MIC39500-2.5WU-TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MIC39500-2.5WU-TR is an active linear voltage regulator IC manufactured by Microchip Technology, classified as a Power Management (PMIC) component. This device delivers a fixed positive output of 2.5V at 5A maximum current with a maximum dropout voltage of 0.575V at rated load. The part is housed in a TO-263-3 surface mount package and is currently in active production status with 1170 units available in new original inventory.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to supply constraints, inventory availability, or when application parameters permit operation within the electrical and mechanical tolerances of alternative devices.

Substiute Parts

MIC39500-2.5WU-TR

Microchip TechnologyIn Stock: 1220MIC39500-2.5WU-TR Datasheet

Current PartRFQ

SPX29300T-L-2-5/TR

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC39500-2.5WU-TR is determined by the following critical parameters:

• Fixed output voltage of 2.5V
• Maximum input voltage rating of 16V or greater
• Surface mount TO-263-3 package compatibility
• Operating temperature range of -40°C to 125°C
• Protection against over current and reverse polarity conditions
• Active product status and current manufacturing availability

The SPX29300T-L-2-5/TR qualifies as a substitute based on matching output voltage (2.5V fixed), input voltage rating (16V maximum), package type (TO-263-3), operating temperature range (-40°C to 125°C), and protection feature overlap. The primary electrical difference is the maximum output current rating of 3A versus 5A on the primary part.

Parameter Comparison

Engineering Selection Recommendations

Both the MIC39500-2.5WU-TR and SPX29300T-L-2-5/TR are active production devices with current manufacturing support. Both devices maintain RoHS compliance and identical moisture sensitivity classifications, ensuring equivalent handling and storage requirements.

Selection between these parts is determined by application current requirements. The MIC39500-2.5WU-TR supports continuous output current up to 5A, while the SPX29300T-L-2-5/TR is rated for maximum 3A output current. Applications requiring output current exceeding 3A must use the MIC39500-2.5WU-TR. Applications with maximum sustained current requirements of 3A or less may use either device.

The SPX29300T-L-2-5/TR provides transient voltage protection in addition to the over current and reverse polarity protection common to both devices. The MIC39500-2.5WU-TR includes over temperature protection.

Frequently Asked Questions (FAQ)

Q: Can the SPX29300T-L-2-5/TR replace the MIC39500-2.5WU-TR in all applications?

A: No. The SPX29300T-L-2-5/TR is limited to 3A maximum output current, while the MIC39500-2.5WU-TR supports 5A. Substitution is valid only when application load current does not exceed 3A.

Q: Are the packages physically identical?

A: Both devices use the TO-263-3 package (D2PAK with 3 leads plus tab). Pin configuration and PCB footprint are compatible.

Q: What is the difference in dropout voltage between these parts?

A: The MIC39500-2.5WU-TR exhibits 0.575V dropout at 5A load current. The SPX29300T-L-2-5/TR exhibits 0.8V dropout at 3A load current. Dropout voltage increases with load current for both devices.

Q: Do both parts require identical PCB layout considerations?

A: Both devices are surface mount components in the same package type with identical operating temperature ranges and moisture sensitivity levels. Standard linear regulator PCB layout practices apply to both.

Q: Are there differences in protection features that affect circuit design?

A: Both devices include over current and reverse polarity protection. The MIC39500-2.5WU-TR includes over temperature protection. The SPX29300T-L-2-5/TR includes transient voltage protection. These are internal protection mechanisms and do not require design changes for substitution within current rating limits.