AP6503ASP-13 Equivalent & Substitute Parts

Part Overview

The AP6503ASP-13 is a buck switching regulator IC from Diodes Incorporated designed for positive adjustable output applications. This Power Management (PMIC) device delivers 3A output current with an adjustable output range from 0.925V to 20V, suitable for step-down conversion applications with input voltage range of 4.75V to 23V. The part is classified as Obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

AP6503ASP-13

Diodes IncorporatedIn Stock: 16568AP6503ASP-13 Datasheet

Current PartRFQ

AP6503SP-13

Diodes IncorporatedIn Stock: 50181AP6503SP-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP6503ASP-13 is determined by strict alignment of the following critical parameters:

• Output topology: Buck (step-down) configuration with positive adjustable output
• Electrical specifications: Input voltage range 4.75V minimum to 23V maximum; output voltage adjustable from 0.925V to 20V; 3A output current capability
• Package compatibility: 8-SOIC (0.154", 3.90mm Width) Exposed Pad surface mount package
• Thermal and compliance requirements: Operating temperature -40°C to 85°C; ROHS3 compliance; MSL 1 rating
• Synchronous rectifier functionality: Required for efficiency

The AP6503SP-13 qualifies as a direct substitute based on identical output topology, package form factor, thermal operating range, and compliance certifications. Variations in switching frequency (340kHz vs. 240kHz) and minimum input voltage (4.7V vs. 4.75V) remain within acceptable substitution parameters for this device category.

Parameter Comparison

Engineering Selection Recommendations

Both the AP6503ASP-13 and AP6503SP-13 are classified as Obsolete products from Diodes Incorporated. Selection between these parts is based on packaging availability and inventory status rather than functional differences. The AP6503SP-13 is available in Cut Tape (CT) and Digi-Reel packaging with significantly higher inventory (50,100 pcs vs. 16,520 pcs), making it the preferred choice for procurement continuity.

Both parts maintain identical ROHS3 compliance, MSL 1 rating, and thermal operating specifications. The switching frequency difference (340kHz vs. 240kHz) represents a design variation within the AP6503 base product family and does not affect substitution eligibility for applications designed around the original 240kHz specification, provided circuit design accommodates the higher frequency operation.

Frequently Asked Questions (FAQ)

Q: Can AP6503SP-13 directly replace AP6503ASP-13 in existing designs?

A: Yes. Both parts share identical output topology, voltage specifications, current rating, package form factor, and thermal operating range. The higher switching frequency of the AP6503SP-13 (340kHz vs. 240kHz) is a design variation within the same product family and does not prevent direct substitution.

Q: What is the significance of the packaging difference between these parts?

A: AP6503ASP-13 uses standard packaging, while AP6503SP-13 is available in Cut Tape (CT) and Digi-Reel formats. This affects procurement and handling but does not impact electrical or mechanical compatibility. The physical package dimensions remain identical.

Q: Are there compliance or certification differences between these substitutes?

A: No. Both parts maintain identical ROHS3 compliance status, MSL 1 rating, REACH Unaffected status, and ECCN/HTSUS classifications. Thermal operating range (-40°C to 85°C) is identical across both parts.

Q: Why is the minimum input voltage slightly different (4.75V vs. 4.7V)?

A: This represents a minor specification variation within the AP6503 product family. The 4.7V minimum of the AP6503SP-13 provides slightly broader input voltage coverage and does not affect substitution eligibility.

Q: What should be considered when selecting between these obsolete parts?

A: Prioritize inventory availability and packaging format requirements. The AP6503SP-13 offers higher stock levels (50,100 pcs) and standard distribution packaging, making it the practical choice for new procurement despite both parts being classified as Obsolete.