LM2576WU-TR Equivalent & Substitute Parts

Part Overview

The LM2576WU-TR is an active buck switching regulator IC manufactured by Microchip Technology, designed for positive adjustable output applications. This surface-mount component operates across a 4V to 40V input range with a 3A output capacity and 52kHz switching frequency. The part is actively produced and RoHS3 compliant, making it suitable for modern power management applications requiring step-down voltage conversion with adjustable output levels.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges, allowing for design flexibility, supply chain optimization, or inventory management.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2576WU-TR
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Function	Step-Down (Buck)
Output Configuration	Positive
Output Type	Adjustable
Voltage - Input (Min)	4V
Voltage - Input (Max)	40V
Voltage - Output (Min/Fixed)	1.23V
Voltage - Output (Max)	37V
Current - Output	3A
Frequency - Switching	52kHz
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature	-40°C ~ 125°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the LM2576WU-TR is determined by the following critical parameters:

Primary Compatibility Criteria:

Output configuration: Positive adjustable
Minimum output voltage: 1.23V
Package type: TO-263-6, D2PAK (5 Leads + Tab)
Mounting type: Surface Mount
RoHS3 compliance and active product status

Secondary Compatibility Criteria:

Input voltage range: Minimum 4V, maximum 40V
Output current capacity: 3A
Operating temperature range: -40°C to 125°C
Switching frequency: 52kHz or higher

Substitute parts are grouped into two categories:

Category A - Full Electrical Equivalents (3A Output): Parts maintaining 3A output current with input voltage range of 4V to 40V and identical package configuration. These include AP1501-K5G-13, LM2596DSADJG, and LM2596DSADJR4G.

Category B - Reduced Current Alternatives (1A Output): Parts with 1A output current instead of 3A, suitable only for applications not requiring the full 3A capacity. These include LM2575S-ADJ/NOPB, LM2575SX-ADJ/NOPB, and TL2575-ADJIKTTR.

Category C - Extended Voltage Range (1A Output): TL2575HV-ADJIKTTR extends the maximum input and output voltage to 60V and 57V respectively, with 1A output current.

Parameter Comparison

Parameter	LM2576WU-TR	AP1501-K5G-13	LM2596DSADJG	LM2596DSADJR4G	LM2575S-ADJ/NOPB	LM2575SX-ADJ/NOPB	TL2575-ADJIKTTR	TL2575HV-ADJIKTTR
Manufacturer	Microchip	Diodes Inc.	onsemi	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Function	Step-Down	Step-Down	Step-Up, Step-Down, Step-Up/Step-Down	Step-Up, Step-Down, Step-Up/Step-Down	Step-Down	Step-Down	Step-Down	Step-Down
Output Configuration	Positive	Positive	Positive or Negative	Positive or Negative	Positive	Positive	Positive	Positive
Voltage - Input (Min)	4V	4.5V	4.5V	4.5V	4V	4V	4.75V	4.75V
Voltage - Input (Max)	40V	40V	40V	40V	40V	40V	40V	60V
Voltage - Output (Min/Fixed)	1.23V	1.23V	1.23V	1.23V	1.23V	1.23V	1.23V	1.23V
Voltage - Output (Max)	37V	37V	37V	37V	37V	37V	37V	57V
Current - Output	3A	3A	3A	3A	1A	1A	1A	1A
Frequency - Switching	52kHz	150kHz	150kHz	150kHz	52kHz	52kHz	52kHz	52kHz
Operating Temperature	-40°C ~ 125°C	-20°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct 3A Replacement (Full Electrical Equivalence):

AP1501-K5G-13 (Diodes Incorporated) maintains 3A output capacity with identical input voltage range (4.5V to 40V minimum input vs. 4V for LM2576WU-TR). Operating temperature range is -20°C to 125°C, which is narrower at the lower end. Switching frequency is 150kHz, higher than the original 52kHz. This part is actively produced and RoHS3 compliant.

