MIC37302BU TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MIC37302BU TR is a linear voltage regulator IC from Microchip Technology designed for positive adjustable output applications. This surface-mount device delivers 3A output current in a TO-263-5 package configuration and includes integrated protection features for over-current, over-temperature, and reverse polarity conditions.

The MIC37302BU TR carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and improved compliance certifications.

Substiute Parts

MIC37302BU TR

Microchip TechnologyIn Stock: 1236MIC37302BU TR Datasheet

Current PartRFQ

MIC37302WU-TR

Microchip TechnologyIn Stock: 50929MIC37302WU-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC37302BU TR is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Output configuration (Positive)
• Output type (Adjustable)
• Voltage input maximum (6V)
• Voltage output range (1.24V to 5.5V)
• Output current rating (3A)
• Control features (Enable function)
• Protection features (Over Current, Over Temperature, Reverse Polarity)
• Operating temperature range (-40°C to 125°C)

Mechanical Equivalence Criteria:

• Mounting type (Surface Mount)
• Package classification (TO-263-5 supplier device package)
• Physical form factor (TO-263-6, D2PAK with 5 Leads + Tab)

Compliance Considerations:

• RoHS status and certification level
• Moisture sensitivity level (MSL 3)
• REACH and ECCN classifications

The MIC37302WU TR meets all electrical and mechanical equivalence criteria and represents a direct substitute with improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The MIC37302WU TR is a direct functional equivalent to the MIC37302BU TR. Both parts share identical electrical specifications, output characteristics, protection features, and thermal operating range. The primary distinction is product lifecycle status and regulatory compliance.

The MIC37302BU TR is classified as obsolete, indicating discontinued manufacturing and limited availability. The MIC37302WU TR maintains active product status with significantly higher inventory availability (50,850 pieces versus 1,147 pieces).

From a compliance perspective, the MIC37302WU TR carries ROHS3 certification, whereas the MIC37302BU TR is non-compliant. Both parts maintain equivalent REACH and ECCN classifications. The MSL rating remains consistent at Level 3 across both variants.

For new designs or component replenishment, the MIC37302WU TR is the appropriate selection. For legacy system maintenance requiring exact part matching, the MIC37302BU TR remains functionally interchangeable where supply permits.

Frequently Asked Questions (FAQ)

Q: Can the MIC37302WU TR replace the MIC37302BU TR in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical output voltage ranges (1.24V to 5.5V), current rating (3A), protection features, and operating temperature specifications (-40°C to 125°C). The TO-263-5 package configuration is identical.

Q: What is the primary reason to transition from MIC37302BU TR to MIC37302WU TR?

A: The MIC37302BU TR is obsolete with limited inventory. The MIC37302WU TR is in active production with substantially higher availability. Additionally, the MIC37302WU TR meets ROHS3 compliance requirements, whereas the MIC37302BU TR does not.

Q: Are there packaging differences between these parts?

A: Both parts use the TO-263-5 supplier device package configuration. The physical form factor (TO-263-6, D2PAK with 5 Leads + Tab) is identical. Packaging format differs only in distribution method: the MIC37302BU TR is supplied in Tape & Reel (TR), while the MIC37302WU TR is available in Cut Tape (CT) and Digi-Reel formats.

Q: Do these parts require different PCB layouts or thermal management approaches?

A: No. Identical package specifications and thermal characteristics mean PCB layout, footprint, and thermal design remain unchanged between parts.

Q: What is the MSL rating, and does it differ between these parts?

A: Both parts carry MSL Level 3 with a 168-hour floor life. Moisture sensitivity handling and storage requirements are identical.

Q: Are there compliance or certification differences?

A: The MIC37302WU TR is ROHS3 compliant. The MIC37302BU TR is non-compliant. Both maintain equivalent REACH Unaffected status and EAR99 ECCN classification.