LM2576HVT-12 Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The LM2576HVT-12 is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. It delivers a fixed 12V output at 3A from input voltages ranging from 4V to 60V, operating at 52kHz switching frequency. The main part is currently in Last Time Buy status, making equivalent and substitute parts necessary for ongoing design support and procurement planning. Alternative parts maintain the same functional specifications while offering different availability, manufacturer options, and lead configurations.

Key Parameters

Parameter	Value
Function	Step-Down (Buck)
Output Voltage (Fixed)	12V
Output Current	3A
Input Voltage Range	4V to 60V
Switching Frequency	52kHz
Package Type	TO-220-5
Operating Temperature	-40°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across electrical and mechanical specifications. The primary substitution criteria are:

Fixed 12V output voltage
3A output current capability
TO-220-5 package configuration
52kHz switching frequency
Buck topology with positive output configuration
Operating temperature range of -40°C to 125°C
RoHS3 compliance

Parts are grouped into three categories: direct manufacturer equivalents from Texas Instruments, cross-manufacturer alternatives from Microchip Technology and onsemi, and variants with different lead configurations or reduced input voltage ratings.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Package	Status	Inventory
LM2576HVT-12	Texas Instruments	3A	60V	TO-220-5	Last Time Buy	5316 Pcs
LM2576HVT-12/NOPB	Texas Instruments	3A	60V	TO-220-5	Active	16162 Pcs
LM2576HVT-12/LF03	Texas Instruments	3A	60V	TO-220-5 Formed Leads	Active	1013 Pcs
LM2576-12WT	Microchip Technology	3A	40V	TO-220-5	Active	1008 Pcs
LM2576T-012G	onsemi	3A	40V	TO-220-5	Obsolete	10100 Pcs
LM2575-12WT	Microchip Technology	1A	40V	TO-220-5	Active	7200 Pcs

Engineering Selection Recommendations

Primary Substitute: LM2576HVT-12/NOPB

The LM2576HVT-12/NOPB from Texas Instruments is the manufacturer-recommended direct equivalent. It maintains identical electrical specifications (3A output, 60V input maximum, 12V fixed output) and package configuration. Product status is Active with highest inventory availability (16162 units), ensuring long-term supply continuity. This part is the preferred choice for direct replacement in existing designs.

Alternative Substitute: LM2576HVT-12/LF03

The LM2576HVT-12/LF03 is functionally equivalent with formed leads configuration. Electrical specifications remain identical to the main part. This variant is suitable for applications requiring pre-formed leads for automated assembly processes. Product status is Active with adequate inventory (1013 units).

Cross-Manufacturer Options: LM2576-12WT and LM2576T-012G

The LM2576-12WT from Microchip Technology and LM2576T-012G from onsemi provide functional equivalence with reduced input voltage maximum rating (40V versus 60V). These parts are suitable only for applications where input voltage does not exceed 40V. The LM2576-12WT is Active status with 1008 units in stock. The LM2576T-012G is Obsolete status and should not be selected for new designs despite available inventory.

Reduced Current Alternative: LM2575-12WT

The LM2575-12WT from Microchip Technology delivers 1A output current versus 3A. This part is suitable only for applications requiring maximum 1A output current. Input voltage is limited to 40V maximum. Product status is Active with 7200 units available. This part is not a direct substitute for 3A applications.

Frequently Asked Questions (FAQ)

Q: Can LM2576HVT-12/NOPB be used as a direct replacement for LM2576HVT-12?

A: Yes. The LM2576HVT-12/NOPB is the manufacturer-recommended equivalent with identical electrical and mechanical specifications. The /NOPB suffix indicates lead-free plating. Both parts are RoHS3 compliant and operate identically in circuit.

Q: What is the difference between LM2576HVT-12 and LM2576HVT-12/LF03?

A: The /LF03 variant features formed leads suitable for automated insertion equipment. Electrical performance is identical. The formed leads configuration may require different handling in manual assembly processes.

Q: Can LM2576-12WT replace LM2576HVT-12 in all applications?

A: The LM2576-12WT is suitable only for applications where input voltage does not exceed 40V. The main part supports input voltages up to 60V. If your application requires the full 60V input range, the LM2576-12WT is not compatible.

Q: Why is LM2576T-012G listed as Obsolete?

A: The LM2576T-012G from onsemi has reached end-of-life status. Although inventory is available, new designs should not incorporate this part. Use Active status alternatives such as LM2576HVT-12/NOPB or LM2576-12WT instead.

Q: Is LM2575-12WT a suitable substitute?

A: The LM2575-12WT is not a direct substitute. It delivers 1A maximum output current compared to 3A for the main part. Use this part only in applications requiring 1A or less output current.

Q: What compliance certifications apply to all substitute parts?

A: All listed parts are RoHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (Unlimited) for all parts except LM2576T-012G (Not Applicable). All parts carry ECCN EAR99 classification.

Q: Which substitute offers the best long-term availability?

A: LM2576HVT-12/NOPB from Texas Instruments offers the highest inventory (16162 units) and Active product status, ensuring continued availability for future procurement.

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