LP2960IM-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP2960IM-3.3/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed to deliver a fixed 3.3V output at 500mA. This device operates as a positive fixed regulator with integrated protection features including over-current, over-temperature, and reverse polarity protection. The part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity. The 16-SOIC package and comprehensive protection architecture define its application scope in power management circuits requiring regulated 3.3V rails.

Substiute Parts

LP2960IM-3.3/NOPB

Texas InstrumentsIn Stock: 1163LP2960IM-3.3/NOPB Datasheet

Current PartRFQ

MIC5239-3.3YM

Microchip TechnologyIn Stock: 46741MIC5239-3.3YM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2960IM-3.3/NOPB is determined by the following critical electrical and mechanical parameters:

• Output Voltage: Must be fixed at 3.3V
• Output Current Capability: Minimum 500mA required
• Input Voltage Range: Maximum input voltage of 30V or greater
• Output Configuration: Positive fixed regulator topology
• Protection Features: Over-current and over-temperature protection mandatory
• Operating Temperature Range: -40°C to 125°C minimum
• Regulatory Compliance: ROHS3 compliance required

The MIC5239-3.3YM qualifies as a direct substitute based on matching all critical electrical parameters. While the package differs (8-SOIC versus 16-SOIC), both packages maintain the same 0.154" (3.90mm) width standard for SOIC form factors, allowing PCB layout compatibility with minor footprint adjustments.

Parameter Comparison

Engineering Selection Recommendations

The MIC5239-3.3YM is a qualified substitute for the obsolete LP2960IM-3.3/NOPB based on the following criteria:

Electrical Compatibility: Both devices deliver identical fixed 3.3V output at 500mA with matching 30V maximum input voltage ratings and identical operating temperature ranges (-40°C to 125°C). Both incorporate over-current, over-temperature, and reverse polarity protection.

Regulatory Compliance: The MIC5239-3.3YM maintains ROHS3 compliance, meeting the same environmental standards as the original part.

Product Status Advantage: The MIC5239-3.3YM is classified as active, ensuring long-term availability and continued manufacturing support, whereas the LP2960IM-3.3/NOPB is obsolete.

Package Consideration: The MIC5239-3.3YM uses an 8-SOIC package compared to the 16-SOIC of the original part. Both maintain the standard 0.154" (3.90mm) SOIC width. PCB layout modification is required to accommodate the reduced pin count and smaller footprint.

Performance Enhancement: The MIC5239-3.3YM demonstrates superior performance characteristics with lower typical dropout voltage (0.35V versus 0.8V) and significantly reduced quiescent current (45 µA versus 600 µA), resulting in improved thermal efficiency and reduced power dissipation.

Frequently Asked Questions (FAQ)

Q: Can the MIC5239-3.3YM directly replace the LP2960IM-3.3/NOPB without PCB modifications?

A: The MIC5239-3.3YM requires PCB layout modifications due to package differences. The original part uses a 16-SOIC package while the substitute uses an 8-SOIC package. Although both maintain the same 0.154" width standard, the pin count and spacing differ, necessitating footprint redesign.

Q: Are the electrical specifications identical between these two parts?

A: The critical electrical specifications match: both deliver 3.3V fixed output at 500mA with 30V maximum input voltage and -40°C to 125°C operating range. The MIC5239-3.3YM offers improved performance with lower dropout voltage and quiescent current, but these enhancements do not affect functional compatibility.

Q: What protection features are included in the MIC5239-3.3YM?

A: The MIC5239-3.3YM includes over-current, over-temperature, over-voltage, and reverse polarity protection. The original LP2960IM-3.3/NOPB includes over-current, over-temperature, and reverse polarity protection. The additional over-voltage protection in the substitute provides enhanced circuit protection.

Q: Is the MIC5239-3.3YM suitable for new designs?

A: Yes. The MIC5239-3.3YM is classified as active with extensive inventory availability. It is appropriate for both replacement of obsolete designs and new product development requiring 3.3V regulated output at 500mA.

Q: What are the moisture sensitivity differences between these parts?

A: The LP2960IM-3.3/NOPB has MSL 3 (168 Hours), while the MIC5239-3.3YM has MSL 2 (1 Year). The lower MSL rating of the substitute indicates superior moisture resistance and extended shelf life.