LM2575-5.0BU Equivalent & Substitute Parts

Part Overview

The LM2575-5.0BU is a buck switching regulator IC from Microchip Technology designed for positive fixed 5V output at 1A current. This device operates across a 4V to 40V input range with a 52kHz switching frequency and is housed in a TO-263-6 D2PAK package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

LM2575-5.0BU

Microchip TechnologyIn Stock: 4662LM2575-5.0BU Datasheet

Current PartRFQ

LM2575-5.0WU

Microchip TechnologyIn Stock: 6412LM2575-5.0WU Datasheet

DirectRFQ

AP1506-50K5G-13

Diodes IncorporatedIn Stock: 2404AP1506-50K5G-13 Datasheet

MFR RecommendedRFQ

LM2592HVS-5.0/NOPB

Texas InstrumentsIn Stock: 1000183LM2592HVS-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2592HVSX-5.0/NOPB

Texas InstrumentsIn Stock: 60474LM2592HVSX-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2596S-5.0/NOPB

Texas InstrumentsIn Stock: 9015LM2596S-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2596SX-5.0/NOPB

Texas InstrumentsIn Stock: 43147LM2596SX-5.0/NOPB Datasheet

MFR RecommendedRFQ

NCV2575D2T-5R4G

onsemiIn Stock: 1288NCV2575D2T-5R4G Datasheet

MFR RecommendedRFQ

TL2575-05IKTTR

Texas InstrumentsIn Stock: 21640TL2575-05IKTTR Datasheet

MFR RecommendedRFQ

TL2575-05IKTTRG3

Texas InstrumentsIn Stock: 5442TL2575-05IKTTRG3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2575-5.0BU is determined by the following critical parameters:

• Output voltage specification (5V fixed)
• Output current capability (minimum 1A)
• Input voltage range compatibility (4V to 40V minimum)
• Package compatibility (TO-263-6 D2PAK)
• Switching topology (buck converter)
• Operating temperature range (-40°C to 125°C)

Substitute parts are grouped into two categories: direct equivalents with identical electrical specifications and functional alternatives with enhanced current ratings or input voltage ranges that maintain backward compatibility.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the obsolete LM2575-5.0BU with active product status and RoHS3 compliance, select LM2575-5.0WU from Microchip Technology. This part maintains identical electrical specifications and package configuration while offering current production availability and regulatory compliance.

For Texas Instruments alternatives, TL2575-05IKTTR and TL2575-05IKTTRG3 provide 1A output current with active product status and ROHS3 compliance. These parts differ only in packaging format (Cut Tape vs. Tape & Reel).

For applications requiring higher output current capacity, the LM2592HVS-5.0/NOPB and LM2592HVSX-5.0/NOPB deliver 2A output with extended input voltage range to 60V and higher switching frequency at 150kHz. The LM2596S-5.0/NOPB and LM2596SX-5.0/NOPB provide 3A output current with the same extended specifications.

The AP1506-50K5G-13 from Diodes Incorporated offers 3A output but operates with a reduced input voltage maximum of 22V and narrower operating temperature range (-20°C to 85°C), making it suitable only for applications within these constraints.

Frequently Asked Questions (FAQ)

Q: Can LM2575-5.0WU be used as a direct replacement for LM2575-5.0BU?

A: Yes. Both parts share identical electrical specifications: 5V fixed output, 1A current rating, 4V to 40V input range, 52kHz switching frequency, and TO-263-6 D2PAK package. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. Non-compliant).

Q: What is the difference between TL2575-05IKTTR and TL2575-05IKTTRG3?

A: Both parts are functionally identical with 1A output, 52kHz switching frequency, and -40°C to 125°C operating range. The difference is packaging: TL2575-05IKTTR is supplied in Cut Tape & Digi-Reel format, while TL2575-05IKTTRG3 is supplied in Tape & Reel format.

Q: Can higher current-rated parts like LM2592 or LM2596 replace the 1A LM2575?

A: Yes, from an electrical compatibility standpoint. These parts maintain 5V fixed output and TO-263-6 D2PAK package compatibility. However, they operate at higher switching frequencies (150kHz vs. 52kHz) and have different input voltage specifications. Design validation is necessary to confirm suitability for specific applications.

Q: Is the AP1506-50K5G-13 suitable as a replacement?

A: The AP1506-50K5G-13 provides 3A output and ROHS3 compliance but has a reduced maximum input voltage of 22V (vs. 40V for the LM2575-5.0BU) and a narrower operating temperature range of -20°C to 85°C. It is suitable only for applications operating within these electrical and thermal constraints.

Q: What does "Last Time Buy" status mean for the AP1506-50K5G-13?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this part. Existing inventory is available, but no future production is planned. This part should be considered for legacy system support only.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use the TO-263-6 D2PAK (5 Leads + Tab) package, ensuring mechanical and electrical pin compatibility with the LM2575-5.0BU.