AP65502SP-13 Equivalent & Substitute Parts

Part Overview

The AP65502SP-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output voltage regulation in power management applications. This device operates as a step-down converter with a single adjustable output, delivering up to 4A output current across an input voltage range of 4.75V to 17V. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for new designs and production continuity.

Substiute Parts

AP65502SP-13

Diodes IncorporatedIn Stock: 908AP65502SP-13 Datasheet

Current PartRFQ

RT7237BHGSP

Richtek USA Inc.In Stock: 7475RT7237BHGSP Datasheet

MFR RecommendedRFQ

RT7237CHGSP

Richtek USA Inc.In Stock: 21424RT7237CHGSP Datasheet

MFR RecommendedRFQ

RT7247BHGSP

Richtek USA Inc.In Stock: 3618RT7247BHGSP Datasheet

MFR RecommendedRFQ

RT7247CHGSP

Richtek USA Inc.In Stock: 2318RT7247CHGSP Datasheet

MFR RecommendedRFQ

RT7257BHZSP

Richtek USA Inc.In Stock: 26857RT7257BHZSP Datasheet

MFR RecommendedRFQ

RT7257BLZSP

Richtek USA Inc.In Stock: 20025RT7257BLZSP Datasheet

MFR RecommendedRFQ

RT7257GHZSP

Richtek USA Inc.In Stock: 392646RT7257GHZSP Datasheet

MFR RecommendedRFQ

RT7257GLZSP

Richtek USA Inc.In Stock: 2158RT7257GLZSP Datasheet

MFR RecommendedRFQ

RT7297BHZSP

Richtek USA Inc.In Stock: 80365RT7297BHZSP Datasheet

MFR RecommendedRFQ

RT7297CHZSP

Richtek USA Inc.In Stock: 18337RT7297CHZSP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP65502SP-13 is determined by the following critical electrical and mechanical parameters:

Mandatory Compatibility Criteria:

• Package type: 8-SOIC (0.154", 3.90mm Width) Exposed Pad (all substitutes match)
• Output configuration: Positive adjustable (all substitutes match)
• Minimum output voltage: 0.8V (all substitutes match)
• Operating temperature range: -40°C to 85°C (all substitutes match)
• Synchronous rectifier: Yes (all substitutes match)
• Surface mount topology (all substitutes match)

Allowable Parameter Variations:

• Output current: Substitutes range from 2A to 3A (lower than original 4A)
• Input voltage maximum: Substitutes support 18V (higher than original 17V)
• Switching frequency: Varies between 800kHz and 1.2MHz (different from original 500kHz)
• Maximum output voltage: Substitutes limited to 12V (lower than original 16V)

The substitute parts are grouped by output current capacity: 2A variants (RT7237 and RT7247 series) and 3A variants (RT7257 and RT7297 series). Selection depends on application current requirements and output voltage ceiling constraints.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current production environments. The AP65502SP-13 obsolete status necessitates transition to one of these active alternatives.

For applications requiring maximum output current capacity: RT7257 and RT7297 series parts (3A output) provide the closest current rating to the original 4A specification. RT7257GHZSP and RT7297BHZSP offer the highest inventory availability.

For applications with output voltage requirements exceeding 12V: No substitute part supports the original 16V maximum output voltage. Applications requiring output voltages above 12V require circuit redesign or alternative component selection outside this substitute list.

For applications with output voltage requirements up to 12V and current requirements up to 3A: RT7257 and RT7297 series parts are functionally compatible. Selection between these series depends on switching frequency requirements and thermal design considerations.

For applications with output current requirements up to 2A: RT7237 and RT7247 series parts provide suitable alternatives with lower current ratings, reducing thermal dissipation requirements.

All substitutes maintain identical package geometry (8-SOIC with exposed pad), operating temperature range (-40°C to 85°C), and positive adjustable output configuration, enabling direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can RT7237 or RT7247 series parts (2A) replace the AP65502SP-13 (4A) in all applications?

A: No. These parts are suitable only for applications requiring output current up to 2A. Applications designed for the full 4A output capability of the AP65502SP-13 require RT7257 or RT7297 series parts rated for 3A, or alternative components rated for 4A or higher.

Q: What is the impact of the maximum output voltage limitation (12V vs. 16V) on substitution?

A: Substitute parts are limited to 12V maximum output voltage, compared to the original 16V. Applications requiring adjustable output voltages above 12V cannot use these substitutes without circuit modification.

Q: Are all substitute parts pin-compatible with the AP65502SP-13?

A: All substitute parts use the identical 8-SOIC (0.154", 3.90mm Width) Exposed Pad package. Pin compatibility requires verification against individual device datasheets, as internal pin assignments may differ between manufacturers.

Q: What is the significance of switching frequency differences (500kHz vs. 800kHz/1.2MHz)?

A: Switching frequency affects output filter design, electromagnetic interference characteristics, and efficiency. Higher switching frequencies (800kHz, 1.2MHz) allow smaller passive component values but may increase switching losses. Circuit redesign may be necessary to accommodate these differences.

Q: Which substitute part offers the best inventory availability?

A: RT7257GHZSP provides the highest inventory level at 392,629 units in stock, followed by RT7257BHZSP at 26,778 units and RT7297BHZSP at 80,300 units.

Q: Are all substitute parts suitable for new design implementations?

A: Yes. All substitute parts carry active product status with ROHS3 compliance and REACH unaffected certification, making them suitable for new designs and production environments.