LM2575HVSX-3.3 Equivalent & Substitute Parts

Part Overview

The LM2575HVSX-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 1A from input voltages ranging from 4V to 60V, operating at a switching frequency of 52kHz. The device is housed in a TO-263-6 (D2PAK) surface mount package with 5 leads plus tab.

This part is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

LM2575HVSX-3.3

Texas InstrumentsIn Stock: 2305LM2575HVSX-3.3 Datasheet

Current PartRFQ

LM2575HVSX-3.3/NOPB

Texas InstrumentsIn Stock: 6181LM2575HVSX-3.3/NOPB Datasheet

DirectRFQ

LM2575-3.3WU

Microchip TechnologyIn Stock: 25332LM2575-3.3WU Datasheet

MFR RecommendedRFQ

LM2575-3.3WU-TR

Microchip TechnologyIn Stock: 1820LM2575-3.3WU-TR Datasheet

MFR RecommendedRFQ

LM2575D2T-3.3R4G

onsemiIn Stock: 4705LM2575D2T-3.3R4G Datasheet

MFR RecommendedRFQ

LM2576D2TR4-3.3G

onsemiIn Stock: 2742LM2576D2TR4-3.3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575HVSX-3.3 is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 1A or greater
• Buck topology with step-down function
• Compatible package: TO-263-6 or D2PAK-5
• Operating temperature range: -40°C to 125°C
• Input voltage range compatibility (minimum 4V, maximum 40V or higher)
• Switching frequency of 52kHz

Substitute parts must maintain electrical equivalence across these parameters. Parts are grouped by manufacturer and product status to reflect availability and compliance posture.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): LM2575HVSX-3.3/NOPB from Texas Instruments is the direct equivalent with identical electrical specifications and package. It maintains active product status and ROHS3 compliance, making it the preferred choice for new designs and direct substitution in existing applications.

Microchip Technology Alternatives: LM2575-3.3WU and LM2575-3.3WU-TR are functionally equivalent with identical output voltage, current, and switching frequency. The maximum input voltage is limited to 40V compared to the original 60V specification. These parts are available in higher quantities and carry ROHS3 compliance. Selection between tube (LM2575-3.3WU) and tape & reel (LM2575-3.3WU-TR) packaging depends on procurement and assembly requirements.

onsemi Alternatives: LM2575D2T-3.3R4G provides electrical equivalence with a minimum input voltage of 4.75V and maximum of 40V. The LM2576D2TR4-3.3G offers increased output current capability (3A) but requires a minimum input voltage of 7V and is suitable only for applications where higher current capacity is beneficial and input voltage constraints are acceptable.

All active substitutes carry ROHS3 compliance and REACH unaffected status, supporting modern supply chain and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can LM2575-3.3WU replace LM2575HVSX-3.3 in all applications? A: LM2575-3.3WU is electrically equivalent for output voltage, current, and switching frequency. The primary difference is maximum input voltage: 40V versus 60V. Substitution is valid only if your application input voltage does not exceed 40V.

Q: What is the difference between LM2575-3.3WU and LM2575-3.3WU-TR? A: Both parts are electrically identical. LM2575-3.3WU is supplied in tube packaging, while LM2575-3.3WU-TR is supplied in tape & reel format. Selection depends on assembly process requirements and procurement volume.

Q: Why does LM2576D2TR4-3.3G have higher output current (3A) than the original (1A)? A: LM2576D2TR4-3.3G is from the LM2576 series, which is a higher-current variant of the LM2575 family. While it maintains the same 3.3V output and 52kHz switching frequency, it requires a minimum input voltage of 7V and is suitable only for applications where higher current capacity is needed and input voltage constraints are acceptable.

Q: Are all substitute parts RoHS compliant? A: All active substitute parts listed carry ROHS3 compliance. The original LM2575HVSX-3.3 is RoHS non-compliant. For applications requiring RoHS compliance, use LM2575HVSX-3.3/NOPB or Microchip/onsemi alternatives.

Q: What is the minimum input voltage requirement for each part? A: LM2575HVSX-3.3 and LM2575HVSX-3.3/NOPB: 4V. LM2575-3.3WU and LM2575-3.3WU-TR: 4V. LM2575D2T-3.3R4G: 4.75V. LM2576D2TR4-3.3G: 7V. Verify your application input voltage against these minimums before selection.

Q: Can I use LM2575D2T-3.3R4G as a direct pin-for-pin replacement? A: Yes. LM2575D2T-3.3R4G uses the same D2PAK-5 package footprint as the original TO-263-6 package. Electrical specifications are equivalent within the stated input voltage range (4.75V to 40V).