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LM2576T-ADJ Buck Switching Regulator IC Equivalent & Substitute Parts
Part Overview
The LM2576T-ADJ is a buck switching regulator IC manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This positive adjustable step-down regulator delivers 3A output current with an adjustable output voltage range from 1.23V to 37V, operating from a 4V to 40V input supply. The device is packaged in TO-220-5 through-hole configuration and operates across the industrial temperature range of -40°C to 125°C. Currently in Last Time Buy status with 28,700 units in stock, alternative equivalent parts are necessary for long-term design continuity and supply chain flexibility.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LM2576T-ADJ |
| Category | Power Management (PMIC) |
| Function | Step-Down (Buck) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 4V |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 1.23V |
| Voltage - Output (Max) | 37V |
| Current - Output | 3A |
| Frequency - Switching | 52kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C to 125°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | TO-220-5 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution eligibility for the LM2576T-ADJ is determined by strict alignment of the following critical parameters:
Primary Substitution Criteria:
- Function: Step-Down (Buck) topology
- Output Configuration: Positive output
- Output Type: Adjustable voltage
- Number of Outputs: Single output
- Voltage - Output (Min/Fixed): 1.23V minimum
- Voltage - Output (Max): 37V maximum
- Current - Output: 3A minimum rating
- Frequency - Switching: 52kHz
- Operating Temperature: -40°C to 125°C
- Package / Case: TO-220-5 form factor
- Mounting Type: Through Hole
- RoHS Status: ROHS3 Compliant
Substitute Categories:
Category 1: Direct Texas Instruments Equivalents Parts LM2576T-ADJ/LF02 and LM2576T-ADJ/NOPB are direct equivalents from the original manufacturer, differing only in lead formation (formed leads) or packaging designation. These maintain identical electrical specifications and are fully interchangeable.
Category 2: onsemi Equivalents (3A Output) Parts LM2576T-ADJG and LM2576TV-ADJG are onsemi-manufactured equivalents with identical 3A output current rating. These parts maintain the same base product number (LM2576) and electrical performance. The "TV" variant includes formed leads. Output configuration is listed as "Positive or Negative," indicating broader application flexibility while maintaining positive output capability.
Category 3: Lower Current Alternative (1A Output) Part LM2575TV-ADJG is a onsemi-manufactured variant with reduced output current rating of 1A. This part is suitable only for applications requiring 1A or less output current and represents a downgrade in current capacity.
Parameter Comparison
| Parameter | LM2576T-ADJ (TI) | LM2576T-ADJ/LF02 (TI) | LM2576T-ADJ/NOPB (TI) | LM2576T-ADJG (onsemi) | LM2576TV-ADJG (onsemi) | LM2575TV-ADJG (onsemi) |
|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | onsemi | onsemi |
| Function | Step-Down | Step-Down | Step-Down | Step-Down | Step-Down | Step-Down |
| Output Configuration | Positive | Positive | Positive | Positive or Negative | Positive or Negative | Positive |
| Output Type | Adjustable | Adjustable | Adjustable | Adjustable | Adjustable | Adjustable |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Input (Min) | 4V | 4V | 4V | 7V | 7V | 4.75V |
| Voltage - Input (Max) | 40V | 40V | 40V | 40V | 40V | 40V |
| Voltage - Output (Min/Fixed) | 1.23V | 1.23V | 1.23V | 1.23V | 1.23V | 1.23V |
| Voltage - Output (Max) | 37V | 37V | 37V | 37V | 37V | 37V |
| Current - Output | 3A | 3A | 3A | 3A | 3A | 1A |
| Frequency - Switching | 52kHz | 52kHz | 52kHz | 52kHz | 52kHz | 52kHz |
| Synchronous Rectifier | No | No | No | No | No | No |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | TO-220-5 | TO-220-5 Formed Leads | TO-220-5 | TO-220-5 | TO-220-5 Formed Leads | TO-220-5 Formed Leads |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
| Product Status | Last Time Buy | Active | Active | Active | Active | Active |
| Inventory (Pcs) | 28,700 | 1,294 | 50,200 | 6,670 | 9,655 | 3,312 |
Engineering Selection Recommendations
Full Equivalents (Recommended for Direct Replacement):
LM2576T-ADJ/NOPB and LM2576T-ADJ/LF02 are the primary recommended substitutes. Both are Texas Instruments products maintaining Active product status, ensuring long-term availability and support. LM2576T-ADJ/NOPB offers the highest inventory level (50,200 units) and is designated as the manufacturer-recommended part. LM2576T-ADJ/LF02 provides an alternative with formed leads and adequate stock (1,294 units).
