MIC39301-1.8WT Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MIC39301-1.8WT is a linear voltage regulator IC manufactured by Microchip Technology, designed to deliver a fixed 1.8V output at 3A in a TO-220-5 package. This positive fixed output regulator is actively produced and widely used in power management applications requiring stable low-voltage rails with integrated protection features. Finding equivalent or substitute parts may be necessary due to inventory constraints, supply chain considerations, or design flexibility requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

MIC39301-1.8WT

Microchip TechnologyIn Stock: 784MIC39301-1.8WT Datasheet

Current PartRFQ

LT1764ET-1.8#PBF

Analog Devices Inc.In Stock: 1267LT1764ET-1.8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC39301-1.8WT are identified based on strict electrical and mechanical compatibility criteria. The following parameters must match or exceed the main part specifications to qualify as a valid substitute:

• Fixed output voltage of 1.8V
• Output current rating of 3A minimum
• TO-220-5 package configuration
• Through-hole mounting type
• Operating temperature range of -40°C to 125°C minimum
• Protection features including Over Current, Over Temperature, and Reverse Polarity protection
• Enable control feature
• Active product status
• RoHS3 compliance

The LT1764ET-1.8#PBF from Analog Devices Inc. meets all these criteria and qualifies as a direct substitute for the MIC39301-1.8WT.

Parameter Comparison

Engineering Selection Recommendations

Both the MIC39301-1.8WT and LT1764ET-1.8#PBF are active products with ROHS3 compliance and REACH unaffected status, making them suitable for current production designs. The LT1764ET-1.8#PBF offers a higher maximum input voltage rating of 20V compared to 16V for the MIC39301-1.8WT, providing additional design margin in applications with variable input supplies. The voltage dropout specification of the MIC39301-1.8WT is 0.55V at 3A, which is lower than the LT1764ET-1.8#PBF at 0.66V at 3A, making the Microchip part more efficient in low-headroom applications. Both devices maintain identical output voltage, current rating, package configuration, and protection feature sets. Selection between these parts should be based on specific input voltage requirements and efficiency constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can the LT1764ET-1.8#PBF be used as a direct replacement for the MIC39301-1.8WT?

A: Yes. Both devices share identical output voltage (1.8V), output current (3A), package (TO-220-5), mounting type (through-hole), operating temperature range (-40°C to 125°C), and protection features (Over Current, Over Temperature, Reverse Polarity). The LT1764ET-1.8#PBF has a higher maximum input voltage rating (20V vs 16V) and slightly higher dropout voltage (0.66V vs 0.55V at 3A).

Q: Are there any package differences between these parts?

A: No. Both the MIC39301-1.8WT and LT1764ET-1.8#PBF use the TO-220-5 package with through-hole mounting. PCB layout and thermal management considerations remain identical.

Q: What are the key differences in electrical specifications?

A: The primary differences are maximum input voltage and dropout voltage. The LT1764ET-1.8#PBF accepts up to 20V input versus 16V for the MIC39301-1.8WT. The MIC39301-1.8WT has lower dropout voltage (0.55V at 3A) compared to the LT1764ET-1.8#PBF (0.66V at 3A). Both deliver 3A at 1.8V output with identical protection and control features.

Q: Are both parts RoHS compliant?

A: Yes. Both the MIC39301-1.8WT and LT1764ET-1.8#PBF are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which part should be selected for a low-headroom application?

A: The MIC39301-1.8WT is preferable for low-headroom designs due to its lower dropout voltage specification of 0.55V at 3A compared to 0.66V for the LT1764ET-1.8#PBF.