AP1084T18L-U Equivalent & Substitute Parts

Part Overview

The AP1084T18L-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 1.8V output at 5A in a TO-220-3 through-hole package. This component is classified as a Power Management (PMIC) device and is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

AP1084T18L-U

Diodes IncorporatedIn Stock: 9794AP1084T18L-U Datasheet

Current PartRFQ

AP1084T18L-U

Diodes IncorporatedIn Stock: 9794AP1084T18L-U Datasheet

Parametric EquivalentRFQ

MIC39500-1.8WT

Microchip TechnologyIn Stock: 934MIC39500-1.8WT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1084T18L-U is determined by strict alignment with the following electrical and mechanical parameters:

• Fixed 1.8V output voltage
• 5A output current capability
• TO-220-3 through-hole package
• Positive output configuration
• Over current and over temperature protection
• RoHS3 compliance

The MIC39500-1.8WT from Microchip Technology meets all these core requirements and is classified as a manufacturer-recommended substitute. Both parts deliver identical functional output specifications and share the same package footprint, enabling direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The MIC39500-1.8WT is the primary substitute for the discontinued AP1084T18L-U. Selection is based on the following factors:

• Both parts maintain identical 1.8V fixed output and 5A current delivery in TO-220-3 packaging
• The MIC39500-1.8WT carries active product status, ensuring ongoing availability and supply chain continuity
• Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements
• The MIC39500-1.8WT provides enhanced specifications including higher maximum input voltage (16V vs. 12V), lower dropout voltage (0.575V vs. 1.4V @ 5A), and additional reverse polarity protection
• Extended operating temperature range (-40°C to 125°C) on the MIC39500-1.8WT provides broader environmental coverage

Frequently Asked Questions (FAQ)

Q: Can the MIC39500-1.8WT directly replace the AP1084T18L-U in existing designs?

A: Yes. Both regulators share identical output voltage (1.8V fixed), output current (5A), and TO-220-3 package configuration. Pin-to-pin compatibility and functional equivalence enable direct substitution without circuit modification.

Q: What are the key differences between these parts?

A: The MIC39500-1.8WT offers superior performance characteristics: maximum input voltage of 16V (vs. 12V), significantly lower dropout voltage of 0.575V @ 5A (vs. 1.4V), and additional reverse polarity protection. Operating temperature range extends to -40°C on the MIC39500-1.8WT compared to 0°C on the AP1084T18L-U.

Q: Are both parts RoHS compliant?

A: Yes. Both the AP1084T18L-U and MIC39500-1.8WT are ROHS3 compliant and REACH unaffected, meeting current regulatory standards.

Q: Why is the AP1084T18L-U discontinued?

A: The AP1084T18L-U is discontinued at DiGi Electronics. The MIC39500-1.8WT remains in active production status, providing reliable long-term availability for new designs and ongoing support.

Q: Does package footprint differ between these regulators?

A: No. Both components use the TO-220-3 through-hole package, ensuring identical PCB layout and mechanical compatibility.