AP1086T33L-U Equivalent & Substitute Parts

Part Overview

The AP1086T33L-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 3.3V output at 1.5A in a TO-220-3 package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement. The AP1086T33L-U provides positive fixed output regulation with integrated over-current and over-temperature protection, suitable for applications requiring stable 3.3V power delivery in through-hole configurations.

Substiute Parts

AP1086T33L-U

Diodes IncorporatedIn Stock: 5714AP1086T33L-U Datasheet

Current PartRFQ

LD1117AV33

STMicroelectronicsIn Stock: 389047LD1117AV33 Datasheet

MFR RecommendedRFQ

LT1086CT-3.3#PBF

Analog Devices Inc.In Stock: 1286LT1086CT-3.3#PBF Datasheet

MFR RecommendedRFQ

LT1086IT-3.3#PBF

Analog Devices Inc.In Stock: 1396LT1086IT-3.3#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1086T33L-U is determined by the following critical parameters:

• Output voltage: 3.3V fixed
• Output current capability: minimum 1.5A
• Package type: TO-220-3 through-hole
• Protection features: Over-current and over-temperature protection
• Compliance: ROHS3 compliant

The substitute parts listed below meet these core electrical and mechanical requirements. The LT1086IT-3.3#PBF and LT1086CT-3.3#PBF are direct functional equivalents from Analog Devices Inc., maintaining identical output specifications and package configuration. The LD1117AV33 from STMicroelectronics provides a compatible alternative with reduced output current (1A versus 1.5A) and represents a downgrade in current capacity but maintains voltage regulation and protection features.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the AP1086T33L-U with maintained 1.5A output current capability, the LT1086IT-3.3#PBF and LT1086CT-3.3#PBF from Analog Devices Inc. are preferred substitutes. Both devices are active products with ROHS3 compliance and identical output specifications. The LT1086IT-3.3#PBF offers extended operating temperature range (-40°C ~ 125°C) compared to the original part, providing additional thermal margin for industrial applications.

The LD1117AV33 from STMicroelectronics is suitable only for applications where output current requirements do not exceed 1A. This part provides higher input voltage tolerance (15V maximum) and improved PSRR (75dB), but represents a current capacity reduction and is also classified as obsolete.

All substitute parts maintain TO-220-3 package compatibility, over-current and over-temperature protection, and ROHS3 compliance, ensuring direct mechanical and electrical interchangeability within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can the LD1117AV33 be used as a direct replacement for the AP1086T33L-U?

A: The LD1117AV33 is mechanically compatible (TO-220-3 package) and maintains the 3.3V output voltage and protection features. However, it is limited to 1A output current versus the 1.5A capability of the AP1086T33L-U. Use this substitute only if your application current requirement does not exceed 1A.

Q: What is the difference between LT1086IT-3.3#PBF and LT1086CT-3.3#PBF?

A: Both parts are manufactured by Analog Devices Inc. and provide identical electrical performance at 1.5A output current with 3.3V fixed output. The primary difference is operating temperature range: LT1086IT-3.3#PBF operates from -40°C to 125°C, while LT1086CT-3.3#PBF operates from 0°C to 125°C. Select based on your application's thermal requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The LT1086IT-3.3#PBF, LT1086CT-3.3#PBF, and LD1117AV33 are all ROHS3 compliant, matching the compliance status of the AP1086T33L-U.

Q: What is the impact of higher input voltage tolerance in substitute parts?

A: The LT1086IT-3.3#PBF and LT1086CT-3.3#PBF accept maximum input voltage of 20V compared to 12V for the AP1086T33L-U, and the LD1117AV33 accepts 15V maximum. Higher input voltage tolerance provides design flexibility but does not affect output regulation or protection performance when operated within the original part's input voltage specification.

Q: Can I use these substitutes in existing PCB designs without modification?

A: Yes. All substitute parts use the TO-220-3 package with identical pin configuration and mechanical footprint, allowing direct PCB mounting without layout changes.