AP1115AY25G-13 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The AP1115AY25G-13 is a linear voltage regulator IC from Diodes Incorporated, classified as a Power Management (PMIC) component. This device delivers a fixed 2.5V output at 600mA in a SOT-89-3 surface mount package. The part is currently listed as obsolete, making identification of functional equivalents and substitutes essential for ongoing design support and production continuity.

Substiute Parts

AP1115AY25G-13

Diodes IncorporatedIn Stock: 705AP1115AY25G-13 Datasheet

Current PartRFQ

AP1115AY25L-13

Diodes IncorporatedIn Stock: 7028AP1115AY25L-13 Datasheet

Parametric EquivalentRFQ

AP1115BY25L-13

Diodes IncorporatedIn Stock: 4795AP1115BY25L-13 Datasheet

Parametric EquivalentRFQ

MCP1703AT-2502E/MB

Microchip TechnologyIn Stock: 1631MCP1703AT-2502E/MB Datasheet

MFR RecommendedRFQ

RT9166A-25GX

Richtek USA Inc.In Stock: 1001RT9166A-25GX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1115AY25G-13 is determined by the following critical parameters:

• Fixed output voltage of 2.5V
• Output current capability of 600mA (minimum requirement)
• Surface mount package SOT-89-3 (TO-243AA)
• Positive fixed output configuration
• Over current and over temperature protection

Substitute parts are grouped into two categories:

Parametric Equivalents (Same Electrical Specifications): Parts that maintain identical electrical performance and packaging, differing only in packaging format (tape & reel vs. cut tape).

Manufacturer Recommended Alternatives: Parts from different manufacturers that meet the core functional requirements but may have variations in secondary parameters such as quiescent current, PSRR, or maximum input voltage.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Obsolete Stock Continuity):

AP1115AY25L-13 and AP1115BY25L-13 are parametric equivalents from Diodes Incorporated. Both maintain identical electrical specifications and package format. Selection between these two depends on packaging format availability: AP1115AY25L-13 is supplied in cut tape format, while AP1115BY25L-13 is supplied in tape & reel format. Both are classified as obsolete.

For Active Product Alternatives:

MCP1703AT-2502E/MB (Microchip Technology) is an active product with identical 2.5V output and 600mA current capability. This part offers extended operating temperature range (-40°C to 125°C) and includes short circuit protection. However, the maximum input voltage is reduced to 16V. This part is suitable for applications where the lower input voltage specification is acceptable.

RT9166A-25GX (Richtek USA Inc.) is an active product with 600mA output current and improved dropout voltage (0.58V typical). However, the maximum input voltage is limited to 5.5V, making this part suitable only for low-voltage input applications. Operating temperature range is -40°C to 85°C.

Frequently Asked Questions (FAQ)

Q: Can AP1115AY25L-13 or AP1115BY25L-13 be used as direct replacements for AP1115AY25G-13?

A: Yes. Both parts are parametric equivalents with identical electrical specifications and SOT-89-3 packaging. The difference is packaging format: cut tape versus tape & reel. No circuit modifications are required.

Q: Is MCP1703AT-2502E/MB a suitable substitute if the application requires 18V input?

A: No. The MCP1703AT-2502E/MB has a maximum input voltage of 16V, compared to 18V for the AP1115AY25G-13. Applications requiring 18V input must use the Diodes Incorporated parts or RT9166A-25GX alternatives that support higher input voltages.

Q: What is the key limitation of RT9166A-25GX?

A: The RT9166A-25GX has a maximum input voltage of 5.5V, significantly lower than the original part's 18V specification. This part is only suitable for low-voltage input applications. Additionally, the operating temperature range is limited to -40°C to 85°C (ambient), compared to 0°C to 125°C (junction) for the original part.

Q: Does MCP1703AT-2502E/MB offer any advantages over the original part?

A: Yes. The MCP1703AT-2502E/MB is an active product with extended temperature range (-40°C to 125°C), lower quiescent current (5 µA vs. 10 mA), and includes short circuit protection. However, the output current is limited to 250mA, which may not be suitable for applications requiring the full 600mA capability of the original part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, consistent with the original AP1115AY25G-13 specification.

Q: What packaging format should be selected for high-volume production?

A: For high-volume production, tape & reel format (AP1115BY25L-13 or MCP1703AT-2502E/MB) is standard. Cut tape format (AP1115AY25L-13) is typically used for lower-volume or prototype applications.