LM2575HVS-15 Equivalent & Substitute Parts

Part Overview

The LM2575HVS-15 is a buck switching regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 15V output at 1A with an input voltage range of 4V to 60V and operates at a switching frequency of 52kHz. The device is packaged in TO-263-6 (D2PAK with 5 leads plus tab) and is currently in Last Time Buy status. Finding equivalent and substitute parts is necessary due to product lifecycle discontinuation and to ensure design flexibility for procurement and inventory management.

Substiute Parts

LM2575HVS-15

Texas InstrumentsIn Stock: 953LM2575HVS-15 Datasheet

Current PartRFQ

LM2575HVS-15/NOPB

National SemiconductorIn Stock: 994LM2575HVS-15/NOPB Datasheet

MFR RecommendedRFQ

LM2575D2T-15R4G

onsemiIn Stock: 12493LM2575D2T-15R4G Datasheet

MFR RecommendedRFQ

LM2576D2T-15G

onsemiIn Stock: 70793LM2576D2T-15G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2575HVS-15 are selected based on the following critical parameters that determine functional compatibility:

• Output Voltage (Fixed): 15V (exact match required)
• Package / Case: TO-263-6, D2PAK (5 Leads + Tab) (physical and electrical compatibility)
• Topology: Buck (step-down regulation)
• Output Configuration: Positive (voltage polarity)
• Switching Frequency: 52kHz (circuit timing compatibility)
• Operating Temperature Range: -40°C to 125°C (TJ)
• Mounting Type: Surface Mount

Substitutes are grouped into two categories:

Category 1 - Direct Equivalent (1A Output Current): Parts with identical output current rating (1A), maintaining the same power delivery capability.

Category 2 - Higher Current Capability (3A Output Current): Parts with increased output current rating (3A), providing enhanced power delivery while maintaining all other critical parameters. These are suitable for applications where additional current headroom is beneficial.

Parameter Comparison

Engineering Selection Recommendations

LM2575HVS-15/NOPB (National Semiconductor): This part is the manufacturer-recommended equivalent with Active product status. It maintains identical electrical specifications and package configuration. Selection is appropriate for applications requiring direct replacement with assured long-term availability.

LM2575D2T-15R4G (onsemi): This part is a direct functional equivalent with Active product status and ROHS3 compliance. It features improved moisture sensitivity rating (MSL 1 vs. MSL 3), indicating superior moisture resistance. Input voltage minimum is slightly higher (4.75V vs. 4V), and maximum input voltage is reduced to 40V. Selection is suitable for applications within the 4.75V to 40V input range where enhanced moisture protection is required.

LM2576D2T-15G (onsemi): This part provides increased output current capability (3A vs. 1A) while maintaining the same 15V fixed output voltage and 52kHz switching frequency. It has Active product status and ROHS3 compliance with MSL 1 rating. Input voltage range is 7V to 40V. Selection is appropriate for applications requiring higher current delivery or where design margin for current capacity is desired, provided the minimum input voltage requirement of 7V is met.

Frequently Asked Questions (FAQ)

Q: Can LM2575D2T-15R4G be used as a direct replacement for LM2575HVS-15?

A: Yes, within the input voltage range of 4.75V to 40V. The part is electrically equivalent with identical output voltage (15V), output current (1A), switching frequency (52kHz), and package configuration (TO-263-6, D2PAK). The minimum input voltage is 0.75V higher, and maximum input voltage is 20V lower than the original part.

Q: What is the advantage of using LM2576D2T-15G over LM2575HVS-15?

A: The LM2576D2T-15G provides triple the output current capability (3A vs. 1A) while maintaining the same 15V output voltage and switching frequency. This allows for higher power delivery and increased design margin. The trade-off is a higher minimum input voltage requirement (7V vs. 4V) and a lower maximum input voltage (40V vs. 60V).

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use the TO-263-6 D2PAK (5 Leads + Tab) package, ensuring physical and electrical compatibility with the original LM2575HVS-15 footprint.

Q: What does MSL rating mean, and why does it differ between parts?

A: MSL (Moisture Sensitivity Level) indicates the component's sensitivity to moisture during storage and handling. MSL 1 (Unlimited) means the part can be stored indefinitely without moisture precautions. MSL 3 (168 Hours) means the part must be used within 168 hours of opening the moisture barrier bag. LM2575D2T-15R4G and LM2576D2T-15G have superior MSL ratings, reducing handling risk in humid environments.

Q: Can I use LM2576D2T-15G in an application designed for 1A output current?

A: Yes. The LM2576D2T-15G is rated for 3A output current, so it can safely deliver 1A. The higher current rating provides additional design margin and does not negatively affect performance at lower current levels.

Q: What are the input voltage constraints when selecting a substitute?

A: The original LM2575HVS-15 accepts 4V to 60V input. LM2575HVS-15/NOPB maintains this range. LM2575D2T-15R4G operates from 4.75V to 40V. LM2576D2T-15G operates from 7V to 40V. Verify your application's input voltage falls within the selected part's specified range.