onsemi Equivalents (Alternative Manufacturers):
LM2576T-ADJG and LM2576TV-ADJG are onsemi-manufactured equivalents with Active product status. Both maintain identical 3A output current and electrical specifications. The primary difference from the original LM2576T-ADJ is the minimum input voltage specification (7V versus 4V). Applications operating above 7V input voltage can use these parts without restriction. LM2576TV-ADJG includes formed leads and carries higher inventory (9,655 units) compared to LM2576T-ADJG (6,670 units).
Lower Current Alternative:
LM2575TV-ADJG is suitable only for applications requiring maximum 1A output current. This part has a reduced current rating and should not be used in designs requiring the full 3A capability of the original LM2576T-ADJ.
Compliance and Certification:
All substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original part's regulatory requirements. All parts operate across the full -40°C to 125°C temperature range.
Frequently Asked Questions (FAQ)
Q: Can LM2576T-ADJ/NOPB be used as a direct replacement for LM2576T-ADJ?
A: Yes. LM2576T-ADJ/NOPB is a direct Texas Instruments equivalent with identical electrical specifications, operating range, and package configuration. The "/NOPB" designation indicates no plumbum (lead-free) processing and is the manufacturer-recommended part for new designs.
Q: What is the difference between LM2576T-ADJG and LM2576TV-ADJG?
A: Both are onsemi equivalents with identical electrical performance and 3A output current. The primary difference is lead formation: LM2576TV-ADJG includes formed leads (indicated by "TV"), while LM2576T-ADJG has standard leads. LM2576TV-ADJG is recommended for applications requiring formed leads for improved mechanical stability.
Q: Can onsemi parts (LM2576T-ADJG, LM2576TV-ADJG) replace the original Texas Instruments LM2576T-ADJ?
A: Yes, with one consideration: onsemi parts specify a minimum input voltage of 7V, compared to 4V for the Texas Instruments original. If your application operates at input voltages between 4V and 7V, use Texas Instruments parts. For input voltages of 7V and above, onsemi equivalents are fully compatible.
Q: Is LM2575TV-ADJG suitable for my application?
A: LM2575TV-ADJG is suitable only if your design requires a maximum output current of 1A or less. This part has a reduced current rating compared to the original 3A specification. Do not use this part in applications requiring the full 3A output current capability.
Q: What does "Last Time Buy" status mean for the original LM2576T-ADJ?
A: Last Time Buy indicates that Texas Instruments will discontinue this part number. Existing inventory (28,700 units) represents the final available stock. For new designs or long-term production, select an Active substitute part such as LM2576T-ADJ/NOPB or an onsemi equivalent.
Q: Are all substitute parts RoHS and REACH compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the regulatory requirements of the original LM2576T-ADJ.
Q: What is the difference between TO-220-5 and TO-220-5 Formed Leads?
A: Both are TO-220-5 package configurations. Formed leads (indicated by "TV" or "/LF02" designations) have pre-bent leads for improved mechanical fit in through-hole applications. Standard leads are straight. Both are electrically and functionally equivalent; the choice depends on PCB design and assembly requirements.
Q: Can I use multiple substitute parts interchangeably in production?
A: Yes, provided your application meets the input voltage requirements. For designs operating at 7V or above, LM2576T-ADJ/NOPB, LM2576T-ADJ/LF02, LM2576T-ADJG, and LM2576TV-ADJG are fully interchangeable. Maintain consistent part selection within a production run to ensure supply chain continuity.
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