AP1084KL-U Equivalent & Substitute Parts

Part Overview

The AP1084KL-U is a linear voltage regulator IC from Diodes Incorporated designed for positive adjustable output applications. This Surface Mount device delivers 5A output current in a TO-263-3 package and operates across an input voltage range up to 12V with adjustable output from 1.25V to 10.6V. The product is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

AP1084KL-U

Diodes IncorporatedIn Stock: 962AP1084KL-U Datasheet

Current PartRFQ

LT1585CM#PBF

Analog Devices Inc.In Stock: 1176LT1585CM#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1084KL-U is determined by the following critical parameters:

Output Characteristics: Positive adjustable output configuration with minimum output voltage of 1.25V and adjustable range capability.

Current Delivery: Output current rating must support the application requirement. The AP1084KL-U provides 5A; substitute parts must deliver equivalent or greater current capacity.

Input Voltage Range: Maximum input voltage specification of 12V establishes the upper limit for supply compatibility.

Dropout Voltage: Maximum dropout of 1.4V @ rated current defines the minimum input-to-output differential required for regulation.

Package Compatibility: TO-263 package family (D2PAK configuration) with Surface Mount mounting type ensures PCB layout compatibility.

Regulatory Compliance: RoHS3 compliance and MSL Level 1 rating are mandatory for equivalent substitution.

Protection Features: Over Current and Over Temperature protection are baseline requirements; additional protection features in substitutes are acceptable.

The LT1585CM#PBF meets these substitution criteria with compatible output configuration, adjustable voltage range, and regulatory compliance, though with reduced maximum input voltage and output current specifications.

Parameter Comparison

Engineering Selection Recommendations

The LT1585CM#PBF is an Active product from Analog Devices Inc., providing continuity for designs currently using the Obsolete AP1084KL-U. Both devices maintain ROHS3 compliance and MSL Level 1 ratings, ensuring regulatory and environmental compatibility.

Key considerations for selection:

Input Voltage Limitation: The LT1585CM#PBF specifies a maximum input voltage of 7V compared to the AP1084KL-U's 12V. Applications requiring input voltages above 7V cannot use this substitute without external voltage reduction circuitry.

Output Voltage Range: The LT1585CM#PBF maximum output voltage is 5.5V versus 10.6V for the AP1084KL-U. Applications requiring adjustable output above 5.5V require alternative solutions.

Output Current: The LT1585CM#PBF delivers 4.6A versus 5A for the AP1084KL-U. Applications requiring the full 5A output current must evaluate whether 4.6A meets system requirements.

Package Configuration: The LT1585CM#PBF uses TO-263-4 (3 Leads + Tab) versus TO-263-3 (2 Leads + Tab) for the AP1084KL-U. PCB layout modifications are required to accommodate the additional lead.

Enhanced Protection: The LT1585CM#PBF includes Short Circuit protection in addition to Over Current and Over Temperature protection, providing additional system safeguards.

Frequently Asked Questions (FAQ)

Q: Can the LT1585CM#PBF directly replace the AP1084KL-U without PCB modifications?

A: No. The LT1585CM#PBF uses a TO-263-4 package (3 Leads + Tab) while the AP1084KL-U uses TO-263-3 (2 Leads + Tab). PCB layout modifications are required to accommodate the additional lead connection.

Q: What is the maximum input voltage for the LT1585CM#PBF?

A: The LT1585CM#PBF specifies a maximum input voltage of 7V. If your application requires input voltages above 7V, this substitute is not suitable without external voltage regulation.

Q: Are both devices RoHS compliant?

A: Yes. Both the AP1084KL-U and LT1585CM#PBF are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity ratings.

Q: What is the output current difference between these devices?

A: The AP1084KL-U provides 5A output current while the LT1585CM#PBF provides 4.6A. For applications requiring the full 5A specification, the LT1585CM#PBF may not be suitable.

Q: Does the LT1585CM#PBF offer any additional protection features?

A: Yes. The LT1585CM#PBF includes Short Circuit protection in addition to Over Current and Over Temperature protection, compared to Over Current and Over Temperature protection in the AP1084KL-U.

Q: What is the adjustable output voltage range for each device?

A: The AP1084KL-U provides adjustable output from 1.25V to 10.6V. The LT1585CM#PBF provides adjustable output from 1.25V to 5.5V. Applications requiring output voltages above 5.5V cannot use the LT1585CM#PBF.