MIC29501-3.3BU TR Equivalent & Substitute Parts

Part Overview

The MIC29501-3.3BU TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3.3V output at 5A in a TO-263-5 surface mount package. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The regulator incorporates integrated protection features including over-current, over-temperature, reverse polarity, and transient voltage protection, with an enable control feature for power management applications.

Substiute Parts

MIC29501-3.3BU TR

Microchip TechnologyIn Stock: 1440MIC29501-3.3BU TR Datasheet

Current PartRFQ

MIC29501-3.3WU-TR

Microchip TechnologyIn Stock: 845MIC29501-3.3WU-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC29501-3.3BU TR is determined by strict equivalence across the following critical parameters:

• Output voltage: 3.3V fixed
• Output current capability: 5A
• Maximum input voltage: 26V
• Package type: TO-263-5 (D2PAK)
• Mounting configuration: Surface mount
• Protection and control features: Over-current, over-temperature, reverse polarity, transient voltage protection with enable control
• Operating temperature range: -40°C to 125°C

The MIC29501-3.3WU-TR meets all substitution criteria as a direct functional equivalent from the same manufacturer and product family.

Parameter Comparison

Engineering Selection Recommendations

The MIC29501-3.3WU-TR is the direct substitute for the obsolete MIC29501-3.3BU TR. Both parts share identical electrical specifications and package configurations. The primary distinction is product lifecycle status: the MIC29501-3.3WU-TR maintains active production status with ROHS3 compliance certification, whereas the MIC29501-3.3BU TR is obsolete and RoHS non-compliant. For new designs or ongoing procurement requiring regulatory compliance, the MIC29501-3.3WU-TR is the appropriate selection. Both parts carry identical REACH unaffected and EAR99 ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Can the MIC29501-3.3WU-TR directly replace the MIC29501-3.3BU TR in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. Pin configuration, voltage output, current rating, protection features, and thermal characteristics are equivalent. Direct PCB substitution is possible without design modification.

Q: What is the difference between the BU and WU designations?

A: The designations indicate different product lifecycle stages and compliance certifications. The BU variant is obsolete and RoHS non-compliant. The WU variant is in active production with ROHS3 compliance. The electrical and mechanical specifications remain identical.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the TO-263-5 package (D2PAK with 5 leads plus tab). Pinout, lead spacing, and thermal pad configuration are identical.

Q: What protection features are included in both variants?

A: Both the MIC29501-3.3BU TR and MIC29501-3.3WU-TR include over-current protection, over-temperature protection, reverse polarity protection, and transient voltage protection. An enable control feature is integrated for power management applications.

Q: Is the MIC29501-3.3WU-TR suitable for applications requiring RoHS compliance?

A: Yes. The MIC29501-3.3WU-TR carries ROHS3 compliance certification. The obsolete MIC29501-3.3BU TR does not meet RoHS requirements.