MIC39300-2.5WU-TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MIC39300-2.5WU-TR is an active linear voltage regulator IC manufactured by Microchip Technology, classified as a Power Management (PMIC) component. This device delivers a fixed positive output of 2.5V at 3A maximum current in a surface-mount TO-263-3 package. The part is currently in active production status with 7050 units in stock inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range. Alternative sources become necessary to ensure supply chain continuity, manage lead times, or optimize procurement strategies while maintaining identical functional performance in the target application.

Key Parameters

Parameter	Value	Unit
Output Voltage (Fixed)	2.5	V
Output Current	3	A
Input Voltage (Maximum)	16	V
Output Configuration	Positive Fixed	—
Number of Regulators	1	—
Package Type	TO-263-3 (D2PAK)	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-40 to 125	°C
Protection Features	Over Current, Over Temperature, Reverse Polarity	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	3 (168 Hours)	—

Substitute Part Grouping Explanation

Substitution eligibility for the MIC39300-2.5WU-TR is determined by strict equivalence across the following critical parameters:

Fixed output voltage of 2.5V
Output current rating of 3A minimum
Maximum input voltage of 16V or greater
Surface-mount TO-263-3 package configuration
Operating temperature range of -40°C to 125°C minimum
Positive fixed output configuration with single regulator
RoHS and REACH compliance status
Moisture sensitivity level MSL 3 or better

The SPX29300T-L-2-5/TR manufactured by MaxLinear, Inc. meets all substitution criteria. Both devices share identical electrical specifications for voltage output, current capacity, input voltage rating, package type, and thermal operating range. Both components maintain equivalent protection features and compliance certifications required for direct substitution in the target application circuit.

Parameter Comparison

Parameter	MIC39300-2.5WU-TR (Microchip)	SPX29300T-L-2-5/TR (MaxLinear)	Match Status
Output Voltage (Fixed)	2.5V	2.5V	Equivalent
Output Current	3A	3A	Equivalent
Input Voltage (Maximum)	16V	16V	Equivalent
Voltage Dropout (Maximum)	0.55V @ 3A	0.8V @ 3A	Compatible
Output Configuration	Positive Fixed	Positive Fixed	Equivalent
Number of Regulators	1	1	Equivalent
Package Type	TO-263-3 (D2PAK)	TO-263-3 (D2PAK)	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Operating Temperature Range	-40 to 125°C	-40 to 125°C	Equivalent
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Reverse Polarity, Transient Voltage	Compatible
RoHS Status	ROHS3 Compliant	RoHS Compliant	Equivalent
Moisture Sensitivity Level	MSL 3 (168 Hours)	MSL 3 (168 Hours)	Equivalent

Engineering Selection Recommendations

Both the MIC39300-2.5WU-TR and SPX29300T-L-2-5/TR are active production components with confirmed RoHS and REACH compliance. Selection between these devices should be based on:

Availability and lead time requirements within your supply chain. The MIC39300-2.5WU-TR currently maintains 7050 units in stock inventory, while the SPX29300T-L-2-5/TR maintains 5434 units in stock inventory.

Voltage dropout performance. The MIC39300-2.5WU-TR exhibits a maximum dropout voltage of 0.55V at 3A, while the SPX29300T-L-2-5/TR exhibits 0.8V at 3A. Applications requiring minimal input-to-output voltage differential should prioritize the Microchip device.

Protection feature set. The SPX29300T-L-2-5/TR includes transient voltage protection in addition to over current and reverse polarity protection, providing enhanced transient suppression capability.

Both devices are qualified for the full industrial temperature range of -40°C to 125°C and maintain identical moisture sensitivity classification. Pin-to-pin compatibility and PCB footprint equivalence are confirmed for direct substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the SPX29300T-L-2-5/TR replace the MIC39300-2.5WU-TR in existing designs without PCB modification?

A: Yes. Both devices utilize the TO-263-3 (D2PAK) package with identical pin configuration and footprint. Direct substitution is possible without PCB layout changes.

Q: What is the significance of the voltage dropout difference between these two regulators?

A: Voltage dropout is the minimum input-to-output voltage differential required for proper regulator operation. The MIC39300-2.5WU-TR requires 0.55V dropout at 3A, while the SPX29300T-L-2-5/TR requires 0.8V dropout at 3A. Applications with tight input voltage margins should account for this difference in power supply design.

Q: Are both devices suitable for the same operating temperature range?

A: Yes. Both the MIC39300-2.5WU-TR and SPX29300T-L-2-5/TR operate across the identical temperature range of -40°C to 125°C, meeting industrial and extended temperature specifications.

Q: What protection features are included in each device?

A: The MIC39300-2.5WU-TR includes over current, over temperature, and reverse polarity protection. The SPX29300T-L-2-5/TR includes over current, reverse polarity, and transient voltage protection. Both devices provide essential circuit protection; the SPX29300T-L-2-5/TR offers additional transient suppression capability.

Q: Are both parts RoHS compliant?

A: Yes. The MIC39300-2.5WU-TR is ROHS3 compliant, and the SPX29300T-L-2-5/TR is RoHS compliant. Both devices meet current environmental and regulatory requirements for electronic component manufacturing and use.

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

A: Both devices are classified as MSL 3 with a moisture exposure limit of 168 hours. Standard moisture control procedures during storage, handling, and assembly are required to maintain component reliability.

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