LM2576D2T-012 Equivalent & Substitute Parts

Part Overview

The LM2576D2T-012 is a buck switching regulator IC manufactured by onsemi, designed for positive or negative fixed 12V output applications. This surface-mount device operates in the TO-263-6 (D2PAK) package with a 3A output current capability and 52kHz switching frequency. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility across input voltage range, output voltage specification, package form factor, and thermal operating conditions.

Substiute Parts

LM2576D2T-012

onsemiIn Stock: 936LM2576D2T-012 Datasheet

Current PartRFQ

AP1501A-12K5G-13

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

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LM2575-12WU

Microchip TechnologyIn Stock: 7440LM2575-12WU Datasheet

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LM2575-12WU-TR

Microchip TechnologyIn Stock: 1522LM2575-12WU-TR Datasheet

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LM2576-12WU

Microchip TechnologyIn Stock: 1000468LM2576-12WU Datasheet

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LM2576-12WU-TR

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

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LM2595S-12/NOPB

National SemiconductorIn Stock: 4121LM2595S-12/NOPB Datasheet

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LM2595SX-12/NOPB

National SemiconductorIn Stock: 3384LM2595SX-12/NOPB Datasheet

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LM2596S-12/NOPB

Texas InstrumentsIn Stock: 2014LM2596S-12/NOPB Datasheet

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LM2596SX-12/NOPB

Texas InstrumentsIn Stock: 35465LM2596SX-12/NOPB Datasheet

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TL2575-12IKTTR

Texas InstrumentsIn Stock: 3027TL2575-12IKTTR Datasheet

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TL2575HV-12IKTTR

Texas InstrumentsIn Stock: 2413TL2575HV-12IKTTR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2576D2T-012 are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Output voltage: 12V fixed
• Package compatibility: TO-263-6, D2PAK (5 Leads + Tab)
• Topology: Buck switching regulator
• Output configuration: Positive
• Mounting type: Surface mount
• Number of outputs: Single output

Secondary Compatibility Factors:

• Input voltage range must encompass or exceed 7V to 40V
• Output current rating of 3A or higher
• Operating temperature range of -40°C to 125°C or equivalent
• Switching frequency at or near 52kHz (52kHz to 150kHz acceptable for buck topology)

Substitutes are divided into two categories: direct replacements with matching 3A output current and higher-current alternatives (5A) that provide design margin. Lower-current alternatives (1A) are listed for reference but require circuit redesign validation.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Replacements (3A Output Current):

LM2576-12WU and LM2576-12WU-TR (Microchip Technology) are the primary direct substitutes. Both maintain identical 3A output current, 52kHz switching frequency, and -40°C to 125°C operating temperature range. The LM2576-12WU-TR variant in Tape & Reel packaging is preferred for production environments. Both parts are active products with ROHS3 compliance, addressing the obsolescence of the original onsemi part.

LM2596S-12/NOPB and LM2596SX-12/NOPB (Texas Instruments) provide 3A output current with higher 150kHz switching frequency and active product status. These parts operate within the required input voltage and temperature specifications. The LM2596SX-12/NOPB offers superior inventory availability (35,401 units) and ROHS3 compliance.

Tier 2 - Higher Current Alternative (5A Output Current):

AP1501A-12K5G-13 (Diodes Incorporated) provides 5A output current in the same TO-263-6 package, offering design margin for current-limited applications. This part is active and ROHS3 compliant. Operating temperature range is -20°C to 85°C, which is narrower than the original specification but suitable for most industrial applications. Higher switching frequency (150kHz) reduces output filter component size.

Tier 3 - Lower Current Alternatives (1A Output Current):

LM2575-12WU, LM2575-12WU-TR (Microchip Technology), and TL2575-12IKTTR (Texas Instruments) are suitable only for applications where 1A output current is sufficient. These parts maintain the 52kHz switching frequency and full temperature range. Circuit redesign is required to validate current capacity.

All recommended substitutes maintain the TO-263-6 D2PAK package form factor, ensuring PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can LM2596S-12/NOPB replace LM2576D2T-012 directly?

A: Yes. Both parts deliver 3A output current at 12V fixed output in the TO-263-6 package. The LM2596S-12/NOPB operates at 150kHz switching frequency versus 52kHz for the original part. This higher frequency reduces output filter inductor and capacitor size but requires validation of EMI performance in the target application. Input voltage range (4.5V to 40V) and operating temperature (-40°C to 125°C) are compatible.

Q: Is AP1501A-12K5G-13 a suitable substitute?

A: AP1501A-12K5G-13 is functionally compatible for applications requiring 3A or less output current. The 5A rating provides design margin. Operating temperature range is -20°C to 85°C, which is narrower than the original -40°C to 125°C specification. Use this part only if the application does not require full temperature range operation. Package compatibility is maintained.

Q: What is the difference between LM2576-12WU and LM2576-12WU-TR?

A: Both parts are electrically identical. LM2576-12WU is supplied in Tube packaging for manual handling and lower-volume applications. LM2576-12WU-TR is supplied in Tape & Reel (TR) format for automated assembly and production environments. Select based on assembly process requirements.

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

A: LM2575-12WU is not a direct substitute. It delivers only 1A output current versus 3A for the original part. Use this part only if circuit redesign reduces current requirements below 1A. All other electrical and package parameters are compatible.

Q: Why do some substitutes have different switching frequencies?

A: Switching frequency differences (52kHz versus 150kHz) do not prevent substitution. Higher frequency reduces output filter component size and improves transient response but may increase EMI. Lower frequency reduces EMI but requires larger filter components. Both frequencies are acceptable for 12V buck regulator applications. Validate EMI performance in the target application.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed are ROHS3 compliant except LM2595S-12/NOPB and LM2595SX-12/NOPB, where RoHS status is not specified. The original LM2576D2T-012 is RoHS non-compliant. Use ROHS3-compliant substitutes for applications requiring environmental compliance.

Q: What is the minimum input voltage for substitutes?

A: The original LM2576D2T-012 requires minimum 7V input. Most substitutes operate at lower minimum input voltages (4V to 4.75V), providing greater design flexibility. Verify that the application input voltage meets the selected substitute's minimum specification.