LM2575D2T-012 Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The LM2575D2T-012 is a buck switching regulator IC manufactured by onsemi, designed for positive fixed 12V output at 1A current capacity. This device operates as a step-down converter with a fixed output topology, suitable for surface mount applications in the TO-263-6 D2PAK package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

LM2575D2T-012

onsemiIn Stock: 2131LM2575D2T-012 Datasheet

Current PartRFQ

TL2575-12IKTTR

Texas InstrumentsIn Stock: 3027TL2575-12IKTTR Datasheet

DirectRFQ

AP1501A-12K5G-13

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

SimilarRFQ

LM2575-12WU-TR

Microchip TechnologyIn Stock: 1522LM2575-12WU-TR 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-012 is determined by the following critical parameters:

• Output Voltage: Fixed 12V output is mandatory
• Output Current Capacity: Minimum 1A required; higher ratings (3A, 5A) are acceptable for drop-in replacement
• Input Voltage Range: Minimum 4.75V to 40V compatibility required
• Package / Case: TO-263-6 D2PAK (5 Leads + Tab) physical compatibility required
• Switching Frequency: 52kHz nominal operation
• Operating Temperature Range: -40°C to 125°C (TJ) required
• Topology: Buck (step-down) configuration mandatory
• Output Configuration: Positive fixed output mandatory

Substitute parts are grouped into two categories:

Direct Equivalents (1A output current, identical specifications):

• TL2575-12IKTTR (Texas Instruments)
• TL2575HV-12IKTTR (Texas Instruments)

Higher Current Capacity Substitutes (3A or 5A output current, compatible parameters):

• LM2575-12WU-TR (Microchip Technology, 1A)
• LM2576-12WU-TR (Microchip Technology, 3A)
• AP1501A-12K5G-13 (Diodes Incorporated, 5A)
• LM2596S-12/NOPB (Texas Instruments, 3A)
• LM2596SX-12/NOPB (Texas Instruments, 3A)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

TL2575-12IKTTR is the primary direct equivalent. It maintains identical electrical specifications (1A output, 52kHz switching frequency, -40°C to 125°C operating range) and package compatibility. This part is manufactured by Texas Instruments with Active product status and ROHS3 compliance, providing long-term availability and regulatory compliance advantages over the obsolete onsemi part.

TL2575HV-12IKTTR offers identical current and frequency specifications with extended input voltage range (4.75V to 60V versus 40V maximum). This part is suitable when higher input voltage tolerance is required.

For Higher Current Capacity Applications:

LM2576-12WU-TR and LM2596S-12/NOPB both provide 3A output current in the same package. LM2576-12WU-TR maintains the 52kHz switching frequency and -40°C to 125°C temperature range. LM2596S-12/NOPB operates at 150kHz with identical temperature range, offering higher switching frequency for potentially smaller external component sizing.

AP1501A-12K5G-13 provides the highest current capacity at 5A with 150kHz switching frequency. Operating temperature range is limited to -20°C to 85°C, making it unsuitable for applications requiring full -40°C to 125°C operation.

Compliance Considerations:

All active substitute parts listed are ROHS3 compliant, addressing the non-compliance status of the obsolete LM2575D2T-012. Selection should prioritize active product status parts to ensure long-term procurement viability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can I use a higher current rated part as a direct substitute?

A: Yes. Parts rated for 3A or 5A output current are electrically compatible with 1A load requirements. The higher current rating provides design margin and does not negatively impact circuit operation at lower current levels. Package compatibility (TO-263-6 D2PAK) and fixed 12V output voltage must be maintained.

Q: What is the difference between TL2575-12IKTTR and TL2575HV-12IKTTR?

A: Both parts are identical except for maximum input voltage specification. TL2575HV-12IKTTR supports input voltages up to 60V, while TL2575-12IKTTR is rated to 40V. Select TL2575HV-12IKTTR only if your application requires the extended input voltage range.

Q: Why do some substitute parts operate at 150kHz instead of 52kHz?

A: LM2596 series parts (LM2596S-12/NOPB and LM2596SX-12/NOPB) use 150kHz switching frequency. This higher frequency allows for smaller external filter components but may require circuit board layout adjustments. Verify compatibility with existing PCB design before selection.

Q: Is the AP1501A-12K5G-13 suitable for all applications?

A: The AP1501A-12K5G-13 has a reduced operating temperature range (-20°C to 85°C) compared to the original part (-40°C to 125°C). Use this part only in applications where the narrower temperature range is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed are ROHS3 compliant, providing regulatory compliance advantages over the obsolete, non-compliant LM2575D2T-012.

Q: What packaging options are available for these substitutes?

A: All substitute parts maintain the TO-263-6 D2PAK (5 Leads + Tab) package for direct PCB compatibility. Packaging formats (Cut Tape, Tape & Reel, Tube) vary by manufacturer and supplier but do not affect electrical or mechanical compatibility.

Q: Can I use LM2575-12WU-TR as a substitute?

A: Yes. LM2575-12WU-TR is a direct equivalent manufactured by Microchip Technology with identical 1A output current, 52kHz frequency, and -40°C to 125°C operating range. It offers ROHS3 compliance and Active product status.