AP65400SP-13 Equivalent & Substitute Parts

Part Overview

The AP65400SP-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable step-down voltage regulation with a 4A output capacity. This component operates across an input voltage range of 4.75V to 18V and provides adjustable output from 0.8V to 16V, making it suitable for diverse power management applications requiring compact surface-mount solutions.

The AP65400SP-13 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this regulator. Substitute components must maintain functional compatibility while meeting the electrical and mechanical requirements of the original design.

Substiute Parts

AP65400SP-13

Diodes IncorporatedIn Stock: 4226AP65400SP-13 Datasheet

Current PartRFQ

RT7247ALGSP

Richtek USA Inc.In Stock: 7150RT7247ALGSP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP65400SP-13 is evaluated based on the following critical parameters that define functional and mechanical compatibility:

• Topology & Function: Buck (step-down) topology with positive adjustable output configuration
• Voltage Specifications: Input range 4.75V to 18V minimum; output adjustable from 0.8V minimum
• Output Current Capacity: 4A rated output
• Switching Frequency: 340kHz operation
• Synchronous Rectification: Integrated synchronous rectifier requirement
• Package Compatibility: 8-SOIC with exposed pad, surface-mount configuration
• Operating Temperature Range: -40°C to 85°C
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The RT7247ALGSP from Richtek USA Inc. is identified as a manufacturer-recommended substitute. While this part operates at a reduced output current rating of 2A (compared to 4A in the original), it maintains compatibility across all other critical parameters including topology, voltage specifications, package form factor, switching frequency, and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The RT7247ALGSP is the manufacturer-recommended substitute for the AP65400SP-13. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

The primary design consideration for substitution is the output current rating differential: the RT7247ALGSP is rated for 2A output versus the 4A rating of the original AP65400SP-13. Selection of the RT7247ALGSP is appropriate for applications where the required load current does not exceed 2A. For applications requiring the full 4A output capacity of the original design, alternative substitutes with matching 4A specifications must be evaluated.

Both components share identical package geometry (8-SOIC with exposed pad), switching frequency (340kHz), and thermal operating range (-40°C to 85°C), ensuring mechanical and thermal compatibility in existing PCB layouts and thermal management designs.

Frequently Asked Questions (FAQ)

Q: Can the RT7247ALGSP directly replace the AP65400SP-13 in all applications?

A: Direct replacement is possible only for applications where the load current requirement does not exceed 2A. The RT7247ALGSP has a lower output current rating (2A) compared to the original part (4A). If your application requires 4A output capacity, the RT7247ALGSP is not suitable without circuit redesign.

Q: Are there package compatibility concerns between these parts?

A: No. Both the AP65400SP-13 and RT7247ALGSP use identical 8-SOIC (0.154", 3.90mm Width) exposed pad packages with surface-mount configuration. PCB footprints and thermal pad designs are compatible.

Q: What is the difference in input voltage specifications?

A: The RT7247ALGSP accepts a minimum input voltage of 4.5V, while the AP65400SP-13 requires a minimum of 4.75V. The RT7247ALGSP provides slightly broader input voltage tolerance. Both support the same maximum input of 18V.

Q: Are there output voltage range differences?

A: The AP65400SP-13 supports adjustable output up to 16V, while the RT7247ALGSP supports up to 15V. For applications requiring output voltages above 15V, the original AP65400SP-13 specifications must be maintained or alternative substitutes evaluated.

Q: Do both parts have the same switching frequency?

A: Yes. Both the AP65400SP-13 and RT7247ALGSP operate at 340kHz switching frequency, ensuring compatibility with existing filter designs and EMI considerations.

Q: What is the regulatory compliance status of the substitute?

A: The RT7247ALGSP is ROHS3 compliant and REACH unaffected, matching the compliance profile of the original AP65400SP-13. Both parts meet current environmental and hazardous substance regulations.