AP1086T50G-U Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The AP1086T50G-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 5V output at 1.5A in a TO-220-3 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 system support, design updates, and production continuity.

Substiute Parts

AP1086T50G-U

Diodes IncorporatedIn Stock: 1586AP1086T50G-U Datasheet

Current PartRFQ

MCP1827S-5002E/AB

Microchip TechnologyIn Stock: 13383MCP1827S-5002E/AB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1086T50G-U is determined by the following critical parameters:

• Output Voltage: Must be fixed at 5V
• Output Current Capability: Minimum 1.5A required
• Package: TO-220-3 form factor for direct pin-compatible replacement
• Mounting Type: Through-hole configuration
• Protection Features: Over-temperature protection mandatory; additional protection (short-circuit, UVLO) acceptable
• Compliance: RoHS3 compliance required

The MCP1827S-5002E/AB from Microchip Technology meets all substitution criteria. While it features improved electrical characteristics (lower dropout voltage, lower quiescent current, extended temperature range), it maintains functional and physical compatibility with the original part.

Parameter Comparison

Engineering Selection Recommendations

The MCP1827S-5002E/AB is the qualified substitute for the obsolete AP1086T50G-U. Selection is based on the following factors:

Functional Compatibility: Both devices deliver 1.5A at 5V output with identical TO-220-3 pinout, enabling direct replacement without PCB modification.

Product Status: The substitute is active production, ensuring long-term availability and supply chain stability, whereas the original part is obsolete.

Compliance: Both parts maintain ROHS3 compliance and identical regulatory classification (EAR99, HTSUS 8542.39.0001), satisfying procurement and export requirements.

Enhanced Characteristics: The substitute offers superior performance through reduced dropout voltage (0.6V vs. 1.4V), significantly lower quiescent current (220 µA vs. 10 mA), and extended operating temperature range (-40°C to 125°C vs. 0°C to 125°C). These improvements reduce thermal dissipation and power consumption in the application.

Protection Enhancement: The substitute includes short-circuit and under-voltage lockout protection in addition to over-temperature protection, providing additional circuit safeguards.

Input Voltage Consideration: The substitute has a lower maximum input voltage rating (6V vs. 12V). Applications requiring input voltages above 6V must be evaluated for compatibility.

Frequently Asked Questions (FAQ)

Q: Can the MCP1827S-5002E/AB directly replace the AP1086T50G-U without PCB changes?

A: Yes. Both devices use the TO-220-3 package with identical pinout (input, ground, output). No PCB modification is required for physical installation.

Q: What is the primary reason for substitution?

A: The AP1086T50G-U is obsolete. The MCP1827S-5002E/AB is an active production part from a major manufacturer, ensuring continued availability and supply chain reliability.

Q: Are there any electrical differences that affect circuit operation?

A: The substitute has a lower maximum input voltage (6V vs. 12V). If your application uses input voltages above 6V, the substitute is not suitable. For applications within 6V input maximum, the substitute performs identically or better due to lower dropout voltage and improved quiescent current characteristics.

Q: Does the substitute provide the same protection features?

A: The substitute includes all protection features of the original (over-temperature) plus additional protections (short-circuit, under-voltage lockout). This represents an enhancement with no loss of functionality.

Q: What is the temperature operating range difference?

A: The original operates 0°C to 125°C; the substitute operates -40°C to 125°C. The substitute supports extended low-temperature operation, beneficial for applications in harsh environments.

Q: Are both parts RoHS compliant?

A: Yes. Both the AP1086T50G-U and MCP1827S-5002E/AB are ROHS3 compliant and carry identical regulatory classifications.

Q: What is the packaging difference?

A: The original is supplied in bulk; the substitute is supplied in tubes. Both are through-hole mounted TO-220-3 packages suitable for automated or manual assembly.