AP1115BY33L-13 Equivalent & Substitute Parts

Part Overview

The AP1115BY33L-13 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 3.3V output at 600mA in a surface-mount SOT-89-3 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 design support and production continuity.

Substiute Parts

AP1115BY33L-13

Diodes IncorporatedIn Stock: 19017AP1115BY33L-13 Datasheet

Current PartRFQ

MCP1703AT-3302E/MB

Microchip TechnologyIn Stock: 1977MCP1703AT-3302E/MB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1115BY33L-13 is determined by the following critical parameters:

• Output Voltage: Must be fixed at 3.3V
• Package Type: Must be SOT-89-3 (TO-243AA) for mechanical and thermal compatibility
• Output Configuration: Must be positive fixed output with single regulator
• Protection Features: Must include over-current and over-temperature protection
• Compliance: Must maintain ROHS3 compliance and EAR99 classification

The MCP1703AT-3302E/MB qualifies as a substitute based on matching output voltage, package type, output configuration, and protection feature requirements. However, the output current rating differs, requiring application-level verification of current requirements.

Parameter Comparison

Engineering Selection Recommendations

The MCP1703AT-3302E/MB is an active product from Microchip Technology and represents a viable substitute for the obsolete AP1115BY33L-13 when application current requirements do not exceed 250mA. Both devices maintain ROHS3 compliance and EAR99 classification, ensuring regulatory continuity.

The primary design consideration is output current capacity. The AP1115BY33L-13 supports 600mA, while the MCP1703AT-3302E/MB is rated for 250mA. Applications requiring the full 600mA output current of the original part cannot use this substitute without redesign or parallel configuration.

The MCP1703AT-3302E/MB offers advantages including lower quiescent current (5 µA vs. 10 mA), lower dropout voltage (0.725V vs. 1.3V), extended operating temperature range (-40°C to 125°C vs. 0°C to 125°C), and additional short-circuit protection. These characteristics may improve system efficiency and reliability in current-limited applications.

Frequently Asked Questions (FAQ)

Q: Can the MCP1703AT-3302E/MB directly replace the AP1115BY33L-13 in all applications?

A: Direct replacement is possible only in applications where the load current does not exceed 250mA. The MCP1703AT-3302E/MB has a lower current rating (250mA vs. 600mA). Applications requiring higher current must either use an alternative part with higher current capacity or implement a redesign.

Q: Are the packages physically compatible?

A: Yes. Both devices use the SOT-89-3 package (TO-243AA), ensuring identical PCB footprint and thermal characteristics. No layout modifications are required for package compatibility.

Q: What are the compliance differences?

A: Both parts maintain ROHS3 compliance, REACH Unaffected status, and EAR99 classification. No compliance barriers exist for substitution.

Q: How do the protection features compare?

A: Both devices include over-current and over-temperature protection. The MCP1703AT-3302E/MB adds short-circuit protection, providing enhanced fault tolerance.

Q: What is the impact of different quiescent current specifications?

A: The MCP1703AT-3302E/MB draws 5 µA quiescent current compared to 10 mA for the AP1115BY33L-13. In battery-powered or low-power standby applications, this 2mA difference may be significant. In standard powered applications, the difference is negligible.

Q: Are there input voltage limitations with the substitute?

A: The MCP1703AT-3302E/MB has a maximum input voltage of 16V compared to 18V for the AP1115BY33L-13. Applications with input voltages between 16V and 18V require the original part or an alternative with higher input voltage rating.