AP1186K5-33L-U Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The AP1186K5-33L-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-263-5 surface mount package. This device functions as a positive fixed output regulator with integrated over-current and over-temperature protection. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

AP1186K5-33L-U

Diodes IncorporatedIn Stock: 1125AP1186K5-33L-U Datasheet

Current PartRFQ

LT1963EQ-3.3#PBF

Analog Devices Inc.In Stock: 3691LT1963EQ-3.3#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1186K5-33L-U is determined by the following critical electrical and mechanical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 1.5A minimum
• Maximum input voltage rating of 16V or higher
• Surface mount package compatibility with TO-263-5 pinout (D2PAK configuration)
• Protection against over-current and over-temperature conditions
• RoHS3 compliance for regulatory alignment

The LT1963EQ-3.3#PBF meets these substitution criteria. Both devices deliver identical fixed 3.3V output at 1.5A with compatible TO-263-5 packaging and equivalent protection features. The substitute part maintains functional and mechanical compatibility while offering active product status and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The LT1963EQ-3.3#PBF is the manufacturer-recommended substitute for the obsolete AP1186K5-33L-U. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Key considerations for selection:

• The LT1963EQ-3.3#PBF maintains active product status, ensuring long-term availability and supply chain stability compared to the obsolete AP1186K5-33L-U.
• Both parts deliver identical 3.3V fixed output at 1.5A with compatible TO-263-5/DDPAK-5 surface mount packaging.
• The substitute part features a higher maximum input voltage rating (20V vs. 16V), providing greater input voltage margin.
• The LT1963EQ-3.3#PBF includes reverse polarity protection in addition to over-current and over-temperature protection.
• The substitute part exhibits lower quiescent current (1.5 mA vs. 10 mA), reducing standby power consumption.
• The AP1186K5-33L-U offers superior voltage dropout performance (0.38V vs. 0.55V @ 1.5A) and higher PSRR (70dB vs. 63dB).

Frequently Asked Questions (FAQ)

Q: Can the LT1963EQ-3.3#PBF directly replace the AP1186K5-33L-U in existing designs?

A: Yes. Both devices are fixed 3.3V, 1.5A linear regulators in compatible TO-263-5/DDPAK-5 surface mount packages with identical pinout configurations. Electrical performance is equivalent for standard applications.

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

A: The LT1963EQ-3.3#PBF offers active product status, higher input voltage rating (20V vs. 16V), lower quiescent current (1.5 mA vs. 10 mA), and reverse polarity protection. The AP1186K5-33L-U provides lower dropout voltage (0.38V vs. 0.55V) and higher PSRR (70dB vs. 63dB).

Q: Are the packages physically identical?

A: Both parts use TO-263-5 surface mount packaging (D2PAK configuration with 5 leads plus tab). The physical footprint and pin spacing are compatible, allowing direct PCB layout reuse.

Q: Why is the AP1186K5-33L-U obsolete?

A: The AP1186K5-33L-U is classified as obsolete by the manufacturer. The LT1963EQ-3.3#PBF is the active equivalent, ensuring continued availability and support.

Q: Do both parts meet current compliance standards?

A: Yes. Both the AP1186K5-33L-U and LT1963EQ-3.3#PBF are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: Which part should be selected for new designs?

A: The LT1963EQ-3.3#PBF should be selected for new designs due to its active product status, ensuring long-term supply chain availability and manufacturer support.