MIC39151-1.65BU TR Equivalent & Substitute Parts

Part Overview

The MIC39151-1.65BU TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed output applications. This Surface Mount device delivers 1.5A output current at a fixed 1.65V output voltage with integrated protection features including over-current, over-temperature, and reverse polarity protection. The part is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

MIC39151-1.65BU TR

Microchip TechnologyIn Stock: 883MIC39151-1.65BU TR Datasheet

Current PartRFQ

MIC39151-1.65WU-TR

Microchip TechnologyIn Stock: 1051MIC39151-1.65WU-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC39151-1.65BU TR is determined by strict equivalence across the following critical parameters:

• Output voltage specification: 1.65V fixed
• Maximum output current: 1.5A
• Maximum input voltage: 16V
• Voltage dropout: 0.5V @ 1.5A
• Package type: TO-263-5 (D2PAK with 5 leads plus tab)
• Protection features: Over-current, over-temperature, and reverse polarity protection
• Control features: Enable function
• Operating temperature range: -40°C ~ 125°C

The MIC39151-1.65WU-TR meets all electrical and mechanical specifications required for direct substitution. Both parts share identical base product number (MIC39151) and differ only in product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The MIC39151-1.65WU-TR is the direct functional equivalent of the MIC39151-1.65BU TR. Selection between these parts is determined by regulatory and compliance requirements rather than electrical performance.

For applications subject to RoHS3 compliance mandates, the MIC39151-1.65WU-TR is required. This part maintains active product status with Microchip Technology, ensuring continued availability and manufacturing support.

For legacy systems or applications without RoHS compliance requirements, the MIC39151-1.65BU TR remains functionally equivalent, though its obsolete status may limit future procurement options.

Both parts are identical in electrical characteristics, thermal performance, protection mechanisms, and package configuration. Pin-for-pin compatibility is confirmed across all functional and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can the MIC39151-1.65WU-TR be used as a direct replacement for the MIC39151-1.65BU TR?

A: Yes. Both parts deliver identical electrical performance, output voltage, current capacity, dropout voltage, and protection features. The TO-263-5 package configuration is identical, enabling direct pin-for-pin substitution without circuit modification.

Q: What is the primary difference between these two parts?

A: The MIC39151-1.65WU-TR is RoHS3 compliant and maintains active product status, while the MIC39151-1.65BU TR is RoHS non-compliant and classified as obsolete. Electrical and mechanical specifications are identical.

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

A: No. Both parts operate across the same temperature range (-40°C ~ 125°C), deliver 1.5A output current, and maintain 0.5V maximum dropout voltage at rated load. Thermal performance and protection mechanisms are equivalent.

Q: What package type is used for these regulators?

A: Both parts use the TO-263-5 package, also designated as D2PAK with 5 leads plus tab. This Surface Mount package is identical for both parts, confirming mechanical compatibility.

Q: Should I select the active or obsolete part for new designs?

A: For new designs, the MIC39151-1.65WU-TR is the appropriate selection due to its active product status and RoHS3 compliance. This ensures long-term availability and regulatory alignment.

Q: Are moisture sensitivity levels identical?

A: Yes. Both parts carry MSL 3 rating with 168-hour exposure limits, requiring identical handling and storage protocols.