LM2592HVT-3.3 Equivalent & Substitute Parts

Part Overview

The LM2592HVT-3.3 is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. It delivers a fixed 3.3V output at 2A from input voltages ranging from 4.5V to 60V, operating at 150kHz switching frequency. The device is packaged in TO-220-5 with formed leads for through-hole mounting.

This part is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications requiring 3.3V buck regulation.

Substiute Parts

LM2592HVT-3.3

Texas InstrumentsIn Stock: 5807LM2592HVT-3.3 Datasheet

Current PartRFQ

LM2592HVT-3.3/NOPB

Texas InstrumentsIn Stock: 1067LM2592HVT-3.3/NOPB Datasheet

DirectRFQ

LM2575-3.3WT

Microchip TechnologyIn Stock: 5277LM2575-3.3WT Datasheet

MFR RecommendedRFQ

LM2576T-3.3G

onsemiIn Stock: 3270LM2576T-3.3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2592HVT-3.3 is determined by the following critical parameters:

• Output Voltage: Must be fixed at 3.3V
• Package Type: Must be TO-220-5 for mechanical and thermal compatibility
• Mounting Type: Must be through-hole
• Topology: Must be buck (step-down) configuration
• Output Configuration: Must be positive output
• Operating Temperature Range: Must support -40°C to 125°C
• Input Voltage Compatibility: Substitute must accept the application's input voltage range

Substitute parts are grouped into two categories:

1. Direct Equivalent: Identical electrical specifications and package, differing only in product status or packaging format (tube vs. bulk)
2. Functional Equivalent: Same output voltage and package, with variations in output current rating, input voltage range, or switching frequency that remain compatible with the application

Parameter Comparison

Engineering Selection Recommendations

LM2592HVT-3.3/NOPB (Texas Instruments) is the primary substitute. It maintains identical electrical specifications and package format while offering active product status and ROHS3 compliance. The /NOPB designation indicates lead-free construction. This part is recommended for new designs and ongoing production requiring direct compatibility with the original LM2592HVT-3.3.

LM2575-3.3WT (Microchip Technology) is a functional equivalent suitable for applications where output current requirements do not exceed 1A. It provides active product status and ROHS3 compliance. The reduced switching frequency (52kHz vs. 150kHz) and lower maximum input voltage (40V vs. 60V) must be evaluated against application requirements. This part is appropriate for lower-current designs with input voltages within the 4V to 40V range.

LM2576T-3.3G (onsemi) offers higher output current capability (3A) in the same TO-220-5 package. However, it is classified as obsolete and has a higher minimum input voltage requirement (7V). This part is suitable only for applications with input voltages of 7V or higher and where the 3A output current capacity provides design margin. ROHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can LM2592HVT-3.3/NOPB be used as a direct replacement for LM2592HVT-3.3?

A: Yes. Both parts have identical electrical specifications, output voltage, current rating, input voltage range, switching frequency, and TO-220-5 package. The primary difference is product status (active vs. obsolete) and RoHS compliance. The /NOPB designation indicates lead-free construction.

Q: What is the key limitation when substituting with LM2575-3.3WT?

A: The LM2575-3.3WT has a maximum output current of 1A, compared to 2A for the LM2592HVT-3.3. Applications requiring sustained output currents above 1A cannot use this substitute. Additionally, the maximum input voltage is limited to 40V versus 60V for the original part.

Q: Is LM2576T-3.3G suitable for all applications using LM2592HVT-3.3?

A: No. The LM2576T-3.3G requires a minimum input voltage of 7V, whereas the LM2592HVT-3.3 operates from 4.5V. Applications with input voltages below 7V cannot use this substitute. The part is also classified as obsolete. However, it provides higher output current (3A) for applications within its input voltage range.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts listed are packaged in TO-220-5 configuration suitable for through-hole mounting, maintaining mechanical and thermal compatibility with the original LM2592HVT-3.3.

Q: What compliance certifications should be considered when selecting a substitute?

A: The LM2592HVT-3.3 is RoHS non-compliant. Both LM2592HVT-3.3/NOPB and LM2575-3.3WT are ROHS3 compliant, making them suitable for applications with RoHS requirements. LM2576T-3.3G is also ROHS3 compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.