AP65450SP-13 Equivalent & Substitute Parts

Part Overview

The AP65450SP-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable step-down voltage regulation with a 4A output current capability. This component operates across an input voltage range of 4.5V to 18V and delivers adjustable output voltage from 0.76V to 6V at a switching frequency of 650kHz. The device features a synchronous rectifier and is housed in an 8-SOIC package with exposed pad for enhanced thermal performance.

The AP65450SP-13 is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this regulator topology.

Substiute Parts

AP65450SP-13

Diodes IncorporatedIn Stock: 1140AP65450SP-13 Datasheet

Current PartRFQ

AOZ6605PI

Alpha & Omega Semiconductor Inc.In Stock: 4226AOZ6605PI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP65450SP-13 is determined by strict alignment of the following critical parameters:

Electrical Compatibility Requirements:

• Input voltage range: 4.5V minimum to 18V maximum
• Output voltage adjustability: Minimum output voltage at or below 0.76V; maximum output voltage at or above 6V
• Output current capability: Equal to or greater than 4A
• Switching frequency: 650kHz (matching frequency reduces design re-qualification)
• Synchronous rectifier topology: Required for thermal and efficiency equivalence

Mechanical & Package Requirements:

• Package type: 8-SOIC with exposed pad (0.154", 3.90mm Width)
• Mounting type: Surface mount
• Pin-compatible footprint

Compliance & Environmental Requirements:

• RoHS3 compliance
• Operating temperature range: -40°C to 85°C minimum
• Moisture sensitivity level: MSL 1 or equivalent

The AOZ6605PI meets all substitution criteria and is classified as an equivalent part for the AP65450SP-13.

Parameter Comparison

Engineering Selection Recommendations

The AOZ6605PI is a direct substitute for the AP65450SP-13 based on the following engineering criteria:

Electrical Equivalence: The AOZ6605PI maintains identical input voltage range (4.5V–18V) and switching frequency (650kHz). The output voltage range of the substitute (0.6V–15.3V) encompasses the original specification (0.76V–6V), ensuring full compatibility with existing designs. The output current rating of 5A exceeds the original 4A requirement, providing additional design margin.

Package & Mechanical Compatibility: Both devices utilize the 8-SOIC package with exposed pad and identical physical dimensions (0.154", 3.90mm Width). Pin-to-pin compatibility and footprint equivalence enable direct PCB substitution without layout modifications.

Compliance & Availability: The AOZ6605PI holds active product status with ROHS3 compliance and MSL 1 rating, matching the original part's environmental certifications. The substitute is available in production quantities, addressing the obsolescence of the AP65450SP-13.

Thermal & Efficiency Performance: Both devices incorporate synchronous rectifier topology and operate across the same temperature range (-40°C to 85°C), ensuring equivalent thermal behavior and efficiency characteristics in target applications.

Frequently Asked Questions (FAQ)

Q: Can the AOZ6605PI be used as a direct replacement for the AP65450SP-13 without PCB modifications?

A: Yes. The AOZ6605PI is pin-compatible and package-equivalent to the AP65450SP-13. Both devices use the 8-SOIC package with exposed pad and identical pinout. No PCB layout changes are required for substitution.

Q: What are the key electrical differences between these parts?

A: The AOZ6605PI provides higher output current capability (5A versus 4A) and an extended maximum output voltage range (15.3V versus 6V). The minimum output voltage of the substitute (0.6V) is lower than the original (0.76V). Input voltage range and switching frequency remain identical. These differences favor the substitute for design flexibility while maintaining full compatibility with the original specification.

Q: Why is the AP65450SP-13 classified as obsolete?

A: The AP65450SP-13 has reached end-of-life status with Diodes Incorporated. The AOZ6605PI from Alpha & Omega Semiconductor Inc. is an active production alternative that meets or exceeds all electrical and mechanical requirements.

Q: Are there compliance or certification differences between the two parts?

A: Both parts are ROHS3 compliant with MSL 1 moisture sensitivity rating. Compliance certifications are equivalent. The AOZ6605PI maintains active product status, ensuring ongoing support and supply chain continuity.

Q: What is the impact of the higher current rating (5A) of the AOZ6605PI on thermal design?

A: The higher current rating of the AOZ6605PI does not negatively impact existing designs. Thermal performance is determined by actual load current and PCB thermal design. For applications drawing 4A or less, thermal behavior remains equivalent to the original part. The higher rating provides additional margin for future design iterations.

Q: Can the extended output voltage range of the AOZ6605PI (up to 15.3V) affect circuit operation?

A: No. The extended maximum output voltage range of the substitute does not affect circuits designed for the original 0.76V–6V range. Output voltage is set by external feedback resistors and remains independent of the IC's maximum rating. The wider range provides design flexibility for alternative applications.

Q: What packaging options are available for the AOZ6605PI?

A: The AOZ6605PI is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. The 8-SOIC package with exposed pad is standard across both the original and substitute parts.