LM2575S-5.0 Equivalent & Substitute Parts

Part Overview

The LM2575S-5.0 is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. It delivers a fixed 5V output at 1A from input voltages ranging from 4V to 40V, operating at a 52kHz switching frequency. The device is housed in a TO-263-6 (D2PAK) surface mount package and is compliant with RoHS3 and REACH standards.

The LM2575S-5.0 is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or design revisions.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2575S-5.0
Manufacturer	Texas Instruments
Function	Step-Down (Buck)
Output Voltage	5V Fixed
Output Current	1A
Input Voltage Range	4V to 40V
Switching Frequency	52kHz
Operating Temperature	-40°C to 125°C (TJ)
Package	TO-263-6, D2PAK (5 Leads + Tab)
Mounting Type	Surface Mount
RoHS Status	RoHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution of the LM2575S-5.0 is determined by the following critical parameters:

Output Voltage: Must be fixed at 5V
Package: Must be TO-263-6 (D2PAK) or equivalent footprint
Output Current Rating: Minimum 1A (higher ratings are acceptable for drop-in replacement)
Input Voltage Range: Minimum 4V to 40V compatibility
Switching Frequency: 52kHz operation (alternative frequencies acceptable if within design tolerance)
Operating Temperature: -40°C to 125°C range (wider ranges acceptable)
Compliance: RoHS3 and REACH compliance required

Substitute parts are grouped into two categories:

Category 1: Direct Equivalents (1A Output) Parts with identical 1A output current rating and matching electrical specifications.

Category 2: Higher Current Alternatives (3A to 5A Output) Parts with increased output current capability, suitable for designs requiring additional headroom or future scaling.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Min-Max)	Switching Frequency	Operating Temperature	Package	Product Status
LM2575S-5.0	Texas Instruments	1A	4V - 40V	52kHz	-40°C to 125°C	TO-263-6	Last Time Buy
LM2575S-5.0/NOPB	Texas Instruments	1A	4V - 40V	52kHz	-40°C to 125°C	TO-263-6	Active
LM2575-5.0WU-TR	Microchip Technology	1A	4V - 40V	52kHz	-40°C to 125°C	TO-263-6	Active
LM2575D2T-5G	onsemi	1A	4.75V - 40V	52kHz	-40°C to 125°C	D2PAK-5	Active
LM2575D2T-5R4G	onsemi	1A	4.75V - 40V	52kHz	-40°C to 125°C	D2PAK-5	Active
LM2576-5.0WU	Microchip Technology	3A	4V - 40V	52kHz	-40°C to 125°C	TO-263-6	Active
LM2576-5.0WU-TR	Microchip Technology	3A	4V - 40V	52kHz	-40°C to 125°C	TO-263-6	Active
LM2576D2T-005G	onsemi	3A	7V - 40V	52kHz	-40°C to 125°C	D2PAK-5	Active
AP1501-50K5G-13	Diodes Incorporated	3A	4.5V - 40V	150kHz	-20°C to 85°C	TO-263-6	Active
AP1501A-50K5G-13	Diodes Incorporated	5A	4.5V - 40V	150kHz	-20°C to 85°C	TO-263-6	Active
AP1506-50K5G-13	Diodes Incorporated	3A	4.5V - 22V	150kHz	-20°C to 85°C	TO-263-6	Last Time Buy

Engineering Selection Recommendations

For Direct Replacement (Active Status, Identical Specifications):

LM2575S-5.0/NOPB is the primary recommended substitute. It is manufactured by Texas Instruments, maintains identical electrical and thermal specifications, and is in Active product status. This part provides the most seamless transition from the Last Time Buy LM2575S-5.0.

For Alternative Manufacturers (Active Status, Identical Specifications):

LM2575-5.0WU-TR (Microchip Technology) and LM2575D2T-5G or LM2575D2T-5R4G (onsemi) are functionally equivalent alternatives. All three maintain the 1A output current, 52kHz switching frequency, and -40°C to 125°C operating range. The onsemi variants feature improved moisture sensitivity (MSL 1 vs. MSL 3), providing enhanced reliability in humid environments.

For Higher Current Capability (Active Status, 3A Output):

LM2576-5.0WU and LM2576-5.0WU-TR (Microchip Technology) provide 3A output current while maintaining the 4V to 40V input range and 52kHz switching frequency. These are suitable for designs requiring additional current headroom or future scaling without topology changes.

LM2576D2T-005G (onsemi) offers 3A output with the same switching frequency but requires a minimum input voltage of 7V. This part is suitable only for applications where the input voltage floor is 7V or higher.

For Alternative Switching Frequency (Active Status, Higher Current):

AP1501-50K5G-13 and AP1501A-50K5G-13 (Diodes Incorporated) operate at 150kHz with 3A and 5A output respectively. The higher switching frequency may reduce external component size but operates at a narrower temperature range (-20°C to 85°C). AP1506-50K5G-13 is in Last Time Buy status and should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can I use LM2576-5.0WU as a direct replacement for LM2575S-5.0?

A: Yes, with design considerations. Both parts share identical input voltage range (4V to 40V), output voltage (5V), switching frequency (52kHz), and operating temperature (-40°C to 125°C). The LM2576 provides 3A output versus 1A, making it a suitable upgrade. No PCB layout changes are required as both use the TO-263-6 package. However, verify that your application's feedback network and external components are rated for the higher current capability.

Q: What is the difference between LM2575D2T-5G and LM2575D2T-5R4G?

A: Both parts are electrically identical. The primary difference is packaging: LM2575D2T-5G is supplied in Tube packaging, while LM2575D2T-5R4G is supplied in Cut Tape (CT) & Digi-Reel® format. Select based on your procurement and assembly requirements. LM2575D2T-5R4G offers higher inventory availability (17,423 pcs vs. 4,344 pcs).

Q: Why do AP1501 series parts operate at 150kHz instead of 52kHz?

A: The AP1501 series from Diodes Incorporated uses a higher switching frequency (150kHz) compared to the LM2575/LM2576 series (52kHz). Higher switching frequency allows for smaller external inductors and capacitors, reducing board space. However, this may increase switching losses and EMI. Verify that your PCB layout and filtering design accommodate the higher frequency before substitution.

Q: Can I use AP1506-50K5G-13 for new designs?

A: No. AP1506-50K5G-13 is in Last Time Buy status, indicating end-of-life production. For new designs, select from parts with Active product status: LM2575S-5.0/NOPB, LM2575-5.0WU-TR, LM2575D2T-5G, LM2576-5.0WU, or Diodes Incorporated alternatives.

Q: What is the impact of the onsemi parts having MSL 1 instead of MSL 3?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without baking, while MSL 3 requires baking after 168 hours of exposure to moisture. onsemi parts (LM2575D2T-5G, LM2575D2T-5R4G, LM2576D2T-005G) offer superior moisture tolerance, reducing handling and storage requirements. This is advantageous for high-volume manufacturing or extended storage periods.

Q: Are all substitute parts RoHS3 and REACH compliant?

A: Yes. All substitute parts listed are RoHS3 Compliant and REACH Unaffected, matching the compliance profile of the LM2575S-5.0.

Q: What is the minimum input voltage for LM2576D2T-005G?

A: LM2576D2T-005G requires a minimum input voltage of 7V, compared to 4V for other LM2575/LM2576 variants. This part is suitable only for applications where the input voltage is guaranteed to remain at 7V or above. For lower input voltages, select LM2576-5.0WU or LM2576-5.0WU-TR.

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