LM2576S-5.0 Equivalent & Substitute Parts

Part Overview

The LM2576S-5.0 is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. It delivers a fixed 5V output at 3A maximum current from input voltages ranging from 4V to 40V. The device operates at 52kHz switching frequency and is housed in a TO-263-6 (D2PAK) surface mount package. This part is currently in Last Time Buy status, making equivalent and substitute parts essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM2576S-5.0
Function	Step-Down (Buck)
Output Voltage	5V Fixed
Output Current	3A
Input Voltage Range	4V to 40V
Switching Frequency	52kHz
Package	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature	-40°C to 125°C (TJ)
RoHS Status	ROHS3 Compliant
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the LM2576S-5.0 is determined by the following critical parameters:

Output voltage: 5V fixed
Output current capability: 3A minimum
Input voltage range: 4V to 40V minimum
Package compatibility: TO-263-6 / D2PAK (5 Leads + Tab)
Switching frequency: 52kHz
Operating temperature range: -40°C to 125°C
Topology: Buck (step-down)
Output configuration: Positive

Substitute parts are grouped into two categories based on output current rating:

Category A (3A Output Current): Direct replacements with identical 3A output capability. These parts maintain full functional equivalence with the LM2576S-5.0.

Category B (1A Output Current): Reduced current alternatives. These parts are suitable only for applications where maximum output current does not exceed 1A, despite identical voltage and package specifications.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Min)	Input Voltage (Max)	Package	Product Status	Packaging Type
LM2576S-5.0	Texas Instruments	3A	4V	40V	TO-263-6	Last Time Buy	Tube
LM2576S-5.0/NOPB	Texas Instruments	3A	4V	40V	TO-263-6	Active	Tube
LM2576-5.0WU-TR	Microchip Technology	3A	4V	40V	TO-263-6	Active	Tape & Reel
LM2576D2T-005G	onsemi	3A	7V	40V	TO-263-6	Active	Tube
LM2576D2TR4-5G	onsemi	3A	7V	40V	TO-263-6	Active	Cut Tape & Digi-Reel
LM2575-5.0WU	Microchip Technology	1A	4V	40V	TO-263-6	Active	Tube
LM2575-5.0WU-TR	Microchip Technology	1A	4V	40V	TO-263-6	Active	Tape & Reel
LM2575D2T-5G	onsemi	1A	4.75V	40V	TO-263-6	Active	Tube
LM2575D2T-5R4G	onsemi	1A	4.75V	40V	TO-263-6	Active	Cut Tape & Digi-Reel
NCV2575D2T-5R4G	onsemi	1A	4.75V	4.75V	TO-263-6	Obsolete	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (3A Output Current Required):

LM2576S-5.0/NOPB is the primary recommended substitute. It is manufactured by Texas Instruments, maintains identical electrical specifications, and carries Active product status with ROHS3 compliance. This part provides continuity with the original design without modification.

LM2576-5.0WU-TR (Microchip Technology) is an alternative 3A substitute with Active status and ROHS3 compliance. It maintains the 4V minimum input voltage specification and is available in Tape & Reel packaging for high-volume applications.

LM2576D2T-005G and LM2576D2TR4-5G (onsemi) are 3A alternatives with Active status and ROHS3 compliance. These parts have a 7V minimum input voltage specification, which restricts their use to applications where the input voltage does not fall below 7V. They offer unlimited moisture sensitivity level (MSL 1) compared to the original part's MSL 3.

For Reduced Current Applications (1A Output Current Acceptable):

LM2575-5.0WU and LM2575-5.0WU-TR (Microchip Technology) are 1A alternatives with Active status, ROHS3 compliance, and 4V minimum input voltage matching the original specification. These parts are suitable only for designs where maximum output current does not exceed 1A.

LM2575D2T-5G and LM2575D2T-5R4G (onsemi) are 1A alternatives with Active status, ROHS3 compliance, and MSL 1 rating. The 4.75V minimum input voltage is slightly higher than the original 4V specification.

Parts to Avoid:

NCV2575D2T-5R4G carries Obsolete product status and should not be selected for new designs or long-term procurement.

Frequently Asked Questions (FAQ)

Q: Can I use a 1A part as a substitute for the LM2576S-5.0?

A: Only if your application's maximum output current requirement does not exceed 1A. The LM2576S-5.0 is rated for 3A output current. Using a 1A-rated part (LM2575 series) in a 3A application will cause the regulator to exceed its current rating and may result in thermal shutdown or device failure.

Q: What is the difference between LM2576S-5.0 and LM2576S-5.0/NOPB?

A: The /NOPB suffix indicates "No Plumbum" (lead-free) packaging. Both parts are electrically identical and meet ROHS3 compliance. The primary difference is packaging format: LM2576S-5.0 is supplied in Tube packaging, while LM2576S-5.0/NOPB is also supplied in Tube but with lead-free solder.

Q: Why do onsemi parts (LM2576D2T-005G) have a 7V minimum input voltage instead of 4V?

A: This is a specification difference between manufacturers. The onsemi variant requires a minimum 7V input voltage, making it unsuitable for applications with input voltages between 4V and 7V. Verify your application's input voltage range before selecting this substitute.

Q: Are Tape & Reel packaged parts electrically equivalent to Tube packaged parts?

A: Yes. Tape & Reel (TR) and Cut Tape & Digi-Reel (CT) packaging formats contain electrically identical components. The packaging difference affects only handling, storage, and automated assembly compatibility. Select based on your manufacturing process requirements.

Q: Can I substitute the LM2576S-5.0 with a part from a different manufacturer?

A: Yes, provided the substitute meets all critical parameters: 5V fixed output, 3A minimum output current, 4V to 40V input range, TO-263-6 package, and -40°C to 125°C operating temperature. Microchip Technology and onsemi both offer qualified alternatives with Active product status.

Q: What does "Last Time Buy" status mean for the LM2576S-5.0?

A: Last Time Buy indicates that Texas Instruments will no longer manufacture this part after a specified date. Existing inventory may be available, but new production has ended. Identifying and qualifying substitute parts is essential for long-term product support.

Q: Is the LM2575 series a true substitute for the LM2576 series?

A: The LM2575 and LM2576 series share identical topology, voltage specifications, and package compatibility. The primary difference is output current rating: LM2575 is rated for 1A, while LM2576 is rated for 3A. Use LM2575 only in applications where 1A output current is sufficient.

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