parts share identical electrical performance specifications and package geometry. The primary distinction is product lifecycle status: the LM2733XMFX/NOPB maintains active manufacturing status with current availability.

For new designs or component replenishment, the LM2733XMFX/NOPB is the appropriate selection. It provides ROHS3 compliance, addressing regulatory requirements that the original LM2733XMFX does not meet. Both parts maintain equivalent moisture sensitivity levels and export classifications.

Frequently Asked Questions (FAQ)

Q: Can LM2733XMFX/NOPB be used as a direct replacement for LM2733XMFX?

A: Yes. The LM2733XMFX/NOPB is electrically and mechanically identical to the LM2733XMFX. Pin configuration, package footprint, and all electrical specifications are equivalent. No circuit modifications are required.

Q: What is the difference between LM2733XMFX and LM2733XMFX/NOPB?

A: The primary differences are product status and compliance certification. The LM2733XMFX is obsolete, while LM2733XMFX/NOPB is active. The LM2733XMFX/NOPB carries ROHS3 compliance; the original does not. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: Both parts use the SC-74A (SOT-753) surface mount package with SOT-23-5 pin configuration. Packaging format availability differs: LM2733XMFX/NOPB is supplied in Cut Tape (CT) and Digi-Reel formats, supporting standard manufacturing processes.

Q: What compliance certifications apply to the LM2733XMFX/NOPB?

A: The LM2733XMFX/NOPB is ROHS3 compliant and REACH unaffected. Both parts carry EAR99 export classification and HTSUS code 8542.39.0001.

Q: Is the LM2733XMFX/NOPB suitable for designs requiring RoHS compliance?

A: Yes. The LM2733XMFX/NOPB meets ROHS3 requirements. If your application requires RoHS compliance, this part is the appropriate selection over the non-compliant LM2733XMFX.