MIC3975-3.3BMM Equivalent & Substitute Parts

Part Overview

The MIC3975-3.3BMM is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3.3V output applications with 750mA current capacity. This Surface Mount device in 8-MSOP packaging provides regulated power with integrated protection features including over-current, over-temperature, and reverse polarity protection. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

MIC3975-3.3BMM

Microchip TechnologyIn Stock: 702MIC3975-3.3BMM Datasheet

Current PartRFQ

MIC3975-3.3YMM

Microchip TechnologyIn Stock: 1423MIC3975-3.3YMM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MIC3975-3.3BMM can be substituted with MIC3975-3.3YMM based on the following substitution criteria:

Identical Electrical Parameters:

• Output voltage: 3.3V fixed
• Output current: 750mA
• Input voltage maximum: 16V
• Voltage dropout: 0.5V @ 750mA
• Operating temperature range: -40°C ~ 125°C
• Protection features: Over Current, Over Temperature, Reverse Polarity
• Control features: Enable function

Identical Mechanical Parameters:

• Package type: 8-MSOP (0.118", 3.00mm Width)
• Mounting type: Surface Mount
• Base product number: MIC3975

Functional Equivalence: Both parts are linear voltage regulators with identical electrical specifications and mechanical form factors. The substitution is valid for all applications requiring these specific parameters.

Parameter Comparison

Engineering Selection Recommendations

The MIC3975-3.3YMM is the direct substitute for the discontinued MIC3975-3.3BMM. Selection between these parts should be based on the following factors:

Product Availability: The MIC3975-3.3YMM is currently active with 1313 pieces in stock, while the MIC3975-3.3BMM is discontinued. For new designs and ongoing production, the MIC3975-3.3YMM is the appropriate choice.

Regulatory Compliance: The MIC3975-3.3YMM meets ROHS3 compliance requirements, whereas the MIC3975-3.3BMM is RoHS non-compliant. Applications subject to RoHS regulations must use the MIC3975-3.3YMM.

Electrical and Mechanical Equivalence: Both parts are electrically and mechanically identical, ensuring direct pin-for-pin and functional compatibility in all circuit applications.

Packaging Considerations: The MIC3975-3.3BMM is supplied in bulk packaging, while the MIC3975-3.3YMM is supplied in tube packaging. Tube packaging provides better component protection during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can MIC3975-3.3YMM replace MIC3975-3.3BMM in existing designs?

A: Yes. Both parts have identical electrical specifications, output voltage (3.3V), output current (750mA), input voltage rating (16V max), voltage dropout (0.5V @ 750mA), operating temperature range (-40°C ~ 125°C), and protection features. They share the same 8-MSOP package and mounting type, making them direct functional equivalents.

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

A: The primary differences are product status and compliance. The MIC3975-3.3YMM is currently active with ROHS3 compliance, while the MIC3975-3.3BMM is discontinued and RoHS non-compliant. The packaging format also differs: bulk versus tube. Electrically and mechanically, they are identical.

Q: Are there any circuit design changes required when switching from MIC3975-3.3BMM to MIC3975-3.3YMM?

A: No circuit design changes are required. The parts are pin-for-pin compatible with identical electrical characteristics, including output voltage, current capacity, dropout voltage, and protection features.

Q: What is the 8-MSOP package specification?

A: The 8-MSOP (8-pin Micro Small Outline Package) has a width of 0.118 inches (3.00mm). This is a Surface Mount package suitable for automated assembly on PCBs.

Q: Why is the MIC3975-3.3BMM discontinued?

A: Product discontinuation decisions are made by manufacturers based on market demand and product lifecycle management. The MIC3975-3.3YMM remains active and serves the same application requirements.

Q: Are both parts suitable for industrial temperature applications?

A: Yes. Both parts operate across the -40°C ~ 125°C temperature range, which covers industrial and extended temperature requirements.