AP1084T15L-U Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The AP1084T15L-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed for positive fixed 1.5V output at 5A in a TO-220-3 package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The regulator provides over-current and over-temperature protection suitable for power management applications requiring stable 1.5V regulation from input sources up to 12V.

Substiute Parts

AP1084T15L-U

Diodes IncorporatedIn Stock: 4193AP1084T15L-U Datasheet

Current PartRFQ

LMS1585ACT-1.5/NOPB

Texas InstrumentsIn Stock: 906LMS1585ACT-1.5/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP1084T15L-U is determined by the following critical parameters:

• Package Compatibility: TO-220-3 through-hole mounting
• Output Voltage: Fixed 1.5V regulation
• Output Current: 5A minimum capability
• Maximum Input Voltage: 12V or higher
• Dropout Voltage: 1.4V @ 5A or lower
• Protection Features: Over-current and over-temperature protection
• Operating Temperature Range: 0°C ~ 125°C minimum
• Compliance: ROHS3 compliance and REACH unaffected status

The LMS1585ACT-1.5/NOPB from Texas Instruments meets all substitution criteria, maintaining identical functional specifications while offering active product status and improved quiescent current characteristics.

Parameter Comparison

Engineering Selection Recommendations

The LMS1585ACT-1.5/NOPB is a direct functional equivalent for the obsolete AP1084T15L-U. Selection rationale is based on:

• Identical electrical specifications: Both devices deliver 5A at 1.5V fixed output with matching dropout voltage characteristics
• Package compatibility: Both use TO-220-3 through-hole mounting, enabling direct PCB substitution
• Active product status: The LMS1585ACT-1.5/NOPB maintains active manufacturing status, ensuring long-term availability and supply chain continuity
• Regulatory compliance: Both components meet ROHS3 and REACH requirements
• Improved efficiency: The LMS1585ACT-1.5/NOPB exhibits lower quiescent current (7 mA vs. 10 mA), reducing standby power consumption
• Enhanced input voltage margin: The LMS1585ACT-1.5/NOPB supports 13V maximum input versus 12V, providing additional design flexibility

Frequently Asked Questions (FAQ)

Q: Can the LMS1585ACT-1.5/NOPB directly replace the AP1084T15L-U without PCB modifications?

A: Yes. Both devices use identical TO-220-3 packaging with the same pin configuration (Input, Ground, Output). Direct pin-for-pin substitution is possible without PCB layout changes.

Q: What are the key differences between these two regulators?

A: The primary differences are manufacturer (Diodes Incorporated vs. Texas Instruments), product status (obsolete vs. active), and quiescent current (10 mA vs. 7 mA). Electrical output specifications and protection features are identical.

Q: Is the LMS1585ACT-1.5/NOPB suitable for applications originally designed for the AP1084T15L-U?

A: Yes. The LMS1585ACT-1.5/NOPB meets or exceeds all electrical and thermal specifications of the AP1084T15L-U, making it suitable for all equivalent applications.

Q: What is the significance of the higher maximum input voltage (13V vs. 12V) on the LMS1585ACT-1.5/NOPB?

A: The 13V maximum input rating provides additional design margin for systems with input voltage variations. This does not affect compatibility but offers improved robustness in applications with marginal input voltage conditions.

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

A: Both devices use identical TO-220-3 packaging and share the same thermal characteristics. Existing heatsink and thermal management solutions designed for the AP1084T15L-U are directly applicable to the LMS1585ACT-1.5/NOPB.

Q: What compliance certifications apply to the LMS1585ACT-1.5/NOPB?

A: The LMS1585ACT-1.5/NOPB is ROHS3 compliant and REACH unaffected, matching the regulatory status of the AP1084T15L-U.