MIC29303BU Equivalent & Substitute Parts

Part Overview

The MIC29303BU 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. The part is classified as Obsolete, making identification of suitable alternatives essential for ongoing design support and procurement planning. The MIC29303BU provides adjustable output voltage regulation from 1.25V to 25V with integrated protection features including over-current, over-temperature, reverse polarity, and transient voltage protection.

Substiute Parts

MIC29303BU

Microchip TechnologyIn Stock: 2095MIC29303BU Datasheet

Current PartRFQ

MIC29303WU

Microchip TechnologyIn Stock: 2338MIC29303WU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC29303BU is determined by strict equivalence across the following critical parameters:

• Output Configuration: Positive
• Output Type: Adjustable
• Number of Regulators: 1
• Voltage - Input (Max): 26V
• Voltage - Output (Min/Fixed): 1.25V
• Voltage - Output (Max): 25V
• Voltage Dropout (Max): 0.6V @ 3A
• Current - Output: 3A
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
• Supplier Device Package: TO-263-5
• Base Product Number: MIC29303

The MIC29303WU qualifies as a direct substitute based on complete alignment with all electrical and mechanical parameters specified above.

Parameter Comparison

Engineering Selection Recommendations

The MIC29303WU is the direct equivalent substitute for the MIC29303BU. Both parts share identical electrical specifications and mechanical packaging. The primary distinction is product lifecycle status: the MIC29303BU is Obsolete while the MIC29303WU maintains Active status with current manufacturing support.

The MIC29303WU additionally carries ROHS3 compliance certification, whereas the MIC29303BU is RoHS non-compliant. Both parts maintain REACH Unaffected status and identical ECCN and HTSUS classifications. For new designs or ongoing procurement requirements, the MIC29303WU is the appropriate selection due to its active product status and enhanced regulatory compliance posture.

Frequently Asked Questions (FAQ)

Q: Can MIC29303WU directly replace MIC29303BU in existing designs?

A: Yes. The MIC29303WU is electrically and mechanically equivalent to the MIC29303BU across all specified parameters including voltage ratings, current capacity, dropout voltage, operating temperature range, and TO-263-5 package configuration.

Q: What is the primary reason to transition from MIC29303BU to MIC29303WU?

A: The MIC29303BU is classified as Obsolete. The MIC29303WU maintains Active product status with ongoing manufacturing availability. Additionally, the MIC29303WU carries ROHS3 compliance certification.

Q: Are there packaging differences between these parts?

A: Both parts use identical Surface Mount packaging: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA configuration with TO-263-5 supplier device package designation. No PCB layout modifications are required for substitution.

Q: Do thermal and environmental specifications differ?

A: No. Both parts operate across the identical temperature range of -40°C to 125°C and share the same Moisture Sensitivity Level (MSL) rating of 3 (168 Hours).

Q: Are there compliance or certification differences?

A: The MIC29303WU is ROHS3 compliant while the MIC29303BU is RoHS non-compliant. Both maintain REACH Unaffected status. Regulatory requirements for your application will determine which certification status is necessary.