MIC29301-3.3BT Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MIC29301-3.3BT is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3.3V output applications with 3A current capacity in a TO-220-5 package. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement planning. The regulator provides integrated protection features including over-current, over-temperature, reverse polarity, and transient voltage protection, with an enable control feature for system-level power management.

Substiute Parts

MIC29301-3.3BT

Microchip TechnologyIn Stock: 3912MIC29301-3.3BT Datasheet

Current PartRFQ

MIC29301-3.3WT

Microchip TechnologyIn Stock: 2228MIC29301-3.3WT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC29301-3.3BT are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

• Fixed output voltage of 3.3V
• Output current rating of 3A minimum
• Maximum input voltage of 26V or greater
• TO-220-5 package configuration
• Through-hole mounting compatibility
• Operating temperature range of -40°C to 125°C or wider
• Identical protection feature set (Over Current, Over Temperature, Reverse Polarity, Transient Voltage)
• Enable control functionality

Parts meeting all these parameters are classified as direct substitutes regardless of product status or packaging variation.

Parameter Comparison

Engineering Selection Recommendations

The MIC29301-3.3WT serves as a direct electrical and mechanical substitute for the MIC29301-3.3BT. Both parts share identical electrical specifications, protection features, and package configuration. The primary distinction is product status and regulatory compliance.

The MIC29301-3.3WT is classified as active, ensuring continued manufacturer support and availability. This part carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for new designs and procurement cycles. The MIC29301-3.3BT, being obsolete and non-compliant with current RoHS standards, should be replaced with the MIC29301-3.3WT for all new applications and ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the MIC29301-3.3WT directly replace the MIC29301-3.3BT in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same output voltage, current rating, input voltage range, dropout voltage, package type, and protection features. Pin configuration and thermal characteristics are equivalent.

Q: What is the difference between the MIC29301-3.3BT and MIC29301-3.3WT?

A: The primary differences are product status and compliance certification. The MIC29301-3.3BT is obsolete and RoHS non-compliant. The MIC29301-3.3WT is active and ROHS3 compliant. Packaging format differs (standard versus tube), but electrical performance is identical.

Q: Why is the MIC29301-3.3BT obsolete?

A: Product obsolescence is determined by the manufacturer based on market demand and product lifecycle management. The active MIC29301-3.3WT variant provides continued support for this voltage regulator specification.

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

A: No. Both parts operate within the same temperature range (-40°C to 125°C) and deliver identical thermal and electrical performance characteristics.

Q: What packaging options are available?

A: The MIC29301-3.3BT uses standard packaging. The MIC29301-3.3WT is supplied in tube packaging. Both use the TO-220-5 package configuration for through-hole mounting.

Q: Is the MIC29301-3.3WT suitable for new product designs?

A: Yes. The MIC29301-3.3WT is the recommended choice for new designs. It is active, ROHS3 compliant, and provides the same electrical specifications as the obsolete MIC29301-3.3BT.