AP1115AY33L-13 Equivalent & Substitute Parts

Part Overview

The AP1115AY33L-13 is a linear voltage regulator IC from Diodes Incorporated designed for positive fixed 3.3V output applications. This Surface Mount device delivers 600mA output current in a compact SOT-89-3 package. The part is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

AP1115AY33L-13

Diodes IncorporatedIn Stock: 1553AP1115AY33L-13 Datasheet

Current PartRFQ

MCP1703AT-3302E/MB

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP1115AY33L-13 is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• Surface Mount packaging in SOT-89-3 configuration
• Positive output configuration with single regulator
• Over Current and Over Temperature protection
• RoHS3 compliance and REACH unaffected status

The MCP1703AT-3302E/MB qualifies as a substitute based on matching output voltage, package type, and protection feature set. However, output current capability differs: the substitute provides 250mA versus the original 600mA. This reduction in current capacity must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

The MCP1703AT-3302E/MB is an Active product from Microchip Technology with full RoHS3 compliance and REACH unaffected status, providing long-term availability and regulatory compliance assurance compared to the Obsolete AP1115AY33L-13.

Key considerations for selection:

• Output current capacity: The substitute supports 250mA maximum versus 600mA for the original. Applications requiring current draw exceeding 250mA cannot use this substitute.
• Input voltage tolerance: The substitute accepts maximum 16V input versus 18V for the original. Verify input voltage specifications do not exceed 16V.
• Quiescent current: The substitute draws significantly lower quiescent current (5 µA vs 10 mA), beneficial for battery-powered or low-power standby applications.
• Temperature range: The substitute extends the lower operating limit to -40°C, providing broader environmental coverage.
• Package compatibility: Both devices use identical SOT-89-3 packaging, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the MCP1703AT-3302E/MB directly replace the AP1115AY33L-13 in all applications?

A: Direct replacement is possible only if the application current requirement does not exceed 250mA. The substitute is rated for 250mA maximum output current compared to the original 600mA. If your circuit draws more than 250mA from the 3.3V rail, this substitute is not suitable.

Q: Are the packages physically identical?

A: Yes. Both parts use SOT-89-3 packaging (TO-243AA case). PCB footprints are compatible, and no layout modifications are required for physical placement.

Q: What are the compliance differences?

A: Both parts are ROHS3 compliant and REACH unaffected. The substitute is an Active product with current manufacturer support, while the original is Obsolete. For new designs or long-term production, the Active substitute provides superior supply chain stability.

Q: How do the protection features compare?

A: Both devices include Over Current and Over Temperature protection. The substitute adds Short Circuit protection, providing enhanced fault tolerance.

Q: Does the lower quiescent current of the substitute affect circuit performance?

A: Lower quiescent current (5 µA vs 10 mA) reduces standby power consumption. This is beneficial in low-power applications and does not negatively impact performance in standard applications.

Q: What is the impact of different PSRR specifications?

A: The original provides 60dB PSRR at 120Hz versus 35dB at 100Hz for the substitute. PSRR (Power Supply Rejection Ratio) indicates noise filtering capability. The original offers superior noise rejection; applications sensitive to supply noise should evaluate this difference against current capacity constraints.

Q: Can I use the substitute if my input voltage is 17V?

A: No. The substitute maximum input voltage is 16V. Input voltages exceeding 16V will exceed the device rating. The original supports up to 18V input.