AP1086D33G-13 Equivalent & Substitute Parts

Part Overview

The AP1086D33G-13 is a linear voltage regulator IC from Diodes Incorporated, designed to deliver a fixed 3.3V output at 1.5A in a TO-252-3 (DPAK) surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part provides over-current and over-temperature protection suitable for power management applications requiring stable 3.3V regulation.

Substiute Parts

AP1086D33G-13

Diodes IncorporatedIn Stock: 25449AP1086D33G-13 Datasheet

Current PartRFQ

AZ1084CD-3.3TRG1

Diodes IncorporatedIn Stock: 255135AZ1084CD-3.3TRG1 Datasheet

MFR RecommendedRFQ

LD1086DT33TR

STMicroelectronicsIn Stock: 111516LD1086DT33TR Datasheet

MFR RecommendedRFQ

LD1117ADT33TR

STMicroelectronicsIn Stock: 22860LD1117ADT33TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1086D33G-13 is determined by the following critical parameters:

Fixed Substitution Criteria:

• Output voltage: 3.3V (fixed)
• Package type: TO-252-3 DPAK (mechanical and thermal compatibility)
• Output configuration: Positive
• Protection features: Over Current and Over Temperature
• RoHS3 compliance
• Surface mount technology

Variable Parameters Allowing Substitution:

• Output current capacity (1.5A minimum required)
• Input voltage maximum (12V minimum required)
• Voltage dropout characteristics
• PSRR performance
• Operating temperature range
• Quiescent current
• Moisture sensitivity level

The substitute parts listed maintain identical fixed parameters while offering equal or superior performance in variable parameters, ensuring functional compatibility in applications designed for the AP1086D33G-13.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LD1086DT33TR (STMicroelectronics)

The LD1086DT33TR is the closest functional equivalent to the AP1086D33G-13. Both devices deliver 1.5A at 3.3V in identical TO-252-3 DPAK packaging. The LD1086DT33TR is currently in active production status, ensuring long-term availability. It offers superior PSRR performance (79dB vs. 60dB) and an extended operating temperature range (-40°C to 125°C vs. 0°C to 125°C). Input voltage tolerance is higher (30V vs. 12V), providing greater design margin. MSL rating of 1 (Unlimited) matches the original part. This substitute is recommended for direct replacement in existing designs.

Alternative Substitute: AZ1084CD-3.3TRG1 (Diodes Incorporated)

The AZ1084CD-3.3TRG1 maintains manufacturer continuity with Diodes Incorporated while offering increased output current capacity (5A vs. 1.5A). This part is actively produced and maintains identical 3.3V output and TO-252-3 DPAK packaging. PSRR performance is improved (72dB vs. 60dB). The higher current rating provides design flexibility for applications requiring increased headroom. MSL rating of 3 (168 Hours) requires standard moisture control during storage and handling. This substitute is suitable when higher current capacity is beneficial.

Secondary Substitute: LD1117ADT33TR (STMicroelectronics)

The LD1117ADT33TR delivers 3.3V in the same TO-252-3 DPAK package with active production status. Output current is reduced to 1A, making this substitute applicable only to applications with lower current requirements (≤1A). PSRR performance is improved (75dB vs. 60dB). Input voltage maximum is 15V. MSL rating of 1 (Unlimited) matches the original part. This substitute is suitable for lower-current applications where the 1.5A capacity of the original part exceeds system requirements.

All substitute parts maintain ROHS3 compliance and identical protection features (Over Current, Over Temperature). Selection should be based on specific application current requirements and input voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can the AZ1084CD-3.3TRG1 replace the AP1086D33G-13 in all applications?

A: The AZ1084CD-3.3TRG1 is mechanically and electrically compatible with the AP1086D33G-13 for applications requiring up to 1.5A output current. The higher 5A rating does not create compatibility issues in lower-current designs. However, the MSL rating differs (3 vs. 1), requiring standard moisture control during storage. Verify that your supply chain and storage procedures accommodate MSL-3 requirements.

Q: What is the difference between the LD1086DT33TR and LD1117ADT33TR?

A: Both are STMicroelectronics linear regulators in TO-252-3 DPAK packaging with 3.3V fixed output. The LD1086DT33TR delivers 1.5A output current, matching the original AP1086D33G-13 specification. The LD1117ADT33TR delivers 1A output current. Select the LD1086DT33TR for applications requiring 1.5A; select the LD1117ADT33TR only if your application current requirement is ≤1A.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use TO-252-3 DPAK (2 Leads + Tab) surface mount packaging, ensuring identical PCB footprint and thermal characteristics. No layout modifications are required for substitution.

Q: What does MSL rating mean for component selection?

A: MSL (Moisture Sensitivity Level) indicates moisture absorption limits during storage. MSL-1 (Unlimited) allows indefinite storage without moisture control. MSL-3 (168 Hours) requires storage in dry conditions and limits exposure to 168 hours at specified humidity before reflow soldering. The AZ1084CD-3.3TRG1 carries MSL-3; verify your manufacturing process accommodates this requirement.

Q: Can I use the LD1086DT33TR in place of the AP1086D33G-13 without circuit modifications?

A: Yes. The LD1086DT33TR is a direct functional substitute with identical output voltage (3.3V), output current (1.5A), and package type (TO-252-3 DPAK). No circuit modifications are required. The superior PSRR and extended temperature range provide additional design margin.

Q: Which substitute offers the best performance improvement?

A: The LD1086DT33TR offers the most comprehensive performance improvement: PSRR increases from 60dB to 79dB, operating temperature range extends to -40°C, and input voltage tolerance increases to 30V. These improvements provide greater design margin without increasing cost or complexity.