AP1086K33G-13 Equivalent & Substitute Parts

Part Overview

The AP1086K33G-13 is a linear voltage regulator IC from Diodes Incorporated designed to deliver a fixed 3.3V output at 1.5A maximum current in a TO-263 surface mount package. This device is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. The regulator incorporates over-current and over-temperature protection features suitable for general-purpose power management applications requiring stable 3.3V rails.

Substiute Parts

AP1086K33G-13

Diodes IncorporatedIn Stock: 7484AP1086K33G-13 Datasheet

Current PartRFQ

AZ1084CS2-3.3TRE1

Diodes IncorporatedIn Stock: 25144AZ1084CS2-3.3TRE1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1086K33G-13 is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• Surface mount TO-263 package compatibility
• Maximum input voltage rating of 12V or greater
• Operating temperature range of 0°C to 125°C or wider
• Over-current and over-temperature protection capability
• ROHS3 compliance and REACH unaffected status

The substitute part AZ1084CS2-3.3TRE1 meets all these criteria while offering enhanced current delivery capability (5A versus 1.5A), making it suitable for applications where the original part is no longer available. Both parts share identical output voltage, package form factor, input voltage rating, and protection features.

Parameter Comparison

Engineering Selection Recommendations

The AZ1084CS2-3.3TRE1 serves as a direct functional substitute for the AP1086K33G-13 based on the following engineering criteria:

Both devices maintain identical output voltage regulation (3.3V fixed), identical maximum input voltage (12V), and identical operating temperature range (0°C to 125°C). Both are ROHS3 compliant and REACH unaffected, satisfying regulatory requirements for new designs and production continuity.

The AZ1084CS2-3.3TRE1 provides superior current delivery (5A versus 1.5A) and improved power supply rejection ratio (72dB versus 60dB at 120Hz), making it suitable for applications requiring the original part's specifications or greater performance headroom. The identical TO-263 package ensures direct PCB layout compatibility without redesign.

Both parts are classified as obsolete; however, the AZ1084CS2-3.3TRE1 maintains significantly higher inventory availability (25,100 units versus 7,400 units), supporting production requirements.

Frequently Asked Questions (FAQ)

Q: Can the AZ1084CS2-3.3TRE1 directly replace the AP1086K33G-13 on existing PCBs?

A: Yes. Both devices use the identical TO-263-3 D2PAK package with the same pinout and lead configuration. No PCB modifications are required.

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

A: The primary differences are output current rating (5A versus 1.5A) and power supply rejection ratio (72dB versus 60dB at 120Hz). The AZ1084CS2-3.3TRE1 offers enhanced performance in both parameters while maintaining identical voltage regulation and package form factor.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the AP1086K33G-13 and AZ1084CS2-3.3TRE1 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Why is the AP1086K33G-13 marked as obsolete?

A: Product status reflects manufacturer discontinuation. The AZ1084CS2-3.3TRE1 remains available as a functionally equivalent alternative with superior specifications.

Q: What is the voltage dropout difference, and does it affect circuit design?

A: The AP1086K33G-13 exhibits 1.4V dropout at 1.5A, while the AZ1084CS2-3.3TRE1 exhibits 1.5V dropout at 4.5A. For applications operating at or below 1.5A output current, both devices provide comparable dropout performance. The substitute part's dropout specification is measured at higher current, reflecting its higher current capability.

Q: Can I use the AZ1084CS2-3.3TRE1 in a design originally specified for the AP1086K33G-13?

A: Yes. The substitute part meets or exceeds all electrical specifications of the original part, including output voltage, input voltage rating, operating temperature range, and protection features. The higher current rating and improved PSRR provide additional design margin.