AP1115BY15G-13 Equivalent & Substitute Parts

Part Overview

The AP1115BY15G-13 is a linear voltage regulator IC from Diodes Incorporated, delivering a fixed 1.5V output at 600mA in a surface-mount SOT-89-3 package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The device provides positive fixed output regulation with integrated over-current and over-temperature protection, suitable for low-voltage power management applications requiring stable 1.5V rails.

Substiute Parts

AP1115BY15G-13

Diodes IncorporatedIn Stock: 941AP1115BY15G-13 Datasheet

Current PartRFQ

AP1115AY15L-13

Diodes IncorporatedIn Stock: 7844AP1115AY15L-13 Datasheet

Parametric EquivalentRFQ

MCP1703AT-1502E/MB

Microchip TechnologyIn Stock: 1067MCP1703AT-1502E/MB Datasheet

MFR RecommendedRFQ

RT9161-15GX

Richtek USA Inc.In Stock: 773RT9161-15GX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP1115BY15G-13 is determined by the following critical parameters:

Primary Matching Criteria:

• Fixed output voltage of 1.5V
• Surface-mount SOT-89-3 package (TO-243AA case)
• Positive output configuration
• Single regulator topology
• Over-current and over-temperature protection

Secondary Compatibility Factors:

• Output current capability (minimum 600mA required for direct replacement)
• Maximum input voltage (minimum 18V required)
• Operating temperature range (minimum 0°C ~ 125°C)
• RoHS3 compliance

The substitute parts listed below meet the primary matching criteria. Variations in secondary parameters are noted to enable informed selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

AP1115AY15L-13 (Parametric Equivalent - Diodes Incorporated)

This part is the direct parametric equivalent from the same manufacturer. It maintains identical electrical specifications including 600mA output current, 1.5V fixed output, 18V maximum input voltage, and equivalent dropout characteristics. The AP1115AY15L-13 is in active production status with higher inventory availability (7821 units) compared to the obsolete AP1115BY15G-13. This part is recommended as the primary substitute for direct replacement in existing designs. Both parts share the same base product number (AP1115) and are functionally interchangeable.

MCP1703AT-1502E/MB (Microchip Technology)

This part provides a 1.5V fixed output in the same SOT-89-3 package with active product status. The MCP1703AT-1502E/MB is suitable for applications where output current requirements do not exceed 200mA. Key advantages include significantly lower quiescent current (5 µA versus 10 mA), extended operating temperature range (-40°C to 125°C), and additional short-circuit protection. The maximum input voltage is 16V, which is lower than the original part's 18V specification. Selection of this part requires verification that the application's current demand does not exceed 200mA.

RT9161-15GX (Richtek USA Inc.)

This part delivers 1.5V fixed output at 300mA in the SOT-89-3 package with active product status. The RT9161-15GX features superior dropout performance (0.6V @ 300mA) compared to the original part (1.3V @ 600mA), making it advantageous for low-voltage input applications. The maximum input voltage is limited to 12V. This part is suitable for applications requiring 300mA or less output current with input voltages not exceeding 12V. Extended operating temperature range (-40°C to 125°C) is provided.

All substitute parts maintain ROHS3 compliance and are available in active production status, ensuring long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the AP1115AY15L-13 be used as a direct replacement for the AP1115BY15G-13?

A: Yes. The AP1115AY15L-13 is a parametric equivalent with identical electrical specifications, output voltage (1.5V), output current (600mA), input voltage rating (18V), and package (SOT-89-3). Both parts are from Diodes Incorporated and share the same base product number. The primary difference is product status: AP1115AY15L-13 is in active production while AP1115BY15G-13 is obsolete.

Q: What is the key limitation of the MCP1703AT-1502E/MB substitute?

A: The MCP1703AT-1502E/MB has a maximum output current of 200mA, compared to 600mA for the original AP1115BY15G-13. This part is suitable only for applications requiring 200mA or less. Additionally, the maximum input voltage is 16V versus 18V for the original part.

Q: What is the key limitation of the RT9161-15GX substitute?

A: The RT9161-15GX has a maximum output current of 300mA and a maximum input voltage of 12V. This part is suitable for applications requiring 300mA or less output current with input voltages not exceeding 12V. The original AP1115BY15G-13 supports 600mA output and 18V input.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts listed are available in the TO-243AA package, which corresponds to the SOT-89-3 supplier device package. This ensures mechanical and electrical compatibility with existing PCB layouts.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed (AP1115AY15L-13, MCP1703AT-1502E/MB, and RT9161-15GX) are ROHS3 compliant, matching the compliance status of the original AP1115BY15G-13.

Q: Which substitute part has the best availability?

A: The AP1115AY15L-13 has the highest inventory availability at 7821 units in stock, followed by MCP1703AT-1502E/MB at 1023 units, and RT9161-15GX at 725 units.

Q: Can I use a substitute part with lower output current capability?

A: Only if your application's actual current demand does not exceed the substitute part's rating. For example, if your circuit draws 150mA maximum, the MCP1703AT-1502E/MB (200mA rated) is suitable. However, if your circuit requires 600mA, only the AP1115AY15L-13 provides adequate current capacity.