MIC39301-2.5WT Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MIC39301-2.5WT is a linear voltage regulator IC manufactured by Microchip Technology, designed to deliver a fixed 2.5V output at 3A in a TO-220-5 package. This positive fixed output regulator is classified as active product status and is widely used in power management applications requiring stable low-voltage regulation with integrated protection features.

Alternative models become necessary when the primary part is unavailable, when supply chain constraints occur, or when design flexibility across compatible manufacturers is required while maintaining identical electrical and mechanical specifications.

Substiute Parts

MIC39301-2.5WT

Microchip TechnologyIn Stock: 1178MIC39301-2.5WT Datasheet

Current PartRFQ

LT1764ET-2.5#PBF

Analog Devices Inc.In Stock: 1369LT1764ET-2.5#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC39301-2.5WT is determined by the following critical parameters:

• Fixed output voltage of 2.5V
• Output current capability of 3A minimum
• TO-220-5 package configuration for mechanical and thermal compatibility
• Positive output configuration
• Single regulator topology
• Enable control feature
• Over Current, Over Temperature, and Reverse Polarity protection
• Operating temperature range of -40°C to 125°C
• ROHS3 compliance and active product status

The substitute part LT1764ET-2.5#PBF meets all these criteria, with the exception of a higher maximum input voltage specification (20V versus 16V) and slightly higher dropout voltage (0.66V @ 3A versus 0.55V @ 3A). These differences do not prevent substitution in applications where the MIC39301-2.5WT operates within its specified input voltage range.

Parameter Comparison

Engineering Selection Recommendations

Both the MIC39301-2.5WT and LT1764ET-2.5#PBF are active products with ROHS3 compliance and REACH unaffected status, making them suitable for current design implementations and long-term supply chain planning.

The MIC39301-2.5WT is the primary selection when the application operates within its 16V maximum input voltage specification and when the lower dropout voltage of 0.55V @ 3A provides thermal or efficiency advantages.

The LT1764ET-2.5#PBF serves as a direct substitute when the MIC39301-2.5WT is unavailable. Its higher maximum input voltage rating of 20V provides additional design margin in applications with variable input sources. The slightly higher dropout voltage of 0.66V @ 3A remains within acceptable limits for most 2.5V regulation applications.

Both parts maintain identical output voltage, current capability, package configuration, protection features, and operating temperature range, ensuring functional equivalence in circuit design.

Frequently Asked Questions (FAQ)

Q: Can LT1764ET-2.5#PBF be used as a direct replacement for MIC39301-2.5WT?

A: Yes. Both parts deliver 2.5V at 3A in TO-220-5 packages with identical control and protection features. The LT1764ET-2.5#PBF has a higher maximum input voltage (20V vs. 16V) and slightly higher dropout voltage (0.66V vs. 0.55V @ 3A), but these differences do not prevent substitution when the application operates within the MIC39301-2.5WT's input voltage range.

Q: Are the pinouts identical between these parts?

A: Both parts use the TO-220-5 package. Pinout compatibility must be verified against the specific datasheet for each manufacturer, as TO-220-5 packages can have different pin assignments depending on the regulator design.

Q: What is the significance of the dropout voltage difference?

A: The MIC39301-2.5WT has a dropout voltage of 0.55V @ 3A, while the LT1764ET-2.5#PBF has 0.66V @ 3A. Lower dropout voltage reduces heat dissipation and improves efficiency. If thermal performance is critical, the MIC39301-2.5WT is preferred. If input voltage margin is limited, the LT1764ET-2.5#PBF's higher maximum input voltage may be advantageous.

Q: Do both parts support the same operating temperature range?

A: Yes. Both the MIC39301-2.5WT and LT1764ET-2.5#PBF operate from -40°C to 125°C, ensuring compatibility across industrial and commercial temperature specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.