MIC39151-1.65BU Equivalent & Substitute Parts

Part Overview

The MIC39151-1.65BU is a linear voltage regulator IC from Microchip Technology designed for positive fixed output applications. This Surface Mount device delivers 1.5A output current at a fixed 1.65V output voltage with a maximum dropout voltage of 0.5V at rated current. The part is classified as Obsolete, making identification of suitable alternatives essential for ongoing system support and new design implementations.

Substiute Parts

MIC39151-1.65BU

Microchip TechnologyIn Stock: 2912MIC39151-1.65BU Datasheet

Current PartRFQ

MIC39151-1.65WU

Microchip TechnologyIn Stock: 8487MIC39151-1.65WU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MIC39151-1.65BU is determined by strict equivalence across the following critical parameters:

• Output voltage specification: 1.65V fixed
• Output current capability: 1.5A minimum
• Maximum input voltage: 16V or greater
• Package compatibility: TO-263-5 (D2PAK)
• Dropout voltage performance: 0.5V @ 1.5A or better
• Protection features: Over Current, Over Temperature, Reverse Polarity
• Operating temperature range: -40°C to 125°C
• Control features: Enable function

The MIC39151-1.65WU qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The MIC39151-1.65WU is the direct substitute for the obsolete MIC39151-1.65BU. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility.

The MIC39151-1.65WU offers the advantage of Active product status, indicating ongoing manufacturer support and availability. Additionally, the MIC39151-1.65WU meets ROHS3 compliance requirements, whereas the MIC39151-1.65BU is RoHS non-compliant. For applications requiring regulatory compliance with modern environmental standards, the MIC39151-1.65WU is the appropriate selection.

Both parts maintain identical Moisture Sensitivity Level (MSL 3, 168 Hours) and thermal operating range (-40°C to 125°C), confirming compatibility across storage, handling, and operational conditions.

Frequently Asked Questions (FAQ)

Q: Can the MIC39151-1.65WU directly replace the MIC39151-1.65BU in existing designs?

A: Yes. The MIC39151-1.65WU is electrically and mechanically identical to the MIC39151-1.65BU. Both parts feature the same output voltage (1.65V), output current (1.5A), dropout voltage (0.5V @ 1.5A), package configuration (TO-263-5), and protection features. Direct substitution requires no circuit modifications.

Q: What is the difference between the MIC39151-1.65BU and MIC39151-1.65WU?

A: The primary differences are product status and compliance certification. The MIC39151-1.65BU is Obsolete and RoHS non-compliant. The MIC39151-1.65WU is Active and ROHS3 compliant. All electrical and thermal specifications are identical.

Q: Why is the MIC39151-1.65BU listed as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support for this part number. The MIC39151-1.65WU represents the current production equivalent with identical functionality.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the TO-263-5 package (D2PAK with 5 Leads + Tab). Pinout and mechanical dimensions are identical, confirming direct board-level compatibility.

Q: What is the Moisture Sensitivity Level, and does it affect storage?

A: Both parts carry MSL 3 (168 Hours), indicating they can be exposed to moisture for up to 168 hours at 85°C/85% relative humidity before baking is required. Standard moisture control practices during storage and handling apply to both parts equally.

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both parts deliver identical voltage regulation, current capacity, and protection features.