AP1086D50L-U Equivalent & Substitute Parts

Part Overview

The AP1086D50L-U is a linear voltage regulator IC from Diodes Incorporated, designed to deliver a fixed 5V output at 1.5A in a TO-252-3 (DPAK) surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part provides positive fixed output regulation with integrated over-current and over-temperature protection suitable for general-purpose power management circuits.

Substiute Parts

AP1086D50L-U

Diodes IncorporatedIn Stock: 867AP1086D50L-U Datasheet

Current PartRFQ

L7805CDT-TR

STMicroelectronicsIn Stock: 139575L7805CDT-TR Datasheet

MFR RecommendedRFQ

LD1086DT50TR

STMicroelectronicsIn Stock: 15715LD1086DT50TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP1086D50L-U are selected based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

Critical Matching Parameters:

• Output voltage: 5V fixed
• Output current capability: 1.5A minimum
• Package type: TO-252-3 (DPAK) surface mount
• Output configuration: Positive fixed regulator
• Protection features: Over-current and over-temperature protection
• RoHS3 compliance and MSL Level 1 rating

Allowable Parameter Variations:

• Input voltage maximum: Substitute parts may exceed the original 12V specification
• Voltage dropout: Substitute parts may have lower dropout voltage (improved performance)
• Quiescent current: Substitute parts may have lower Iq (improved efficiency)
• PSRR: Substitute parts may have higher PSRR values (improved noise rejection)
• Operating temperature range: Substitute parts may have extended range
• Product status: Active parts are preferred over obsolete parts

Both identified substitutes meet these criteria while offering improved or equivalent electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with full RoHS3 compliance and MSL Level 1 ratings, making them suitable for direct replacement of the obsolete AP1086D50L-U in new designs and production environments.

L7805CDT-TR (STMicroelectronics): This substitute offers a higher maximum input voltage rating of 35V, providing greater design flexibility for applications with variable input sources. The part maintains identical output specifications and package compatibility. Quiescent current is reduced to 8 mA, offering marginal efficiency improvement.

LD1086DT50TR (STMicroelectronics): This substitute provides the lowest dropout voltage at 1.5V @ 1.5A and the highest PSRR at 75dB (120Hz), delivering superior performance in noise-sensitive applications. The extended operating temperature range of -40°C to 125°C accommodates industrial and automotive environments. Input voltage maximum is rated at 30V.

Both parts are electrically and mechanically compatible with the original AP1086D50L-U and require no circuit modifications for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can L7805CDT-TR and LD1086DT50TR be used interchangeably with AP1086D50L-U?

A: Yes. Both substitute parts are pin-compatible in the TO-252-3 (DPAK) package and deliver identical 5V/1.5A output specifications. No circuit modifications are required for direct substitution.

Q: What is the primary difference between the two substitute options?

A: L7805CDT-TR supports higher input voltage (35V vs. 30V) and has lower quiescent current (8 mA vs. 10 mA). LD1086DT50TR offers superior noise rejection (75dB PSRR vs. 62dB) and lower dropout voltage (1.5V vs. 2V), plus extended temperature range (-40°C to 125°C).

Q: Are there any thermal or mounting considerations when substituting these parts?

A: All three parts use identical TO-252-3 (DPAK) packaging with the same thermal characteristics. Existing PCB layouts and thermal management designs require no modification.

Q: Do the substitute parts maintain the same protection features?

A: Both substitutes provide over-temperature protection. L7805CDT-TR includes short-circuit protection; LD1086DT50TR includes over-current protection. The original AP1086D50L-U includes both over-current and over-temperature protection. Verify protection requirements for your specific application.

Q: Are these parts suitable for new product designs?

A: Yes. Both L7805CDT-TR and LD1086DT50TR are active products with full RoHS3 compliance and unlimited moisture sensitivity rating, making them appropriate for new designs and long-term production.

Q: What input voltage range should I use with each substitute?

A: L7805CDT-TR supports up to 35V input; LD1086DT50TR supports up to 30V input. Both require minimum input voltage above the 5V output plus dropout voltage. Verify your circuit's input voltage specification against the selected part's maximum rating.