AP1086T18L-U Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The AP1086T18L-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 1.8V output at 1.5A in a TO-220-3 package. This positive fixed output regulator is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

AP1086T18L-U

Diodes IncorporatedIn Stock: 6354AP1086T18L-U Datasheet

Current PartRFQ

LD1086V18

STMicroelectronicsIn Stock: 75221LD1086V18 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1086T18L-U is determined by the following critical parameters:

• Fixed output voltage of 1.8V
• Output current capability of 1.5A minimum
• TO-220-3 package configuration for mechanical and thermal compatibility
• Positive output configuration
• Over current and over temperature protection features
• Through hole mounting type

The LD1086V18 from STMicroelectronics meets these core substitution criteria. Both devices share identical output voltage, current rating, package type, and protection feature sets, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The LD1086V18 is a direct functional substitute for the AP1086T18L-U based on matching output voltage, current rating, package configuration, and protection features. Both devices are obsolete and ROHS3 compliant, indicating equivalent environmental and regulatory compliance status.

The LD1086V18 offers extended input voltage tolerance (30V maximum versus 12V) and wider operating temperature range (-40°C to 125°C versus 0°C to 125°C), providing additional design margin in applications requiring these enhanced specifications. The higher PSRR rating (82dB versus 60dB at 120Hz) indicates improved power supply rejection characteristics in the substitute device.

Pin-to-pin compatibility and identical package geometry ensure direct PCB layout compatibility without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the LD1086V18 replace the AP1086T18L-U in existing designs?

A: Yes. Both devices deliver 1.8V fixed output at 1.5A in TO-220-3 packages with identical pin configurations. No circuit modifications are required for direct substitution.

Q: What are the key differences between these devices?

A: The LD1086V18 supports higher maximum input voltage (30V versus 12V) and operates across a wider temperature range (-40°C to 125°C versus 0°C to 125°C). The substitute also provides superior power supply rejection (82dB versus 60dB at 120Hz).

Q: Are both devices subject to the same compliance standards?

A: Yes. Both the AP1086T18L-U and LD1086V18 are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements.

Q: Does package compatibility extend to thermal performance?

A: Both devices use the TO-220-3 package, which provides identical thermal characteristics and PCB mounting footprint. Thermal management considerations remain consistent between the two devices.

Q: Why is the AP1086T18L-U listed as obsolete?

A: Obsolete status indicates the device is no longer manufactured or supported by Diodes Incorporated. The LD1086V18 provides continued availability for applications requiring 1.8V, 1.5A linear regulation in TO-220-3 packaging.