MIC29201-3.3BU TR Equivalent & Substitute Parts

Part Overview

The MIC29201-3.3BU TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3.3V output applications with 400mA current capacity in a TO-263-5 surface mount package. This part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing production and design continuity. The MIC29201-3.3WU-TR serves as the parametric equivalent with identical electrical specifications and current product status.

Substiute Parts

MIC29201-3.3BU TR

Microchip TechnologyIn Stock: 909MIC29201-3.3BU TR Datasheet

Current PartRFQ

MIC29201-3.3WU-TR

Microchip TechnologyIn Stock: 643MIC29201-3.3WU-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC29201-3.3BU TR is determined by strict equivalence across the following critical parameters:

• Output voltage specification: 3.3V fixed
• Output current rating: 400mA
• Maximum input voltage: 26V
• Voltage dropout characteristics: 0.75V @ 400mA
• Quiescent current: 300 µA
• Package configuration: TO-263-5 surface mount
• Control and protection feature set: Enable control with Load Dump, Over Current, and Reverse Polarity protection
• Operating temperature range: -40°C ~ 125°C

The MIC29201-3.3WU-TR meets all these criteria as a parametric equivalent. The primary distinction between the main part and its substitute is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The MIC29201-3.3WU-TR is the direct substitute for the obsolete MIC29201-3.3BU TR. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The MIC29201-3.3WU-TR is currently in active production status, providing supply continuity and long-term availability.

For new designs or production transitions, the MIC29201-3.3WU-TR is the appropriate selection. This part carries ROHS3 compliance certification, meeting current environmental and regulatory requirements, whereas the original MIC29201-3.3BU TR does not. Both parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the MIC29201-3.3WU-TR be used as a direct replacement for the MIC29201-3.3BU TR?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including output voltage, current rating, dropout voltage, temperature range, and package configuration. Pin-to-pin compatibility is maintained.

Q: What is the primary difference between these two parts?

A: The MIC29201-3.3BU TR is obsolete, while the MIC29201-3.3WU-TR is active in production. Additionally, the MIC29201-3.3WU-TR carries ROHS3 compliance certification, whereas the original part is RoHS non-compliant.

Q: Are there any package or pinout differences?

A: No. Both parts use the TO-263-5 package configuration (D2PAK with 5 leads plus tab) and are supplied in Tape & Reel format. Pinout and mechanical dimensions are identical.

Q: What protection features are included in these regulators?

A: Both parts include Load Dump, Over Current, and Reverse Polarity protection. An Enable control feature is also provided for circuit management.

Q: What is the maximum input voltage these parts can handle?

A: The maximum input voltage for both parts is 26V. The voltage dropout at full 400mA load is 0.75V.

Q: Are there inventory considerations when selecting between these parts?

A: The MIC29201-3.3BU TR has 892 pieces in stock as new original inventory. The MIC29201-3.3WU-TR has 616 pieces available. For new production, the active MIC29201-3.3WU-TR is the recommended choice despite lower current inventory levels.