MIC39300-1.8BU Equivalent & Substitute Parts

Part Overview

The MIC39300-1.8BU is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output applications with 3A current capacity in a TO-263-3 surface mount package. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement planning. The MIC39300-1.8BU delivers regulated 1.8V output with 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

MIC39300-1.8BU

Microchip TechnologyIn Stock: 2016MIC39300-1.8BU Datasheet

Current PartRFQ

MIC39300-1.8WU

Microchip TechnologyIn Stock: 1805MIC39300-1.8WU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC39300-1.8BU is determined by the following critical parameters:

• Output voltage specification: 1.8V fixed
• Maximum output current: 3A
• Maximum input voltage: 16V
• Voltage dropout: 0.55V @ 3A
• Package type: TO-263-3 surface mount
• Protection features: Over-current, over-temperature, and reverse polarity protection
• Operating temperature range: -40°C to 125°C

The MIC39300-1.8WU qualifies as a direct substitute based on identical electrical specifications and package compatibility. The primary distinction between these parts is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The MIC39300-1.8WU is the direct substitute for the obsolete MIC39300-1.8BU. Both parts share identical electrical performance specifications, output voltage, current capacity, dropout voltage, and thermal operating range. The MIC39300-1.8WU maintains active product status with Microchip Technology, ensuring continued availability and technical support.

The MIC39300-1.8WU carries ROHS3 compliance certification, whereas the MIC39300-1.8BU is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the MIC39300-1.8WU is the appropriate selection. Both parts maintain equivalent REACH and ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Can the MIC39300-1.8WU directly replace the MIC39300-1.8BU in existing designs?

A: Yes. The MIC39300-1.8WU provides identical electrical specifications, output voltage, current capacity, dropout voltage, and thermal performance. Both parts use the same TO-263-3 package with equivalent pinout and mechanical dimensions. No circuit modifications are required.

Q: What is the primary reason to transition from MIC39300-1.8BU to MIC39300-1.8WU?

A: The MIC39300-1.8BU is classified as obsolete. The MIC39300-1.8WU maintains active product status, ensuring long-term availability, continued manufacturing support, and access to technical documentation from Microchip Technology.

Q: Are there compliance differences between these parts?

A: The MIC39300-1.8WU is ROHS3 compliant, while the MIC39300-1.8BU is RoHS non-compliant. Both parts maintain equivalent REACH and ECCN classifications. For applications requiring RoHS compliance, the MIC39300-1.8WU is the required selection.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both the MIC39300-1.8BU and MIC39300-1.8WU carry MSL 3 (168 Hours) classification, requiring identical handling and storage protocols.

Q: Are there packaging differences between these parts?

A: Both parts use the TO-263-3 surface mount package. The MIC39300-1.8BU is supplied in standard packaging, while the MIC39300-1.8WU is supplied in tube packaging. The electrical and mechanical specifications remain identical.