AP1115BY50G-13 Equivalent & Substitute Parts

Part Overview

The AP1115BY50G-13 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 5V output at 600mA in a surface-mount SOT-89-3 package. This part is classified as obsolete, making equivalent substitute components necessary for new designs and production continuity. The AP1115BY50G-13 serves applications requiring stable 5V regulation from input sources up to 18V with integrated over-current and over-temperature protection.

Substiute Parts

AP1115BY50G-13

Diodes IncorporatedIn Stock: 731AP1115BY50G-13 Datasheet

Current PartRFQ

MCP1703AT-5002E/MB

Microchip TechnologyIn Stock: 1526MCP1703AT-5002E/MB Datasheet

MFR RecommendedRFQ

RT9161A-50GX

Richtek USA Inc.In Stock: 2390RT9161A-50GX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP1115BY50G-13 are selected based on the following critical parameters that define functional equivalence:

• Fixed 5V output voltage
• Surface-mount SOT-89-3 package (TO-243AA case)
• Positive output configuration
• Single regulator output
• Over-current and over-temperature protection
• ROHS3 compliance
• Active product status for design continuity

The substitute parts listed below maintain these core electrical and mechanical specifications. Variations in maximum input voltage, output current capacity, dropout voltage, quiescent current, and PSRR are documented to enable informed selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with ROHS3 compliance, providing design continuity for applications currently using the obsolete AP1115BY50G-13.

The MCP1703AT-5002E/MB offers the lowest quiescent current (5 µA) and lowest dropout voltage (0.65V @ 250mA), making it suitable for low-power applications where efficiency is prioritized. However, its 250mA output current rating is significantly lower than the original part's 600mA specification. This substitute is appropriate only for applications requiring ≤250mA output current.

The RT9161A-50GX provides 500mA output current capacity, closer to the original 600mA rating, with a maximum input voltage of 12V and 1V dropout voltage @ 500mA. This part is suitable for applications with input voltages ≤12V and output current requirements between 250mA and 500mA.

Selection between substitutes depends on specific application requirements for maximum input voltage, output current capacity, and operating temperature range. Both parts maintain the same 5V fixed output, SOT-89-3 package, and core protection features as the original component.

Frequently Asked Questions (FAQ)

Q: Can the MCP1703AT-5002E/MB directly replace the AP1115BY50G-13 in all applications?

A: The MCP1703AT-5002E/MB is electrically compatible for 5V regulation in SOT-89-3 packages but has a maximum output current of 250mA compared to the original 600mA. Direct replacement is only suitable for applications requiring ≤250mA output current.

Q: What is the key difference between the RT9161A-50GX and the original AP1115BY50G-13?

A: The RT9161A-50GX provides 500mA output current (versus 600mA), has a lower maximum input voltage of 12V (versus 18V), and operates across an extended temperature range of -40°C to 125°C (versus 0°C to 125°C). The 1V dropout voltage @ 500mA is comparable to the original 1.3V @ 600mA.

Q: Are all substitute parts in the same package?

A: Yes, all listed substitutes use the TO-243AA case with SOT-89-3 supplier device package, ensuring mechanical and pin compatibility with the original AP1115BY50G-13.

Q: Do the substitute parts have the same protection features?

A: Both substitutes include over-current and over-temperature protection. The MCP1703AT-5002E/MB adds short-circuit protection, providing enhanced protection compared to the original part.

Q: What is the impact of the MCP1703AT-5002E/MB's lower quiescent current?

A: The 5 µA quiescent current (versus 10 mA in the original) reduces standby power consumption, beneficial for battery-powered or low-power applications. This advantage is offset by the lower 250mA output current rating.

Q: Which substitute is best for high-input-voltage applications?

A: The MCP1703AT-5002E/MB supports up to 16V input, while the RT9161A-50GX supports up to 12V. For applications requiring input voltages above 12V, the MCP1703AT-5002E/MB is the appropriate choice, provided output current requirements do not exceed 250mA.

Q: What is the MSL difference between substitutes, and does it matter?

A: The MCP1703AT-5002E/MB has MSL 1 (unlimited moisture sensitivity), while the RT9161A-50GX has MSL 3 (168 hours). MSL 3 requires controlled storage and handling conditions. For standard manufacturing environments, this difference is typically not critical but should be considered for long-term inventory storage.