MIC37301-1.8BR Equivalent & Substitute Parts

Part Overview

The MIC37301-1.8BR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output applications with 3A current capacity in S-PAK-5 surface mount packaging. This component is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The MIC37301-1.8BR remains available in inventory (2175 pcs) but sourcing from active product lines is recommended for long-term supply chain stability.

Substiute Parts

MIC37301-1.8BR

Microchip TechnologyIn Stock: 2211MIC37301-1.8BR Datasheet

Current PartRFQ

MIC37301-1.8WR

Microchip TechnologyIn Stock: 1486MIC37301-1.8WR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC37301-1.8BR is determined by strict equivalence across the following critical parameters:

• Output voltage: 1.8V fixed
• Output current capacity: 3A
• Input voltage maximum: 6V
• Package type: S-PAK-5 (5 Leads + Tab)
• Mounting type: Surface Mount
• Protection features: Over Current, Over Temperature, Reverse Polarity
• Operating temperature range: -40°C ~ 125°C
• Control features: Enable function

The MIC37301-1.8WR meets all substitution criteria as a direct equivalent from the same manufacturer base product line (MIC37301), maintaining identical electrical specifications and mechanical compatibility while offering active product status and improved compliance posture.

Parameter Comparison

Engineering Selection Recommendations

The MIC37301-1.8WR is the direct substitute for the MIC37301-1.8BR. Selection between these parts is determined by product lifecycle and compliance requirements:

Use MIC37301-1.8WR for new designs and ongoing production. This part carries active product status from Microchip Technology and meets ROHS3 compliance requirements, ensuring long-term availability and regulatory alignment with current environmental standards.

The MIC37301-1.8BR remains suitable for legacy system maintenance and repair applications where existing inventory is available. However, transition to the MIC37301-1.8WR is recommended to avoid future supply chain constraints associated with obsolete product classifications.

Both parts maintain identical electrical performance, thermal characteristics, and mechanical compatibility. No circuit redesign or board layout modification is required when transitioning between these variants.

Frequently Asked Questions (FAQ)

Q: Are MIC37301-1.8BR and MIC37301-1.8WR pin-compatible?

A: Yes. Both parts use identical S-PAK-5 (5 Leads + Tab) packaging with the same pinout configuration. Direct substitution on existing PCBs is possible without layout changes.

Q: What is the difference between the BR and WR suffix designations?

A: The suffix indicates packaging format and compliance revision. The BR variant is obsolete with non-compliant RoHS status. The WR variant is active with ROHS3 compliance and supplied in tube packaging.

Q: Can I use MIC37301-1.8BR inventory in new production?

A: Existing MIC37301-1.8BR inventory can be used for production, but transition to MIC37301-1.8WR is recommended to ensure compliance with current environmental regulations and to maintain supply chain continuity as the BR variant approaches end-of-life.

Q: Are the electrical specifications identical between these parts?

A: Yes. Output voltage (1.8V fixed), output current (3A), input voltage maximum (6V), operating temperature range (-40°C ~ 125°C), and all protection features (Over Current, Over Temperature, Reverse Polarity) are identical.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: Both parts carry MSL 3 rating with a 168-hour floor life. Standard moisture control procedures during storage and handling apply to both variants.

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

A: No thermal or performance differences exist. Both parts are from the same MIC37301 base product line with identical electrical characteristics and thermal performance specifications.