LM2596DSADJG and LM2596DSADJR4G (onsemi) both provide 3A output with 4.5V to 40V input range and 150kHz switching frequency. Both maintain full -40°C to 125°C operating temperature range. These parts offer additional topology flexibility (buck, boost, buck-boost) and are actively produced with RoHS3 compliance. LM2596DSADJR4G is available in higher quantity (18,965 pcs) compared to LM2596DSADJG (5,200 pcs).

For Reduced Current Applications (1A Output):

LM2575S-ADJ/NOPB and LM2575SX-ADJ/NOPB (Texas Instruments) both deliver 1A output with 4V to 40V input range and 52kHz switching frequency, matching the original switching frequency. Both maintain -40°C to 125°C operating temperature. LM2575SX-ADJ/NOPB has significantly higher inventory (35,200 pcs). These parts are actively produced and RoHS3 compliant.

TL2575-ADJIKTTR (Texas Instruments) provides 1A output with 4.75V minimum input and 52kHz switching frequency. Operating temperature range is -40°C to 125°C. This part is actively produced and RoHS3 compliant.

For Extended Voltage Applications:

TL2575HV-ADJIKTTR (Texas Instruments) extends maximum input voltage to 60V and maximum output voltage to 57V, with 1A output capacity and 52kHz switching frequency. This part is suitable only for applications requiring voltage levels beyond the standard 40V input / 37V output range. Operating temperature range is -40°C to 125°C. The part is actively produced and RoHS3 compliant.

All substitute parts are actively produced, RoHS3 compliant, and maintain the TO-263-6 D2PAK package configuration required for direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can AP1501-K5G-13 be used as a direct replacement for LM2576WU-TR?

A: AP1501-K5G-13 is electrically compatible for applications with input voltage of 4.5V or higher. The minimum input voltage specification is 4.5V versus 4V for the LM2576WU-TR. If your application requires operation below 4.5V input, this substitute is not suitable. Both parts maintain 3A output capacity, identical output voltage range (1.23V to 37V), and the same TO-263-6 D2PAK package.

Q: What is the difference between LM2596DSADJG and LM2596DSADJR4G?

A: Both parts are electrically identical onsemi LM2596 variants with 3A output capacity, 4.5V to 40V input range, and 150kHz switching frequency. The primary difference is packaging: LM2596DSADJG is supplied in Tube packaging, while LM2596DSADJR4G is supplied in Cut Tape & Digi-Reel format. LM2596DSADJR4G has higher inventory availability (18,965 pcs vs. 5,200 pcs).

Q: Can I use a 1A part (LM2575 series) to replace the 3A LM2576WU-TR?

A: LM2575 series parts are suitable only if your application requires 1A or less output current. These parts cannot deliver the full 3A capacity of the LM2576WU-TR. If your design requires 3A output, use AP1501-K5G-13 or LM2596 series parts instead.

Q: Why does AP1501-K5G-13 have a higher switching frequency (150kHz vs. 52kHz)?

A: Higher switching frequency reduces the size of external filter components but may increase switching losses. Both frequencies are within acceptable ranges for buck regulator operation. The higher frequency of AP1501-K5G-13 allows for smaller inductor and capacitor values in the output filter circuit.

Q: Is TL2575HV-ADJIKTTR compatible with standard 40V input applications?

A: Yes. TL2575HV-ADJIKTTR operates across 4.75V to 60V input range, which includes the standard 40V maximum. However, this part delivers only 1A output current, making it unsuitable for applications requiring 3A. Use this part only when extended voltage capability (up to 60V) is required and 1A output is sufficient.

Q: Do all substitute parts use the same package as LM2576WU-TR?

A: Yes. All listed substitute parts use the TO-263-6 D2PAK (5 Leads + Tab) package, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the LM2576WU-TR.

Q: What is the operating temperature difference between LM2576WU-TR and AP1501-K5G-13?

A: LM2576WU-TR operates from -40°C to 125°C, while AP1501-K5G-13 operates from -20°C to 125°C. If your application requires operation below -20°C, AP1501-K5G-13 is not suitable. For standard industrial temperature ranges (-40°C to 125°C), use LM2596 series or LM2575 series parts instead.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message