LM2575T-12G Equivalent & Substitute Parts

Part Overview

The LM2575T-12G is a buck switching regulator IC manufactured by onsemi, delivering a fixed 12V output at 1A in a TO-220-5 package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The LM2575T-12G operates across a wide input voltage range of 4.75V to 40V with a switching frequency of 52kHz and is rated for operating temperatures from -40°C to 125°C.

Substiute Parts

LM2575T-12G

onsemiIn Stock: 884LM2575T-12G Datasheet

Current PartRFQ

LM2575T-ADJG

onsemiIn Stock: 5000346LM2575T-ADJG Datasheet

MFR RecommendedRFQ

LM2576-12WT

Microchip TechnologyIn Stock: 1114LM2576-12WT Datasheet

SimilarRFQ

LM2596T-12/NOPB

Texas InstrumentsIn Stock: 1000441LM2596T-12/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2575T-12G is determined by the following critical parameters: fixed 12V output voltage, TO-220-5 package compatibility, buck topology, positive output configuration, and operating temperature range of -40°C to 125°C. The substitute parts are grouped into two categories based on their relationship to the main part:

MFR Recommended Substitute: The LM2575T-ADJG shares the identical base product number (LM2575), manufacturer (onsemi), package (TO-220-5), input voltage range (4.75V to 40V), switching frequency (52kHz), and operating temperature range. The key difference is output type: the LM2575T-ADJG provides adjustable output (1.23V to 37V) rather than fixed 12V. This part is active and can be configured for 12V operation through external resistor networks.

Similar Manufacturer Substitutes: The LM2576-12WT (Microchip Technology) and LM2596T-12/NOPB (Texas Instruments) both deliver fixed 12V output in TO-220-5 packages with identical operating temperature ranges and RoHS3 compliance. These parts differ in output current capability (3A versus 1A) and switching frequency (52kHz or 150kHz), making them suitable for applications requiring higher current capacity or different frequency characteristics.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the LM2575T-12G with active product status and identical electrical characteristics, the LM2575T-ADJG is the manufacturer-recommended substitute from onsemi. This part maintains full compatibility with existing PCB layouts and requires only external resistor configuration to set the 12V output voltage.

For applications where higher output current capacity is acceptable, the LM2576-12WT and LM2596T-12/NOPB provide 3A output capability while maintaining the fixed 12V output, TO-220-5 package, and full operating temperature range. The LM2596T-12/NOPB operates at 150kHz switching frequency, which may reduce output filter component sizes compared to the 52kHz alternatives.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Selection should be based on output current requirements, switching frequency considerations, and PCB layout constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the LM2575T-ADJG directly replace the LM2575T-12G without PCB modifications?

A: The LM2575T-ADJG uses the identical TO-220-5 package and pinout as the LM2575T-12G. However, the adjustable output requires external resistor divider configuration to set the 12V output voltage. PCB modifications are necessary to add these resistors.

Q: What is the primary difference between the LM2575T-12G and LM2576-12WT?

A: The LM2576-12WT provides 3A output current compared to the 1A rating of the LM2575T-12G, while maintaining the same fixed 12V output and TO-220-5 package. Both operate at 52kHz switching frequency.

Q: How does the LM2596T-12/NOPB differ from the other substitutes?

A: The LM2596T-12/NOPB operates at 150kHz switching frequency, compared to 52kHz for the LM2575T-12G and LM2576-12WT. This higher frequency allows for smaller output filter components. The LM2596T-12/NOPB also provides 3A output current and is manufactured by Texas Instruments.

Q: Are all substitute parts available in active product status?

A: Yes. The LM2575T-ADJG, LM2576-12WT, and LM2596T-12/NOPB are all classified as active products, ensuring long-term availability and support compared to the obsolete LM2575T-12G.

Q: Do the substitute parts meet the same regulatory compliance as the original part?

A: All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the LM2575T-12G.

Q: Which substitute is recommended for new designs?

A: For new designs requiring 1A output at 12V, the LM2575T-ADJG is the manufacturer-recommended choice from onsemi. For applications requiring higher current capacity, the LM2576-12WT or LM2596T-12/NOPB are suitable alternatives.