MIC39150-2.5BU TR Equivalent & Substitute Parts

Part Overview

The MIC39150-2.5BU TR 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 2.5V 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 design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Part Number	MIC39150-2.5BU TR
Category	Power Management (PMIC)
Output Voltage (Fixed)	2.5V
Output Current	1.5A
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.5V @ 1.5A
Package Type	TO-263-3 (D2PAK, 3 Leads + Tab)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity
Product Status	Obsolete
RoHS Status	RoHS Non-Compliant

Substitute Part Grouping Explanation

Substitution for the MIC39150-2.5BU TR is determined by the following critical parameters:

Output voltage specification: 2.5V fixed
Maximum input voltage: 16V
Package compatibility: TO-263-3 (D2PAK)
Operating temperature range: -40°C to 125°C
Protection features: Over Current and Reverse Polarity (minimum requirement)

Two substitute parts meet these criteria. The MIC39150-2.5WU-TR is a direct Microchip Technology equivalent with identical electrical specifications and Active product status. The SPX29300T-L-2-5/TR from MaxLinear, Inc. provides enhanced output current capability (3A versus 1.5A) while maintaining the same output voltage, input voltage range, package type, and operating temperature specifications.

Parameter Comparison

Parameter	MIC39150-2.5BU TR (Main)	MIC39150-2.5WU-TR (Direct Substitute)	SPX29300T-L-2-5/TR (Alternative)
Manufacturer	Microchip Technology	Microchip Technology	MaxLinear, Inc.
Output Voltage (Fixed)	2.5V	2.5V	2.5V
Output Current	1.5A	1.5A	3A
Input Voltage (Max)	16V	16V	16V
Dropout Voltage (Max)	0.5V @ 1.5A	0.5V @ 1.5A	0.8V @ 3A
Package Type	TO-263-3	TO-263-3	TO-263-3
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity	Over Current, Reverse Polarity, Transient Voltage
Product Status	Obsolete	Active	Active
RoHS Status	RoHS Non-Compliant	RoHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The MIC39150-2.5WU-TR is the primary substitute for the obsolete MIC39150-2.5BU TR. Both parts are manufactured by Microchip Technology and share identical electrical specifications, package configuration, and thermal characteristics. The MIC39150-2.5WU-TR carries Active product status and RoHS3 compliance, providing improved supply chain availability and regulatory alignment compared to the obsolete original part.

The SPX29300T-L-2-5/TR from MaxLinear, Inc. serves as an alternative substitute when higher output current capacity is required. This part doubles the available output current to 3A while maintaining the same 2.5V output voltage, 16V maximum input voltage, TO-263-3 package, and operating temperature range. The SPX29300T-L-2-5/TR includes transient voltage protection in addition to over current and reverse polarity protection. The increased dropout voltage specification (0.8V @ 3A versus 0.5V @ 1.5A) must be evaluated against system power supply headroom requirements.

Both substitute parts are RoHS compliant and carry Active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the MIC39150-2.5WU-TR be used as a direct replacement for the MIC39150-2.5BU TR?

A: Yes. The MIC39150-2.5WU-TR is a direct substitute with identical output voltage (2.5V), output current (1.5A), input voltage range (16V maximum), dropout voltage (0.5V @ 1.5A), package type (TO-263-3), and operating temperature range (-40°C to 125°C). Both parts provide the same protection features and thermal characteristics.

Q: What is the difference between the MIC39150-2.5WU-TR and SPX29300T-L-2-5/TR?

A: The primary difference is output current capacity. The MIC39150-2.5WU-TR delivers 1.5A, matching the original part specification. The SPX29300T-L-2-5/TR provides 3A output current. Both maintain the same 2.5V output voltage, 16V maximum input voltage, and TO-263-3 package. The SPX29300T-L-2-5/TR has a higher dropout voltage (0.8V @ 3A) and includes transient voltage protection.

Q: Are both substitute parts available in the same package as the original?

A: Yes. Both the MIC39150-2.5WU-TR and SPX29300T-L-2-5/TR use the TO-263-3 package (D2PAK with 3 leads plus tab), providing identical PCB footprint compatibility with the MIC39150-2.5BU TR.

Q: What are the RoHS compliance differences?

A: The original MIC39150-2.5BU TR is RoHS non-compliant. Both substitutes are RoHS compliant: the MIC39150-2.5WU-TR meets RoHS3 requirements, and the SPX29300T-L-2-5/TR meets RoHS requirements. This provides improved regulatory alignment for new designs and procurement.

Q: Should I select the SPX29300T-L-2-5/TR if my application only requires 1.5A output?

A: Selection depends on system requirements. If your design requires exactly 1.5A output current, the MIC39150-2.5WU-TR is the appropriate choice as it matches the original specification. The SPX29300T-L-2-5/TR is suitable when higher current capacity provides design margin or supports future application scaling. The increased dropout voltage (0.8V versus 0.5V) must be evaluated against available input voltage headroom.

Q: What is the moisture sensitivity level for these parts?

A: All three parts carry Moisture Sensitivity Level 3 (168 Hours), requiring controlled storage and handling conditions during assembly.

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