LM2651MTC-3.3 Equivalent & Substitute Parts

Part Overview

The LM2651MTC-3.3 is a buck switching regulator IC from Texas Instruments designed for step-down voltage conversion. It delivers a fixed 3.3V output at 1.5A from input voltages ranging from 4V to 14V, operating at a switching frequency of 300kHz with integrated synchronous rectification. The main part number is currently listed as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement.

Substiute Parts

LM2651MTC-3.3

Texas InstrumentsIn Stock: 4258LM2651MTC-3.3 Datasheet

Current PartRFQ

LM2651MTC-3.3/NOPB

Texas InstrumentsIn Stock: 9499LM2651MTC-3.3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2651MTC-3.3 is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 1.5A
• Input voltage range of 4V to 14V
• Buck topology with synchronous rectification
• 16-TSSOP surface mount package
• Switching frequency of 300kHz
• Operating temperature range of -40°C to 125°C

The LM2651MTC-3.3/NOPB represents the direct equivalent part, sharing identical electrical specifications and package configuration. The primary distinction is product status and compliance certification, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The LM2651MTC-3.3/NOPB is the direct functional equivalent of the LM2651MTC-3.3. Both parts share identical electrical specifications, output characteristics, and package configuration. The substitute part offers the advantage of active product status and ROHS3 compliance certification, whereas the main part number is obsolete and non-compliant with current RoHS standards. For new designs or ongoing procurement requiring regulatory compliance, the LM2651MTC-3.3/NOPB is the appropriate selection. Both parts maintain equivalent moisture sensitivity levels and REACH compliance status.

Frequently Asked Questions (FAQ)

Q: Are the LM2651MTC-3.3 and LM2651MTC-3.3/NOPB electrically identical?

A: Yes. Both parts deliver identical electrical performance: 3.3V fixed output, 1.5A maximum output current, 4V to 14V input range, 300kHz switching frequency, and synchronous rectification. They are housed in the same 16-TSSOP package and operate across the same temperature range.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and compliance certification. The LM2651MTC-3.3 is obsolete and RoHS non-compliant. The LM2651MTC-3.3/NOPB is an active product with ROHS3 compliance. The "/NOPB" suffix indicates lead-free, halogen-free packaging.

Q: Can I use LM2651MTC-3.3/NOPB as a direct replacement in existing designs?

A: Yes. The LM2651MTC-3.3/NOPB is a direct pin-for-pin and functional equivalent. No circuit modifications are required for substitution.

Q: Are there inventory differences between these parts?

A: Yes. The LM2651MTC-3.3 has 4200 pieces in stock, while the LM2651MTC-3.3/NOPB has 9400 pieces available. The substitute part is supplied in tube packaging.

Q: Do both parts meet the same environmental and regulatory standards?

A: Both parts share identical REACH compliance status and moisture sensitivity levels. However, the LM2651MTC-3.3/NOPB meets ROHS3 compliance, whereas the main part does not.