LM2575HVSX-5.0 Buck Switching Regulator Equivalent & Substitute Parts

Part Overview

The LM2575HVSX-5.0 is a buck switching regulator IC from Texas Instruments, delivering fixed 5V output at 1A with input voltage range of 4V to 60V. This part is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. Identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and production sustainability.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM2575HVSX-5.0
Function	Step-Down (Buck)
Output Voltage	5V Fixed
Output Current	1A
Input Voltage Range	4V to 60V
Switching Frequency	52kHz
Package	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature	-40°C to 125°C (TJ)
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Output voltage specification (5V fixed)
Output current capability (minimum 1A)
Input voltage range compatibility (minimum 4V, maximum 60V or higher)
Package type (TO-263-6, D2PAK with 5 leads + tab)
Operating temperature range (-40°C to 125°C or equivalent)
Topology (buck converter)
RoHS3 compliance

Substitute parts are grouped into two categories:

Category A: Direct Equivalents – Parts with identical or superior electrical specifications and matching package, suitable for direct replacement without circuit modification.

Category B: Functional Equivalents – Parts with higher output current capability or different input voltage ranges, requiring design review but offering enhanced performance or supply availability.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Min)	Input Voltage (Max)	Switching Frequency	Package	Operating Temp	Product Status
LM2575HVSX-5.0	Texas Instruments	5V	1A	4V	60V	52kHz	TO-263-6	-40°C to 125°C	Last Time Buy
LM2575HVSX-5.0/NOPB	Texas Instruments	5V	1A	4V	60V	52kHz	TO-263-6	-40°C to 125°C	Active
LM2575-5.0WU	Microchip Technology	5V	1A	4V	40V	52kHz	TO-263-6	-40°C to 125°C	Active
LM2575-5.0WU-TR	Microchip Technology	5V	1A	4V	40V	52kHz	TO-263-6	-40°C to 125°C	Active
LM2575D2T-5G	onsemi	5V	1A	4.75V	40V	52kHz	TO-263-6	-40°C to 125°C	Active
LM2575D2T-5R4G	onsemi	5V	1A	4.75V	40V	52kHz	TO-263-6	-40°C to 125°C	Active
NCV2575D2T-5R4G	onsemi	5V	1A	4.75V	40V	52kHz	TO-263-6	-40°C to 125°C	Obsolete
AP1506-50K5G-13	Diodes Incorporated	5V	3A	4.5V	22V	150kHz	TO-263-6	-20°C to 85°C	Last Time Buy
LM2576D2T-005G	onsemi	5V	3A	7V	40V	52kHz	TO-263-6	-40°C to 125°C	Active
LM2576D2TR4-5G	onsemi	5V	3A	7V	40V	52kHz	TO-263-6	-40°C to 125°C	Active

Engineering Selection Recommendations

Primary Recommendation: LM2575HVSX-5.0/NOPB (Texas Instruments)

This part is the direct equivalent with identical electrical specifications and Active product status. It provides the highest supply availability (16,782 units in stock) and maintains full compatibility with existing designs. Recommended for immediate procurement to replace Last Time Buy inventory.

Secondary Recommendation: LM2575D2T-5R4G (onsemi)

This part matches all critical parameters with Active status and substantial inventory (17,423 units). The onsemi LM2575 series maintains the same base product number, switching frequency, and temperature range. Input voltage range is reduced to 40V maximum, which is acceptable for applications not requiring the full 60V input capability of the original part.

Tertiary Recommendation: LM2575-5.0WU-TR (Microchip Technology)

This Microchip variant offers Active status with 1,484 units available. It maintains identical output specifications and operating temperature range. Input voltage maximum is 40V, suitable for standard buck converter applications within this voltage window.

Higher Current Alternative: LM2576D2TR4-5G (onsemi)

For applications requiring increased output current capacity, the LM2576 series delivers 3A output at 5V with Active status and 35,300 units in stock. This part requires minimum 7V input voltage and is suitable for designs where higher current delivery is beneficial. Thermal management and PCB layout may require adjustment due to increased current handling.

Not Recommended: AP1506-50K5G-13 (Diodes Incorporated)

Although this part offers 3A output capability, it is classified as Last Time Buy with limited inventory (2,333 units). Input voltage range is restricted to 4.5V to 22V, making it unsuitable for applications requiring the original 60V input capability. Operating temperature range is also reduced to -20°C to 85°C.

Not Recommended: NCV2575D2T-5R4G (onsemi)

This part is classified as Obsolete and should not be selected for new designs or long-term production planning, despite matching electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can LM2575D2T-5R4G replace LM2575HVSX-5.0 in all applications?

A: LM2575D2T-5R4G is compatible for applications with input voltage up to 40V. If your design requires the full 4V to 60V input range of the original part, this substitute is not suitable. Verify your actual input voltage requirements before selection.

Q: What is the difference between LM2575-5.0WU and LM2575-5.0WU-TR?

A: Both parts are electrically identical. The difference is packaging: LM2575-5.0WU is supplied in Tube packaging, while LM2575-5.0WU-TR is supplied in Tape & Reel format. Select based on your assembly process requirements.

Q: Why is LM2576D2TR4-5G listed as a substitute if it has 3A output instead of 1A?

A: The LM2576 series is a higher-current variant of the same buck regulator family with identical 5V output and 52kHz switching frequency. It is electrically compatible and can be used as a drop-in replacement. The increased current capability provides design margin and is not detrimental to applications requiring only 1A.

Q: Is the AP1506-50K5G-13 suitable for high-voltage input applications?

A: No. The AP1506 maximum input voltage is 22V, significantly lower than the original part's 60V capability. This part is only suitable for applications with input voltages below 22V.

Q: Can I use NCV2575D2T-5R4G for new production?

A: No. This part is classified as Obsolete and should not be used for new designs or production. Select from Active status parts such as LM2575D2T-5R4G or LM2575HVSX-5.0/NOPB.

Q: What are the key parameters I must verify before substitution?

A: Verify the following: (1) Input voltage range of your application falls within the substitute part's minimum and maximum ratings, (2) Output current requirement does not exceed the substitute part's rating, (3) Operating temperature range of your application is within the substitute part's specification, (4) Package type matches your PCB layout and assembly process.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference are RoHS3 compliant and meet REACH requirements.

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