MIC39500-2.5BU TR Equivalent & Substitute Parts

Part Overview

The MIC39500-2.5BU TR is a linear voltage regulator IC from Microchip Technology, classified as a Power Management (PMIC) component. It delivers a fixed 2.5V output at 5A maximum current in a TO-263-3 surface mount package. The device incorporates over-current, over-temperature, and reverse polarity protection, operating across the industrial temperature range of -40°C to 125°C.

This part is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

MIC39500-2.5BU TR

Microchip TechnologyIn Stock: 828MIC39500-2.5BU TR Datasheet

Current PartRFQ

MIC39500-2.5WU-TR

Microchip TechnologyIn Stock: 1220MIC39500-2.5WU-TR 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 TR are identified based on the following critical parameters that determine functional compatibility:

• Output Voltage: Fixed 2.5V output (exact match required)
• Package Type: TO-263-3 surface mount package (mechanical and thermal compatibility)
• Operating Temperature Range: -40°C to 125°C (environmental specification match)
• Protection Features: Over-current and reverse polarity protection (minimum safety requirements)
• Input Voltage Rating: Maximum 16V (system compatibility)

Substitute parts may vary in maximum output current capacity and dropout voltage characteristics, provided the application's current requirements do not exceed the substitute part's rating. Parts are grouped by their relationship to the main part: direct manufacturer equivalents (same manufacturer, active status) and manufacturer-recommended alternatives (different manufacturer, active status).

Parameter Comparison

Engineering Selection Recommendations

MIC39500-2.5WU-TR (Microchip Technology) is the primary substitute for the obsolete MIC39500-2.5BU TR. Both parts are manufactured by Microchip Technology and share identical electrical specifications: 2.5V fixed output, 5A maximum current, 0.575V dropout voltage at rated current, and TO-263-3 packaging. The MIC39500-2.5WU-TR carries active product status and is RoHS3 compliant, providing improved regulatory compliance and supply chain availability compared to the obsolete original part.

SPX29300T-L-2-5/TR (MaxLinear, Inc.) is a manufacturer-recommended alternative suitable for applications where output current requirements do not exceed 3A. This part maintains the same 2.5V output voltage, TO-263-3 package, and operating temperature range. The SPX29300T-L-2-5/TR exhibits higher dropout voltage (0.8V @ 3A) and includes transient voltage protection in addition to over-current and reverse polarity protection. This part is active and RoHS compliant.

Selection between these substitutes depends on application current requirements. For designs requiring the full 5A output capacity, MIC39500-2.5WU-TR is the appropriate choice. For applications with maximum current demands of 3A or less, SPX29300T-L-2-5/TR provides an alternative with active product status and full regulatory compliance.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts are manufactured by Microchip Technology and share identical electrical specifications: 2.5V output, 5A maximum current, 0.575V dropout voltage, and TO-263-3 packaging. The MIC39500-2.5WU-TR is the active production equivalent of the obsolete MIC39500-2.5BU TR.

Q: What is the key limitation of SPX29300T-L-2-5/TR as a substitute?

A: The SPX29300T-L-2-5/TR has a maximum output current rating of 3A, compared to 5A for the original part. This part is suitable only for applications where the design current requirement does not exceed 3A. Additionally, the dropout voltage is higher at 0.8V @ 3A.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All three parts use the TO-263-3 package (D2PAK with 3 leads plus tab), ensuring mechanical and thermal compatibility with existing PCB designs. Pin configuration and thermal characteristics are equivalent across all parts.

Q: What are the compliance differences between the original and substitute parts?

A: The MIC39500-2.5BU TR is RoHS non-compliant. Both substitute parts are RoHS compliant: MIC39500-2.5WU-TR is RoHS3 compliant, and SPX29300T-L-2-5/TR is RoHS compliant. All three parts are REACH unaffected and carry EAR99 ECCN classification.

Q: Can these parts be used interchangeably in production?

A: MIC39500-2.5WU-TR can be used as a direct interchangeable replacement. SPX29300T-L-2-5/TR requires design verification to confirm that the application's maximum current requirement does not exceed 3A and that the higher dropout voltage (0.8V vs. 0.575V) is acceptable for the system's input voltage margin.