MIC39150-1.8BU Equivalent & Substitute Parts

Part Overview

The MIC39150-1.8BU is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output applications with 1.5A current capacity in a TO-263-3 surface mount package. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing production and maintenance applications. The MIC39150-1.8BU provides regulated 1.8V output with integrated protection features including over-current, over-temperature, and reverse polarity protection, operating across the industrial temperature range of -40°C to 125°C.

Substiute Parts

MIC39150-1.8BU

Microchip TechnologyIn Stock: 8722MIC39150-1.8BU Datasheet

Current PartRFQ

MIC39150-1.8WU

Microchip TechnologyIn Stock: 3870MIC39150-1.8WU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC39150-1.8BU is determined by strict equivalence across the following critical parameters:

• Output voltage specification: 1.8V fixed
• Maximum output current: 1.5A
• Maximum input voltage: 16V
• Voltage dropout: 0.5V @ 1.5A
• Package type: TO-263-3 (D2PAK)
• Surface mount configuration
• Protection features: Over-current, over-temperature, reverse polarity
• Operating temperature range: -40°C to 125°C

The MIC39150-1.8WU meets all electrical and mechanical specifications required for direct substitution. Both parts share identical base product number (MIC39150) and are manufactured by Microchip Technology with matching electrical characteristics and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The MIC39150-1.8WU is the direct substitute for the obsolete MIC39150-1.8BU. Both parts are electrically and mechanically identical across all specified parameters. The primary distinction is product status: the MIC39150-1.8BU is obsolete while the MIC39150-1.8WU is active and currently in production.

For new designs and ongoing production requiring 1.8V / 1.5A linear regulation in TO-263-3 packaging, the MIC39150-1.8WU is the appropriate selection. The MIC39150-1.8WU additionally provides ROHS3 compliance, meeting current environmental and regulatory requirements for component procurement.

Frequently Asked Questions (FAQ)

Q: Can the MIC39150-1.8WU directly replace the MIC39150-1.8BU in existing designs?

A: Yes. The MIC39150-1.8WU is electrically and mechanically equivalent to the MIC39150-1.8BU. Both parts deliver identical output voltage (1.8V), output current (1.5A), voltage dropout (0.5V @ 1.5A), and operate across the same temperature range (-40°C to 125°C). The TO-263-3 package pinout and footprint are identical, enabling direct PCB substitution without design modification.

Q: What is the difference between the MIC39150-1.8BU and MIC39150-1.8WU?

A: The primary differences are product status and packaging format. The MIC39150-1.8BU is obsolete, while the MIC39150-1.8WU is active and in current production. The MIC39150-1.8WU is supplied in tube packaging and meets ROHS3 compliance standards, whereas the MIC39150-1.8BU is RoHS non-compliant. All electrical specifications and performance characteristics are identical.

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

A: No. Both parts share identical thermal and electrical performance specifications. Maximum voltage dropout is 0.5V @ 1.5A for both variants. Operating temperature range, protection features (over-current, over-temperature, reverse polarity), and maximum input voltage (16V) are equivalent across both part numbers.

Q: What packaging options are available for these parts?

A: Both the MIC39150-1.8BU and MIC39150-1.8WU use the TO-263-3 surface mount package, also designated as D2PAK with 3 leads plus tab. This is the only package configuration available for these part numbers. The MIC39150-1.8WU is supplied in tube packaging format.

Q: Is the MIC39150-1.8WU suitable for new production designs?

A: Yes. The MIC39150-1.8WU is the active production part and is the appropriate choice for new designs. It provides current availability, ROHS3 compliance, and ongoing manufacturer support. For applications requiring 1.8V fixed output at 1.5A with integrated protection in a surface mount package, the MIC39150-1.8WU meets all specified requirements.