MIC39301-2.5BT Equivalent & Substitute Parts

Part Overview

The MIC39301-2.5BT is a linear voltage regulator IC from Microchip Technology, designed to deliver a fixed 2.5V output at 3A in a TO-220-5 package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part provides positive fixed output regulation with integrated protection features including over-current, over-temperature, and reverse polarity protection, suitable for applications requiring stable low-voltage power delivery in through-hole configurations.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	3A
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.55V @ 3A
Operating Temperature Range	-40°C ~ 125°C
Package / Case	TO-220-5
Mounting Type	Through Hole
Protection Features	Over Current, Over Temperature, Reverse Polarity
Control Features	Enable

Substitute Part Grouping Explanation

Substitution for the MIC39301-2.5BT is determined by the following critical parameters: fixed 2.5V output voltage, 3A output current capability, TO-220-5 package compatibility, through-hole mounting, and integrated protection features (over-current, over-temperature, reverse polarity). All substitute parts must maintain these core electrical and mechanical specifications to ensure direct functional replacement without circuit redesign.

The substitute parts are grouped into two categories:

Direct Microchip Equivalent: MIC39301-2.5WT maintains identical electrical specifications and differs only in packaging format (Tube vs. unspecified for the original) and product status (Active vs. Obsolete).

Cross-Manufacturer Alternatives: LT1764ET-2.5#PBF and LT1764ET-2.5#06PBF from Analog Devices Inc. provide equivalent functionality with enhanced specifications in certain parameters while maintaining the same output voltage, current rating, package type, and protection features.

Parameter Comparison

Parameter	MIC39301-2.5BT	MIC39301-2.5WT	LT1764ET-2.5#PBF	LT1764ET-2.5#06PBF
Manufacturer	Microchip Technology	Microchip Technology	Analog Devices Inc.	Analog Devices Inc.
Output Voltage (Fixed)	2.5V	2.5V	2.5V	2.5V
Output Current	3A	3A	3A	3A
Input Voltage (Max)	16V	16V	20V	20V
Voltage Dropout (Max)	0.55V @ 3A	0.55V @ 3A	0.66V @ 3A	0.45V @ 3A
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C (TJ)	-40°C ~ 125°C
Package / Case	TO-220-5	TO-220-5	TO-220-5	TO-220-5
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity
Control Features	Enable	Enable	Enable	Enable
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MIC39301-2.5WT is the direct equivalent from Microchip Technology. This part maintains identical electrical performance to the MIC39301-2.5BT while offering the advantage of Active product status and ROHS3 compliance. Selection of this part is appropriate for designs requiring continuity with the original Microchip platform and where ROHS3 compliance is required.

LT1764ET-2.5#PBF and LT1764ET-2.5#06PBF from Analog Devices Inc. are cross-manufacturer alternatives that provide equivalent core functionality. Both parts support higher maximum input voltage (20V vs. 16V) and maintain identical output specifications. LT1764ET-2.5#06PBF offers superior dropout voltage performance (0.45V @ 3A vs. 0.55V @ 3A). All three substitute options are Active products with ROHS3 compliance, making them suitable for new designs and ongoing production where the MIC39301-2.5BT is no longer available.

Frequently Asked Questions (FAQ)

Q: Can MIC39301-2.5WT be used as a direct replacement for MIC39301-2.5BT?

A: Yes. MIC39301-2.5WT is electrically and mechanically identical to MIC39301-2.5BT, differing only in packaging format and product status. No circuit modifications are required.

Q: What are the key differences between Microchip and Analog Devices alternatives?

A: The LT1764ET series from Analog Devices supports higher maximum input voltage (20V vs. 16V). LT1764ET-2.5#06PBF provides lower dropout voltage (0.45V @ 3A). Both maintain the same 2.5V output, 3A current rating, TO-220-5 package, and protection features as the original MIC39301-2.5BT.

Q: Are all substitute parts pin-compatible with the original MIC39301-2.5BT?

A: Yes. All substitute parts use the TO-220-5 package with identical pinout, enabling direct board-level replacement without PCB modifications.

Q: Do the substitute parts meet current compliance standards?

A: Yes. MIC39301-2.5WT, LT1764ET-2.5#PBF, and LT1764ET-2.5#06PBF are all ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: Which substitute part should be selected for new designs?

A: MIC39301-2.5WT is recommended for designs prioritizing Microchip ecosystem continuity. LT1764ET-2.5#06PBF is recommended where lower dropout voltage performance is beneficial. All three options are Active products suitable for production use.

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