AP1086D33L-U Equivalent & Substitute Parts

Part Overview

The AP1086D33L-U is a linear voltage regulator IC manufactured by 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 substitute parts necessary for new designs and production continuity. The part provides over-current and over-temperature protection suitable for general-purpose power management applications requiring positive fixed voltage regulation.

Substiute Parts

AP1086D33L-U

Diodes IncorporatedIn Stock: 940AP1086D33L-U Datasheet

Current PartRFQ

LD1086DT33TR

STMicroelectronicsIn Stock: 111516LD1086DT33TR Datasheet

MFR RecommendedRFQ

LD1117ADT33TR

STMicroelectronicsIn Stock: 22860LD1117ADT33TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP1086D33L-U are selected based on the following critical parameters that must align for functional equivalence:

• Fixed output voltage of 3.3V
• Surface mount DPAK (TO-252-3) package compatibility
• Positive output configuration with fixed regulation type
• Over-current and over-temperature protection
• RoHS3 compliance and REACH unaffected status
• Single regulator output configuration

The substitute parts identified are active production devices from STMicroelectronics that maintain package and voltage compatibility while offering enhanced specifications in input voltage rating and PSRR performance.

Parameter Comparison

Engineering Selection Recommendations

LD1086DT33TR is the primary substitute for the AP1086D33L-U. Both devices maintain identical output current capability (1.5A) and package form factor. The LD1086DT33TR is an active production part from STMicroelectronics with superior input voltage rating (30V vs. 12V), extended operating temperature range (-40°C to 125°C), and improved PSRR performance (79dB vs. 60dB). All regulatory compliance requirements (RoHS3, REACH unaffected) are met.

LD1117ADT33TR serves as an alternative substitute when output current requirements do not exceed 1.0A. This device provides the same 3.3V fixed output and DPAK package compatibility. The LD1117ADT33TR features a lower input voltage maximum (15V) and reduced output current rating (1.0A) compared to the primary substitute. Selection of this part is appropriate only for applications with current demands at or below 1.0A.

Both substitute parts are active production devices with established supply availability and full compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can LD1086DT33TR directly replace AP1086D33L-U in existing designs?

A: Yes. Both devices share identical output voltage (3.3V), output current (1.5A), and TO-252-3 DPAK package. The LD1086DT33TR is a direct functional equivalent with enhanced specifications.

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

A: The primary difference is output current capability. LD1086DT33TR delivers 1.5A, while LD1117ADT33TR is rated for 1.0A maximum output current. Input voltage ratings also differ: LD1086DT33TR accepts up to 30V input, while LD1117ADT33TR is limited to 15V input.

Q: Are the substitute parts pin-compatible with AP1086D33L-U?

A: Yes. All three devices use the TO-252-3 (DPAK) package with identical pin configuration: two leads plus tab for ground connection.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both LD1086DT33TR and LD1117ADT33TR are RoHS3 compliant and REACH unaffected, matching the compliance profile of the AP1086D33L-U.

Q: Which substitute should be selected for new designs?

A: LD1086DT33TR is recommended for new designs. It maintains full current capability (1.5A) and offers superior specifications including higher input voltage rating and extended temperature range, while remaining an active production part with established supply channels.