AP65500SP-13 Equivalent & Substitute Parts

Part Overview

The AP65500SP-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output applications. This component operates as a step-down converter with a single adjustable output delivering 5A at 0.8V to 16V output range, suitable for power management applications requiring input voltages between 4.75V and 18V. The device features synchronous rectification and operates at 340kHz switching frequency within an 8-SOIC package with exposed pad.

The AP65500SP-13 is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or redesign requirements for applications currently utilizing this component.

Substiute Parts

AP65500SP-13

Diodes IncorporatedIn Stock: 1543AP65500SP-13 Datasheet

Current PartRFQ

RT7247ALGSP

Richtek USA Inc.In Stock: 7150RT7247ALGSP Datasheet

MFR RecommendedRFQ

RT8251GSP

Richtek USA Inc.In Stock: 5453RT8251GSP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP65500SP-13 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Topology: Buck (step-down) switching regulator
• Output Configuration: Positive adjustable
• Number of Outputs: Single output
• Package / Case: 8-SOIC (0.154", 3.90mm Width) Exposed Pad
• Mounting Type: Surface Mount
• Output Voltage Range: Minimum 0.8V adjustable capability
• Operating Temperature Range: -40°C ~ 85°C (TA)

Allowable Parameter Variations:

• Input voltage range may extend beyond the original specification
• Output current rating may differ (higher or lower)
• Switching frequency may vary
• Synchronous rectifier implementation may differ
• Product status may be Active (preferred over Obsolete)

The substitute parts RT7247ALGSP and RT8251GSP meet the mandatory compatibility criteria while offering active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

RT7247ALGSP Selection Criteria: This substitute is suitable for applications where output current requirements do not exceed 2A. The RT7247ALGSP maintains identical switching frequency (340kHz), synchronous rectification capability, and thermal operating range as the original AP65500SP-13. Input voltage range extends to 4.5V minimum, providing enhanced low-voltage operation. Output voltage maximum is reduced to 15V. Product status is Active, ensuring long-term availability and supply chain stability. ROHS3 compliance and MSL rating of 3 (168 Hours) are maintained.

RT8251GSP Selection Criteria: This substitute is suitable for applications requiring the full 5A output current specification matching the original AP65500SP-13. The RT8251GSP supports extended input voltage range up to 24V maximum, providing greater design flexibility for higher input voltage applications. Switching frequency increases to 570kHz, enabling potential reduction in external component size. Synchronous rectification is not implemented in this device. Output voltage maximum is reduced to 15V. Product status is Active with ROHS3 compliance and MSL rating of 3 (168 Hours).

Both substitutes are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can RT7247ALGSP directly replace AP65500SP-13 in all applications? A: RT7247ALGSP is suitable only for applications where maximum output current does not exceed 2A. The original AP65500SP-13 is rated for 5A output current. If your application requires 5A output, RT8251GSP is the appropriate substitute.

Q: What is the primary difference between RT7247ALGSP and RT8251GSP? A: The primary difference is output current rating: RT7247ALGSP provides 2A maximum output current, while RT8251GSP provides 5A maximum output current matching the original AP65500SP-13. Additionally, RT8251GSP supports higher input voltage (up to 24V) and operates at higher switching frequency (570kHz). RT7247ALGSP includes synchronous rectification; RT8251GSP does not.

Q: Are the package dimensions identical between all three parts? A: Yes. All three parts use the 8-SOIC (0.154", 3.90mm Width) Exposed Pad package with identical physical dimensions, enabling direct PCB footprint compatibility.

Q: What is the impact of different switching frequencies? A: RT7247ALGSP operates at 340kHz (matching the original), while RT8251GSP operates at 570kHz. Higher switching frequency in RT8251GSP may allow use of smaller external filter components but may increase switching losses. Circuit design and component selection must account for the frequency difference.

Q: Are there compliance or regulatory differences between the substitutes? A: All three parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity levels differ: AP65500SP-13 has MSL 1 (Unlimited), while both substitutes have MSL 3 (168 Hours). This affects storage and handling requirements.

Q: What is the significance of synchronous rectification differences? A: AP65500SP-13 and RT7247ALGSP include synchronous rectification for improved efficiency. RT8251GSP does not include synchronous rectification, which may result in higher power dissipation in applications with high duty cycle or low output voltage.

Q: Can I use RT8251GSP if my application only requires 2A output? A: Yes. RT8251GSP is rated for 5A maximum output current and can operate at lower current levels. However, RT7247ALGSP may be more appropriate for 2A applications due to identical switching frequency and synchronous rectification matching the original design.