MIC39500-1.8BU TR Linear Voltage Regulator

Part Overview

The MIC39500-1.8BU TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output applications requiring 5A current capacity. This Surface Mount device in TO-263-3 package configuration provides regulated power with integrated protection features including over-current, over-temperature, and reverse polarity protection.

The MIC39500-1.8BU TR carries an Obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently utilizing this regulator.

Substiute Parts

MIC39500-1.8BU TR

Microchip TechnologyIn Stock: 903MIC39500-1.8BU TR Datasheet

Current PartRFQ

MIC39500-1.8WU-TR

Microchip TechnologyIn Stock: 1219MIC39500-1.8WU-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC39500-1.8BU TR is determined by strict equivalence across the following critical parameters:

• Output voltage specification: 1.8V fixed
• Maximum output current: 5A
• Maximum input voltage: 16V
• Voltage dropout characteristic: 0.575V @ 5A
• Package configuration: TO-263-3 (D2PAK)
• Mounting type: Surface Mount
• Protection features: Over Current, Over Temperature, Reverse Polarity
• Operating temperature range: -40°C ~ 125°C
• Manufacturer: Microchip Technology

The MIC39500-1.8WU-TR meets all electrical and mechanical parameters required for direct substitution. Both parts share identical base product number (MIC39500) and differ only in packaging designation and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The MIC39500-1.8WU-TR is the direct equivalent substitute for the obsolete MIC39500-1.8BU TR. Both parts deliver identical electrical performance and mechanical compatibility across all specified parameters.

The MIC39500-1.8WU-TR carries Active product status, ensuring ongoing manufacturer support and supply availability. This substitute also provides ROHS3 compliance, meeting current environmental and regulatory requirements, whereas the original part is RoHS non-compliant.

Selection of the MIC39500-1.8WU-TR eliminates obsolescence risk while maintaining full functional and physical compatibility with existing designs utilizing the MIC39500-1.8BU TR.

Frequently Asked Questions (FAQ)

Q: Can the MIC39500-1.8WU-TR directly replace the MIC39500-1.8BU TR without circuit modification?

A: Yes. Both parts are electrically and mechanically equivalent across all specified parameters including output voltage, current rating, input voltage range, dropout voltage, package configuration, and protection features. No circuit modifications are required.

Q: What is the primary difference between these two part numbers?

A: The MIC39500-1.8BU TR is classified as Obsolete, while the MIC39500-1.8WU-TR maintains Active product status. Additionally, the substitute part is ROHS3 compliant, whereas the original is RoHS non-compliant.

Q: Are the TO-263-3 packages physically identical?

A: Yes. Both parts use the TO-263-3 package configuration (D2PAK with 3 Leads + Tab), ensuring identical PCB footprint and mounting compatibility.

Q: What protection features are included in the substitute part?

A: The MIC39500-1.8WU-TR includes Over Current, Over Temperature, and Reverse Polarity protection, identical to the original part.

Q: Is the operating temperature range the same for both parts?

A: Yes. Both parts operate across the -40°C ~ 125°C temperature range with identical moisture sensitivity level (MSL 3, 168 Hours).