LM2575D2T-ADJR4 Equivalent & Substitute Parts

Part Overview

The LM2575D2T-ADJR4 is a buck switching regulator IC manufactured by onsemi, designed for positive adjustable output applications with 1A output current capability. This part operates across a 4.75V to 40V input range with adjustable output from 1.23V to 37V, utilizing a 52kHz switching frequency in a TO-263-6 D2PAK package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

LM2575D2T-ADJR4

onsemiIn Stock: 798LM2575D2T-ADJR4 Datasheet

Current PartRFQ

LM2575D2T-ADJR4G

onsemiIn Stock: 1429LM2575D2T-ADJR4G Datasheet

DirectRFQ

AP1501-K5G-13

Diodes IncorporatedIn Stock: 13223AP1501-K5G-13 Datasheet

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LM2575WU

Microchip TechnologyIn Stock: 2194LM2575WU Datasheet

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LM2576WU

Microchip TechnologyIn Stock: 12201LM2576WU Datasheet

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LM2576WU-TR

Microchip TechnologyIn Stock: 995LM2576WU-TR Datasheet

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TL2575HV-ADJIKTTR

Texas InstrumentsIn Stock: 1404TL2575HV-ADJIKTTR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2575D2T-ADJR4 is determined by the following critical parameters: output current rating, input voltage range, output voltage adjustability, switching frequency, package type, and operating temperature range. Parts are grouped into two categories based on these criteria.

Direct Equivalent (Same Output Current - 1A): Parts maintaining 1A output current with identical or compatible input/output voltage ranges, switching frequency, and package specifications.

Functional Equivalent (Higher Output Current - 3A): Parts with 3A output current capability, suitable for applications where the original 1A rating is insufficient, provided all other electrical parameters remain compatible or superior.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LM2575D2T-ADJR4G This onsemi part is the direct equivalent with identical electrical specifications and package configuration. It maintains the same 1A output current, 52kHz switching frequency, and voltage ranges. The part is in active production status with ROHS3 compliance, providing the most straightforward replacement path from the obsolete LM2575D2T-ADJR4.

Secondary Recommendation: LM2575WU Manufactured by Microchip Technology, this part provides identical 1A output current and 52kHz switching frequency with the same TO-263-6 D2PAK package. The minimum input voltage is reduced to 4V, offering improved low-voltage performance. ROHS3 compliance and active product status support long-term availability.

Higher Current Alternative: LM2576WU or LM2576WU-TR These Microchip Technology parts provide 3A output current in the same package with identical switching frequency and voltage ranges. Selection between tube (LM2576WU) and tape & reel (LM2576WU-TR) packaging depends on production volume requirements. Both are ROHS3 compliant and actively produced.

Extended Voltage Range Option: TL2575HV-ADJIKTTR This Texas Instruments part maintains 1A output current and 52kHz switching frequency while extending the maximum input voltage to 60V and output voltage to 57V. This option is suitable for applications requiring higher voltage capability. ROHS3 compliant and in active production.

High Frequency Alternative: AP1501-K5G-13 Manufactured by Diodes Incorporated, this part offers 3A output current with an elevated 150kHz switching frequency, enabling smaller passive component sizing. Input and output voltage ranges remain compatible. ROHS3 compliant with active production status. Operating temperature minimum is -20°C versus -40°C for other options.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LM2575D2T-ADJR4 with LM2575D2T-ADJR4G? A: Yes. LM2575D2T-ADJR4G is the direct equivalent with identical electrical specifications, package type, and pin configuration. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 compliant).

Q: What is the difference between 1A and 3A output current parts? A: The 1A parts (LM2575D2T-ADJR4G, LM2575WU, TL2575HV-ADJIKTTR) are suitable for applications requiring up to 1A continuous output current. The 3A parts (LM2576WU, LM2576WU-TR, AP1501-K5G-13) support higher current applications. Selection depends on your circuit's current requirements.

Q: Are all substitute parts in the same package? A: Yes. All listed substitute parts use the TO-263-6 D2PAK (5 Leads + Tab) package, ensuring mechanical and electrical compatibility with the original LM2575D2T-ADJR4 footprint.

Q: What does ROHS3 compliance mean for my design? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances directives, restricting lead and other hazardous materials. The original LM2575D2T-ADJR4 is non-compliant, while all active substitutes are ROHS3 compliant, supporting modern manufacturing and environmental standards.

Q: Why does AP1501-K5G-13 have a different switching frequency? A: AP1501-K5G-13 operates at 150kHz versus 52kHz for other parts. Higher switching frequency allows use of smaller inductors and capacitors in the power stage, reducing board space and component cost at the expense of slightly higher switching losses.

Q: Can I use TL2575HV-ADJIKTTR in a 40V input application? A: Yes. TL2575HV-ADJIKTTR supports input voltages up to 60V, making it compatible with 40V applications. The extended voltage range provides design margin for transient conditions and future design flexibility.

Q: What is the difference between tube and tape & reel packaging? A: Tube packaging (LM2575WU, LM2576WU) is suitable for lower-volume production and manual assembly. Tape & reel packaging (LM2575D2T-ADJR4G, LM2576WU-TR, AP1501-K5G-13, TL2575HV-ADJIKTTR) is optimized for automated pick-and-place assembly in high-volume manufacturing.