AP1086T50L-U Equivalent & Substitute Parts

Part Overview

The AP1086T50L-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 5V output at 1.5A in a TO-220-3 package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across an industrial temperature range of 0°C to 125°C and includes integrated over-current and over-temperature protection features.

Substiute Parts

AP1086T50L-U

Diodes IncorporatedIn Stock: 5478AP1086T50L-U Datasheet

Current PartRFQ

LT1086CT-5#PBF

Analog Devices Inc.In Stock: 1999LT1086CT-5#PBF Datasheet

MFR RecommendedRFQ

LT1086IT-5#PBF

Analog Devices Inc.In Stock: 1374LT1086IT-5#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1086T50L-U is based on the following critical parameters:

• Fixed 5V output voltage
• 1.5A output current capability
• TO-220-3 through-hole package
• Over-current and over-temperature protection
• ROHS3 compliance and REACH unaffected status
• Identical quiescent current (10 mA)

The substitute parts LT1086CT-5#PBF and LT1086IT-5#PBF, both manufactured by Analog Devices Inc., meet these core electrical and mechanical requirements. Both substitutes are active products with higher maximum input voltage ratings (20V vs. 12V) and improved PSRR performance (68dB vs. 60dB), providing enhanced design margin. The primary difference between the two substitutes is the operating temperature range, with LT1086IT-5#PBF supporting extended temperature operation from -40°C to 125°C.

Parameter Comparison

Engineering Selection Recommendations

Both LT1086CT-5#PBF and LT1086IT-5#PBF are suitable direct replacements for the obsolete AP1086T50L-U. Selection between the two Analog Devices substitutes depends on application temperature requirements:

• LT1086CT-5#PBF is appropriate for applications operating within the 0°C to 125°C range, matching the original part's temperature specification.
• LT1086IT-5#PBF is required for applications requiring extended low-temperature operation down to -40°C.

Both substitutes are active products with established supply availability, ensuring long-term procurement reliability. The improved input voltage rating (20V vs. 12V) and higher PSRR (68dB vs. 60dB) of the Analog Devices parts provide additional design margin compared to the original AP1086T50L-U. All three parts maintain identical output current capability, quiescent current, and protection features, ensuring functional equivalence in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can LT1086CT-5#PBF and LT1086IT-5#PBF be used interchangeably with AP1086T50L-U?

A: Yes, both Analog Devices parts are direct functional equivalents. They share identical output voltage (5V), output current (1.5A), quiescent current (10 mA), and TO-220-3 package configuration. Pin-to-pin compatibility is maintained across all three parts.

Q: What is the difference between LT1086CT-5#PBF and LT1086IT-5#PBF?

A: The primary difference is operating temperature range. LT1086CT-5#PBF operates from 0°C to 125°C, while LT1086IT-5#PBF extends to -40°C on the low end. Both maintain the same electrical performance and package type.

Q: Why do the substitute parts have a higher maximum input voltage (20V vs. 12V)?

A: The Analog Devices LT1086 series is designed with a higher input voltage rating than the original AP1086T50L-U. This provides additional design margin and flexibility in power supply applications without affecting compatibility or performance in circuits designed for the original 12V maximum input specification.

Q: Are the substitute parts RoHS and REACH compliant?

A: Yes, both LT1086CT-5#PBF and LT1086IT-5#PBF are ROHS3 compliant and REACH unaffected, matching the compliance status of the original AP1086T50L-U.

Q: What is the significance of the improved PSRR in the substitute parts?

A: The substitute parts offer 68dB PSRR compared to 60dB in the original part. This 8dB improvement in power supply rejection ratio indicates better noise filtering and rejection of input voltage ripple, providing enhanced performance in noise-sensitive applications.

Q: Can these parts be used in new designs?

A: Yes. Both LT1086CT-5#PBF and LT1086IT-5#PBF are active products suitable for new designs. The LT1086IT-5#PBF is recommended for designs requiring extended temperature range support.