LM2575D2T-12R4 Equivalent & Substitute Parts

Part Overview

The LM2575D2T-12R4 is a buck switching regulator IC manufactured by onsemi, delivering a fixed 12V output at 1A. This device operates as a step-down converter with a switching frequency of 52kHz, housed in a TO-263-6 D2PAK package with 5 leads plus tab. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

LM2575D2T-12R4

onsemiIn Stock: 1125LM2575D2T-12R4 Datasheet

Current PartRFQ

LM2575D2T-12R4G

onsemiIn Stock: 1853LM2575D2T-12R4G Datasheet

DirectRFQ

AP1501A-12K5G-13

Diodes IncorporatedIn Stock: 1863AP1501A-12K5G-13 Datasheet

SimilarRFQ

LM2575-12WU

Microchip TechnologyIn Stock: 7440LM2575-12WU Datasheet

SimilarRFQ

LM2576-12WU

Microchip TechnologyIn Stock: 1000468LM2576-12WU Datasheet

SimilarRFQ

LM2576-12WU-TR

Microchip TechnologyIn Stock: 2539LM2576-12WU-TR Datasheet

SimilarRFQ

LM2596S-12/NOPB

Texas InstrumentsIn Stock: 2014LM2596S-12/NOPB Datasheet

SimilarRFQ

LM2596SX-12/NOPB

Texas InstrumentsIn Stock: 35465LM2596SX-12/NOPB Datasheet

SimilarRFQ

TL2575HV-12IKTTR

Texas InstrumentsIn Stock: 2413TL2575HV-12IKTTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2575D2T-12R4 is determined by the following critical parameters:

• Output Voltage: 12V fixed output (all substitutes maintain this specification)
• Package / Case: TO-263-6 D2PAK (5 Leads + Tab) for mechanical and thermal compatibility
• Input Voltage Range: Minimum 4.75V to maximum 40V
• Operating Temperature: -40°C to 125°C (TJ)
• Mounting Type: Surface Mount
• Output Current Capability: Minimum 1A (substitutes may exceed this rating)
• Switching Frequency: 52kHz baseline (substitutes may vary)

Substitute parts are grouped into two categories:

Direct Equivalents maintain identical electrical specifications and packaging, differing only in product status and compliance certifications.

Similar Substitutes provide the same 12V fixed output and TO-263-6 package but may feature higher output current ratings, different switching frequencies, or extended input voltage ranges. These are suitable when the application can tolerate enhanced performance specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

LM2575D2T-12R4G is the primary direct equivalent. It maintains all electrical and thermal specifications of the obsolete LM2575D2T-12R4 while offering active product status and ROHS3 compliance. This part is recommended when design specifications require exact parameter matching and compliance with current environmental standards.

For Active Product Status with Equivalent Performance:

LM2575-12WU (Microchip Technology) provides identical output voltage, current, switching frequency, and operating temperature range. The input voltage minimum is extended to 4V, offering improved low-voltage operation. This part is suitable for designs where the lower input voltage threshold provides operational advantage.

TL2575HV-12IKTTR (Texas Instruments) matches the original specifications with extended input voltage range to 60V maximum. This part is appropriate for applications requiring higher input voltage tolerance while maintaining 1A output current and 52kHz switching frequency.

For Enhanced Current Capability:

LM2576-12WU-TR (Microchip Technology) and LM2596S-12/NOPB (Texas Instruments) provide 3A output current in the same TO-263-6 package. These parts are suitable when the application requires higher current delivery without package redesign. Both maintain the 12V fixed output and are ROHS3 compliant.

LM2596SX-12/NOPB (Texas Instruments) offers the same 3A capability with extended inventory availability and identical electrical specifications to LM2596S-12/NOPB.

For Maximum Current Capability:

AP1501A-12K5G-13 (Diodes Incorporated) delivers 5A output current in the same package footprint. This part is suitable for applications requiring the highest current delivery. Note that the operating temperature range is -20°C to 85°C, which is narrower than the original specification.

All recommended substitutes are ROHS3 compliant and carry active product status, ensuring long-term availability and compliance with current environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can LM2575D2T-12R4G be used as a direct replacement for LM2575D2T-12R4?

A: Yes. LM2575D2T-12R4G is a direct equivalent with identical electrical specifications, package, and thermal characteristics. The primary differences are active product status and ROHS3 compliance. No circuit modifications are required.

Q: What is the difference between LM2575-12WU and LM2575D2T-12R4?

A: Both parts deliver 12V at 1A with 52kHz switching frequency in the same TO-263-6 package. LM2575-12WU is manufactured by Microchip Technology and features a lower input voltage minimum of 4V compared to 4.75V. The part is ROHS3 compliant and actively produced.

Q: Can I use LM2576-12WU-TR as a substitute if my application only requires 1A output?

A: Yes. LM2576-12WU-TR provides 3A output capability, which exceeds the 1A requirement. The part maintains the same 12V output voltage, TO-263-6 package, and 52kHz switching frequency. Higher current rating does not prevent use in lower-current applications.

Q: What are the implications of using LM2596S-12/NOPB instead of LM2575D2T-12R4?

A: LM2596S-12/NOPB provides 3A output current and operates at 150kHz switching frequency, compared to 1A and 52kHz for the original part. Both maintain 12V output, TO-263-6 package, and -40°C to 125°C operating temperature. The higher switching frequency may require circuit layout review to ensure EMI compliance.

Q: Is TL2575HV-12IKTTR suitable for applications with input voltages above 40V?

A: Yes. TL2575HV-12IKTTR supports input voltages up to 60V maximum, compared to 40V for the original LM2575D2T-12R4. This extended range is suitable for applications requiring higher input voltage tolerance. All other specifications remain equivalent.

Q: What is the difference between LM2596S-12/NOPB and LM2596SX-12/NOPB?

A: Both parts are electrically identical, delivering 12V at 3A with 150kHz switching frequency in the TO-263-6 package. The primary difference is packaging format: LM2596S-12/NOPB is supplied in tube, while LM2596SX-12/NOPB is supplied in cut tape and digi-reel. LM2596SX-12/NOPB has significantly higher inventory availability.

Q: Can AP1501A-12K5G-13 be used in all applications where LM2575D2T-12R4 is specified?

A: AP1501A-12K5G-13 provides 5A output current and 150kHz switching frequency in the same TO-263-6 package with 12V output. The operating temperature range is -20°C to 85°C, which is narrower than the original -40°C to 125°C specification. Verify that your application temperature requirements fall within this range before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification, ensuring compliance with current environmental regulations. The original LM2575D2T-12R4 is RoHS non-compliant.