AP1501A-T5L-U Equivalent & Substitute Parts

Part Overview

The AP1501A-T5L-U is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output applications with 5A output current capability in a TO-220-5 package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The AP1501A-T5L-U operates across a wide input voltage range of 4.5V to 40V with adjustable output from 1.23V to 37V, serving applications requiring step-down voltage regulation with moderate to high current delivery.

Substiute Parts

AP1501A-T5L-U

Diodes IncorporatedIn Stock: 2221AP1501A-T5L-U Datasheet

Current PartRFQ

LM2575T-ADJ/LF03

Texas InstrumentsIn Stock: 2468LM2575T-ADJ/LF03 Datasheet

MFR RecommendedRFQ

LM2575T-ADJ/NOPB

Texas InstrumentsIn Stock: 6780LM2575T-ADJ/NOPB Datasheet

MFR RecommendedRFQ

LM2576T-ADJG

onsemiIn Stock: 6682LM2576T-ADJG Datasheet

MFR RecommendedRFQ

LM2576WT

Microchip TechnologyIn Stock: 5961LM2576WT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1501A-T5L-U is determined by the following critical parameters: buck topology with positive adjustable output configuration, TO-220-5 through-hole package, adjustable output voltage range from 1.23V to 37V, input voltage range compatibility, output current rating, and regulatory compliance (ROHS3). The substitute parts listed maintain functional equivalence through matching topology, output configuration, package type, and voltage specifications. Output current ratings vary among substitutes (1A to 3A), which affects application suitability based on load requirements. All substitutes operate as step-down regulators with adjustable output voltage and maintain the same package footprint for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the AP1501A-T5L-U. The primary differentiator among substitutes is output current capability: LM2575T-ADJ variants deliver 1A, while LM2576T-ADJG and LM2576WT deliver 3A. Applications requiring the full 5A output of the original AP1501A-T5L-U have no direct substitute with matching current rating; such applications require circuit redesign or parallel device configuration. The LM2576T-ADJG and LM2576WT are preferred for applications requiring 3A output, with LM2576WT offering broader input voltage range starting at 4V versus 7V minimum for LM2576T-ADJG. All substitutes are active products with extended operating temperature ranges (-40°C to 125°C) compared to the obsolete AP1501A-T5L-U (-20°C to 85°C), providing improved thermal performance margins.

Frequently Asked Questions (FAQ)

Q: Can the LM2575T-ADJ/LF03 or LM2575T-ADJ/NOPB directly replace the AP1501A-T5L-U in existing designs?

A: Direct replacement is not recommended for applications requiring the full 5A output current of the AP1501A-T5L-U. The LM2575T-ADJ variants are rated for 1A output only. These parts are suitable only for applications with load currents up to 1A. Both variants maintain identical voltage specifications (1.23V to 37V adjustable output) and TO-220-5 package compatibility.

Q: What is the difference between LM2575T-ADJ/LF03 and LM2575T-ADJ/NOPB?

A: Both parts are functionally equivalent Texas Instruments SIMPLE SWITCHER® buck regulators with identical electrical specifications. The primary difference is packaging: LM2575T-ADJ/LF03 features formed leads, while LM2575T-ADJ/NOPB uses standard leads. Selection depends on board assembly equipment compatibility and lead forming requirements.

Q: How do LM2576T-ADJG and LM2576WT compare for 3A applications?

A: Both deliver 3A output current with identical voltage ranges and switching frequency. The LM2576T-ADJG (onsemi) requires minimum 7V input, while LM2576WT (Microchip Technology) operates from 4V minimum input. For applications with input voltages between 4V and 7V, LM2576WT is the appropriate selection.

Q: Are all substitutes compatible with the TO-220-5 package footprint?

A: All substitute parts use TO-220-5 package configuration with through-hole mounting, maintaining identical PCB footprint and pin spacing as the AP1501A-T5L-U. LM2575T-ADJ/LF03 features formed leads, which may require lead straightening during assembly depending on board design.

Q: What is the impact of switching frequency differences between the main part and substitutes?

A: The AP1501A-T5L-U operates at 150kHz switching frequency, while all substitutes operate at 52kHz. Lower switching frequency in substitutes results in larger output filter components and potentially higher output ripple voltage. Circuit redesign of output filtering may be necessary to meet ripple specifications in noise-sensitive applications.