AP1084T25G-U Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The AP1084T25G-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 2.5V output at 5A in a TO-220-3 package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity. The part operates across an input voltage range up to 12V with a maximum dropout voltage of 1.4V at full load current, incorporating over-current and over-temperature protection features.

Substiute Parts

AP1084T25G-U

Diodes IncorporatedIn Stock: 1378AP1084T25G-U Datasheet

Current PartRFQ

MIC39500-2.5WT

Microchip TechnologyIn Stock: 1248MIC39500-2.5WT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP1084T25G-U is determined by the following critical parameters:

• Fixed output voltage of 2.5V
• Minimum output current rating of 5A
• TO-220-3 package configuration
• Positive output configuration
• Single regulator topology
• Over-current and over-temperature protection

The MIC39500-2.5WT qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. Both devices deliver identical fixed 2.5V output at 5A with identical package geometry, enabling pin-compatible replacement in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The MIC39500-2.5WT is the qualified substitute for the obsolete AP1084T25G-U. Selection rationale is based on the following factors:

Electrical Compatibility: Both devices deliver 2.5V fixed output at 5A with identical TO-220-3 package pinouts, enabling direct circuit board replacement without layout modifications.

Product Status: The MIC39500-2.5WT maintains active manufacturing status with Microchip Technology, ensuring long-term availability and supply chain continuity compared to the obsolete AP1084T25G-U.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying equivalent environmental and regulatory requirements.

Performance Advantages: The MIC39500-2.5WT demonstrates superior electrical characteristics including lower dropout voltage (0.575V versus 1.4V at 5A), higher maximum input voltage rating (16V versus 12V), extended operating temperature range (-40°C to 125°C versus 0°C to 125°C), and additional reverse polarity protection.

Frequently Asked Questions (FAQ)

Q: Can the MIC39500-2.5WT directly replace the AP1084T25G-U without circuit modifications?

A: Yes. Both devices share identical TO-220-3 package pinouts, fixed 2.5V output voltage, and 5A output current rating. Direct pin-for-pin substitution is supported without circuit board layout changes.

Q: What are the key differences between these two regulators?

A: The MIC39500-2.5WT offers improved performance with lower dropout voltage (0.575V versus 1.4V), higher input voltage tolerance (16V versus 12V), wider operating temperature range (-40°C to 125°C versus 0°C to 125°C), and additional reverse polarity protection. Both maintain identical output specifications and package configuration.

Q: Why is the AP1084T25G-U classified as obsolete?

A: Diodes Incorporated has discontinued this product line. The MIC39500-2.5WT from Microchip Technology provides equivalent functionality with active manufacturing support.

Q: Are both parts RoHS compliant?

A: Yes. Both the AP1084T25G-U and MIC39500-2.5WT are ROHS3 compliant and REACH unaffected, meeting equivalent environmental standards.

Q: What is the package type for both regulators?

A: Both devices use the TO-220-3 through-hole package, a standard three-pin configuration for linear voltage regulators. This package type is widely used in power management applications requiring moderate current delivery.

Q: Does the MIC39500-2.5WT offer any additional protection features?

A: Yes. The MIC39500-2.5WT includes reverse polarity protection in addition to the over-current and over-temperature protection present in both devices.