AP1115BY28L-13 Equivalent & Substitute Parts

Part Overview

The AP1115BY28L-13 is a linear voltage regulator IC from Diodes Incorporated, designed to deliver a fixed 2.8V output at 600mA in a surface-mount SOT-89-3 package. This part is discontinued at DiGi Electronics, making identification of functional equivalents essential for ongoing design support and production continuity. The regulator provides over-current and over-temperature protection suitable for low-power applications requiring stable 2.8V rails.

Substiute Parts

AP1115BY28L-13

Diodes IncorporatedIn Stock: 760AP1115BY28L-13 Datasheet

Current PartRFQ

AP1115BY28L-13

Diodes IncorporatedIn Stock: 760AP1115BY28L-13 Datasheet

Parametric EquivalentRFQ

MCP1703AT-2802E/MB

Microchip TechnologyIn Stock: 771MCP1703AT-2802E/MB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1115BY28L-13 is determined by the following critical parameters:

• Output Voltage: Must be fixed at 2.8V
• Package / Case: Must be TO-243AA (SOT-89-3) for mechanical and thermal compatibility
• Mounting Type: Surface mount configuration
• Output Configuration: Positive fixed output
• Protection Features: Over-current and over-temperature protection required
• Compliance: ROHS3 compliance maintained

The MCP1703AT-2802E/MB from Microchip Technology meets these core substitution criteria. While it has a lower maximum output current (250mA vs. 600mA), it maintains the same output voltage, package, and protection architecture, making it suitable for applications not requiring the full 600mA capacity.

Parameter Comparison

Engineering Selection Recommendations

The MCP1703AT-2802E/MB is the manufacturer-recommended substitute for the discontinued AP1115BY28L-13. Both parts maintain ROHS3 compliance and identical output voltage specifications. The primary design consideration is output current capacity: the MCP1703AT-2802E/MB is rated for 250mA maximum, compared to the original part's 600mA rating. Applications drawing less than 250mA from the 2.8V rail can directly substitute this part. The MCP1703AT-2802E/MB offers additional advantages including lower quiescent current (5 µA vs. 10 mA), extended operating temperature range (-40°C to 125°C), and integrated short-circuit protection. Both parts are available in identical TO-243AA packaging for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can the MCP1703AT-2802E/MB directly replace the AP1115BY28L-13 in all applications?

A: Direct replacement is possible only for applications requiring 250mA or less from the 2.8V output. If your design draws more than 250mA, the MCP1703AT-2802E/MB will not provide adequate current capacity. Verify your actual load current before substitution.

Q: Are the packages physically identical?

A: Yes. Both parts use the TO-243AA package (SOT-89-3), enabling direct PCB footprint compatibility without layout modifications.

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

A: The MCP1703AT-2802E/MB has lower quiescent current (5 µA vs. 10 mA), lower dropout voltage at its rated current (0.975V @ 250mA vs. 1.3V @ 600mA), and includes short-circuit protection. The AP1115BY28L-13 supports higher output current (600mA vs. 250mA) and higher maximum input voltage (18V vs. 16V).

Q: Are both parts RoHS compliant?

A: Yes. Both the AP1115BY28L-13 and MCP1703AT-2802E/MB are ROHS3 compliant.

Q: What is the operating temperature range for each part?

A: The AP1115BY28L-13 operates from 0°C to 125°C (TJ). The MCP1703AT-2802E/MB operates from -40°C to 125°C (TJ), providing a wider low-temperature range.