MIC39500-2.5BU Equivalent & Substitute Parts

Part Overview

The MIC39500-2.5BU is a linear voltage regulator IC from Microchip Technology designed for positive fixed 2.5V output at 5A in a TO-263-3 surface mount package. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity. The regulator provides integrated protection features including over-current, over-temperature, and reverse polarity protection across an operating temperature range of -40°C to 125°C.

Substiute Parts

MIC39500-2.5BU

Microchip TechnologyIn Stock: 2173MIC39500-2.5BU Datasheet

Current PartRFQ

MIC39500-2.5WU

Microchip TechnologyIn Stock: 2317MIC39500-2.5WU Datasheet

DirectRFQ

SPX29300T-L-2-5/TR

MaxLinear, Inc.In Stock: 5497SPX29300T-L-2-5/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC39500-2.5BU are identified based on the following critical parameters that determine functional compatibility:

• Output voltage: 2.5V fixed
• Package type: TO-263-3 (D2PAK, 3 Leads + Tab)
• Output configuration: Positive
• Operating temperature range: -40°C to 125°C
• Protection features: Over-current and reverse polarity protection

Two substitute options are available. The MIC39500-2.5WU maintains identical electrical specifications while offering active product status and improved RoHS compliance. The SPX29300T-L-2-5/TR from MaxLinear provides functional substitution with the same output voltage and package, though with reduced output current capability (3A versus 5A) and slightly higher dropout voltage.

Parameter Comparison

Engineering Selection Recommendations

The MIC39500-2.5WU is the primary direct substitute for the MIC39500-2.5BU. Both parts are manufactured by Microchip Technology and share identical electrical specifications, including 5A output current and 0.575V maximum dropout voltage. The MIC39500-2.5WU offers the advantage of active product status and ROHS3 compliance, making it suitable for new designs and applications with RoHS requirements.

The SPX29300T-L-2-5/TR from MaxLinear serves as an alternative substitute when the 5A output current requirement can be reduced to 3A. This part maintains the same 2.5V output voltage, TO-263-3 package, and operating temperature range. The SPX29300T-L-2-5/TR includes transient voltage protection in addition to over-current and reverse polarity protection, and carries RoHS compliance certification. The higher dropout voltage (0.8V @ 3A) must be evaluated against application requirements.

Frequently Asked Questions (FAQ)

Q: Can the MIC39500-2.5WU be used as a direct replacement for the MIC39500-2.5BU?

A: Yes. The MIC39500-2.5WU is a direct substitute with identical electrical specifications, including 2.5V fixed output, 5A output current, 0.575V maximum dropout voltage, and TO-263-3 package. The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant).

Q: What are the limitations of using the SPX29300T-L-2-5/TR as a substitute?

A: The SPX29300T-L-2-5/TR has a reduced output current rating of 3A compared to the 5A capability of the MIC39500-2.5BU. Additionally, the dropout voltage is higher at 0.8V @ 3A versus 0.575V @ 5A. These differences must be evaluated against the specific application's power delivery and thermal requirements.

Q: Are all substitute parts available in the same package?

A: Yes. All three parts use the TO-263-3 package (D2PAK with 3 Leads + Tab), ensuring mechanical and thermal compatibility in existing PCB designs.

Q: What protection features are included in each part?

A: The MIC39500-2.5BU and MIC39500-2.5WU include over-current, over-temperature, and reverse polarity protection. The SPX29300T-L-2-5/TR includes over-current, reverse polarity, and transient voltage protection.

Q: Which substitute part should be selected for new designs?

A: The MIC39500-2.5WU is recommended for new designs requiring 5A output current and RoHS compliance. The SPX29300T-L-2-5/TR is suitable for applications where 3A output current is sufficient and alternative manufacturer sourcing is acceptable.