MIC39300-1.8BU TR Equivalent & Substitute Parts

Part Overview

The MIC39300-1.8BU TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output at 3A in a TO-263-3 surface mount package. This device provides regulated power with integrated protection features including over-current, over-temperature, and reverse polarity protection across an operating temperature range of -40°C to 125°C.

The MIC39300-1.8BU 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 utilizing this regulator.

Substiute Parts

MIC39300-1.8BU TR

Microchip TechnologyIn Stock: 1115MIC39300-1.8BU TR Datasheet

Current PartRFQ

MIC39300-1.8WU-TR

Microchip TechnologyIn Stock: 1075MIC39300-1.8WU-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC39300-1.8BU TR are identified based on electrical and mechanical parameter equivalence. The critical parameters determining substitutability are:

• Fixed output voltage of 1.8V
• Output current rating of 3A
• Maximum input voltage of 16V
• Voltage dropout specification of 0.55V @ 3A
• TO-263-3 package configuration
• Surface mount mounting type
• Operating temperature range of -40°C to 125°C
• Identical protection feature set (Over Current, Over Temperature, Reverse Polarity)

The MIC39300-1.8WU-TR meets all these electrical and mechanical requirements, making it a parametric equivalent suitable for direct substitution in applications currently using the MIC39300-1.8BU TR.

Parameter Comparison

Engineering Selection Recommendations

The MIC39300-1.8WU-TR is the direct substitute for the obsolete MIC39300-1.8BU TR. Both parts are manufactured by Microchip Technology and share identical electrical specifications and package configurations.

The primary distinction between these parts is product status and compliance certification. The MIC39300-1.8BU TR is obsolete, while the MIC39300-1.8WU-TR maintains active product status with current manufacturing support. Additionally, the MIC39300-1.8WU-TR is ROHS3 compliant, whereas the MIC39300-1.8BU TR is RoHS non-compliant. Both parts maintain identical moisture sensitivity levels and REACH unaffected status.

For new designs or ongoing production requiring 1.8V/3A linear regulation in TO-263-3 packaging, the MIC39300-1.8WU-TR is the appropriate selection due to its active status and regulatory compliance.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts share identical electrical specifications including output voltage, current rating, input voltage limits, dropout voltage, operating temperature range, and protection features. The TO-263-3 package configuration is identical, enabling direct PCB-level substitution without design modification.

Q: What is the significance of the product status difference between these parts?

A: The MIC39300-1.8BU TR is classified as obsolete, indicating discontinued manufacturing and limited availability. The MIC39300-1.8WU-TR maintains active product status with ongoing manufacturing support and current inventory availability, ensuring long-term supply chain reliability.

Q: Does the RoHS compliance difference affect substitution compatibility?

A: RoHS compliance status reflects manufacturing process standards and material composition. The electrical and mechanical performance of both parts remains equivalent. Selection between these parts should consider your application's regulatory requirements and supply chain compliance mandates.

Q: Are the moisture sensitivity levels identical?

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

Q: What parameters must remain constant for substitution validity?

A: Output voltage (1.8V), output current (3A), input voltage maximum (16V), voltage dropout (0.55V @ 3A), package type (TO-263-3), and protection features (Over Current, Over Temperature, Reverse Polarity) must all match for direct substitution.