LM2575-12WU Equivalent & Substitute Parts

Part Overview

The LM2575-12WU is a buck switching regulator IC manufactured by Microchip Technology, designed for step-down voltage conversion with a fixed 12V output and 1A current capacity. This device operates across a wide input voltage range of 4V to 40V and is housed in a TO-263-6 D2PAK package with 5 leads plus tab. The part is currently active in production with ROHS3 compliance and is widely used in power management applications requiring compact, efficient DC-DC conversion.

Equivalent and substitute parts are necessary when the original LM2575-12WU becomes unavailable, when alternative sourcing is required for cost optimization, or when design specifications allow for higher current capacity or extended input voltage ranges while maintaining the same output voltage and package compatibility.

Substiute Parts

LM2575-12WU

Microchip TechnologyIn Stock: 7440LM2575-12WU Datasheet

Current PartRFQ

LM2596S-12/NOPB

Texas InstrumentsIn Stock: 2014LM2596S-12/NOPB Datasheet

MFR RecommendedRFQ

LM2596SX-12/NOPB

Texas InstrumentsIn Stock: 35465LM2596SX-12/NOPB Datasheet

MFR RecommendedRFQ

NCV2575D2T-12R4G

onsemiIn Stock: 5844NCV2575D2T-12R4G Datasheet

MFR RecommendedRFQ

TL2575-12IKTTR

Texas InstrumentsIn Stock: 3027TL2575-12IKTTR Datasheet

MFR RecommendedRFQ

TL2575HV-12IKTTR

Texas InstrumentsIn Stock: 2413TL2575HV-12IKTTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575-12WU is determined by the following critical parameters:

Fixed Requirements (Must Match):

• Output voltage: 12V fixed
• Package type: TO-263-6 D2PAK (5 Leads + Tab)
• Output configuration: Positive
• Topology: Buck
• Mounting type: Surface Mount

Flexible Parameters (May Vary):

• Output current: Equal to or greater than 1A
• Input voltage range: Must encompass minimum 4V to maximum 40V
• Switching frequency: May differ
• Manufacturer: Alternative sources permitted
• Product status: Active or Obsolete (with inventory availability consideration)

The substitute parts listed below meet all fixed requirements and maintain electrical compatibility while offering variations in current capacity, input voltage range, or manufacturer sourcing.

Parameter Comparison

Engineering Selection Recommendations

Direct Pin-Compatible Substitutes (1A Output Current):

TL2575-12IKTTR and TL2575HV-12IKTTR from Texas Instruments are direct functional equivalents to the LM2575-12WU, maintaining identical output current (1A) and switching frequency (52kHz). Both are active products with ROHS3 compliance. The TL2575HV-12IKTTR variant extends the maximum input voltage to 60V, providing additional design margin for applications with higher input voltage transients. Both parts are available in Cut Tape & Digi-Reel packaging.

NCV2575D2T-12R4G from onsemi provides identical electrical specifications (1A output, 52kHz switching frequency) and package compatibility. However, this part carries an Obsolete product status, making it suitable only for legacy system maintenance or when existing inventory is available.

Higher Current Capacity Substitutes (3A Output Current):

LM2596S-12/NOPB and LM2596SX-12/NOPB from Texas Instruments offer increased output current capacity (3A) while maintaining the same 12V fixed output voltage and TO-263-6 D2PAK package. These parts operate at 150kHz switching frequency, which is higher than the original 52kHz. Both are active products with ROHS3 compliance. The LM2596SX-12/NOPB variant is available in higher quantity (35,401 pcs) compared to the tube-packaged LM2596S-12/NOPB (2,000 pcs).

Selection between these substitutes depends on application requirements: use 1A-rated parts for direct replacement in current-limited designs, or select 3A-rated parts when design specifications allow for higher current capacity or when sourcing the original part becomes unavailable.

Frequently Asked Questions (FAQ)

Q: Can I use LM2596S-12/NOPB or LM2596SX-12/NOPB as a direct replacement for LM2575-12WU?

A: Yes, these parts are electrically compatible substitutes. Both maintain the same 12V fixed output voltage, TO-263-6 D2PAK package, and operating temperature range. The primary differences are increased output current capacity (3A versus 1A) and higher switching frequency (150kHz versus 52kHz). If your circuit design is rated for 1A output current, the higher capacity of the LM2596 series will not cause issues and provides additional design margin.

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

A: Both parts are functionally identical with 1A output current and 52kHz switching frequency. The primary difference is the maximum input voltage specification: TL2575-12IKTTR supports up to 40V input, while TL2575HV-12IKTTR extends this to 60V. Select the HV variant if your application requires operation at higher input voltages or if input voltage transients may exceed 40V.

Q: Why is NCV2575D2T-12R4G listed as Obsolete?

A: The NCV2575D2T-12R4G carries an Obsolete product status from onsemi, indicating it is no longer in active production. However, inventory remains available (5,800 pcs). This part is suitable for legacy system maintenance or repair applications where existing stock is available, but should not be selected for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts (LM2596S-12/NOPB, LM2596SX-12/NOPB, NCV2575D2T-12R4G, TL2575-12IKTTR, and TL2575HV-12IKTTR) carry ROHS3 compliance certification, matching the original LM2575-12WU.

Q: What packaging options are available for these substitutes?

A: LM2596S-12/NOPB is supplied in Tube packaging. LM2596SX-12/NOPB, TL2575-12IKTTR, and TL2575HV-12IKTTR are available in Cut Tape & Digi-Reel packaging. NCV2575D2T-12R4G is supplied in Tape & Reel format. All parts use the same TO-263-6 D2PAK physical package.

Q: Can I use a 3A-rated part in a circuit designed for 1A?

A: Yes. The 3A-rated LM2596 series parts can be used in applications designed for 1A output current. The higher current rating provides additional design margin and does not negatively impact circuit operation. The circuit will draw only the current it requires, regardless of the regulator's maximum current rating.