LM2575HVS-3.3 Equivalent & Substitute Parts

Part Overview

The LM2575HVS-3.3 is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series, delivering a fixed 3.3V output at 1A. This device operates across a 4V to 60V input range with a 52kHz switching frequency and is housed in a TO-263-6 (D2PAK) package. The main part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Function	Step-Down (Buck)
Output Voltage	3.3V Fixed
Output Current	1A
Input Voltage Range	4V to 60V
Switching Frequency	52kHz
Package	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature	-40°C to 125°C (TJ)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the LM2575HVS-3.3 is determined by the following critical parameters: fixed 3.3V output voltage, buck topology, 52kHz switching frequency, TO-263-6 package compatibility, and -40°C to 125°C operating temperature range. Parts are grouped into three categories:

Direct Equivalent (Same Specifications): LM2575HVS-3.3/NOPB maintains identical electrical and thermal characteristics with active product status and RoHS3 compliance.

Pin-Compatible Substitutes (1A Output Current): LM2575-3.3WU, LM2575-3.3WU-TR, and LM2575D2T-3.3R4G provide equivalent 1A output current and 3.3V fixed output in the same package footprint. Input voltage ranges vary slightly (4V–40V or 4.75V–40V), which remains compatible with typical applications designed for the original 4V–60V specification.

Higher Current Alternatives (3A Output Current): LM2576-3.3WU, LM2576-3.3WU-TR, and LM2576D2TR4-3.3G deliver 3A output current in the same package, suitable for designs requiring increased current capacity while maintaining 3.3V output and 52kHz switching frequency.

Enhanced Topology Options: MIC4575-3.3WU and MIC4575-3.3WU-TR offer buck-boost capability with 1.7A switch current and 200kHz switching frequency. MIC4576-3.3WU provides 3A output with 200kHz operation, both in compatible TO-263-6 packages.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Min–Max)	Switching Frequency	Package	Product Status	RoHS Status
LM2575HVS-3.3	Texas Instruments	1A	4V–60V	52kHz	TO-263-6	Obsolete	Non-compliant
LM2575HVS-3.3/NOPB	Texas Instruments	1A	4V–60V	52kHz	TO-263-6	Active	RoHS3 Compliant
LM2575-3.3WU	Microchip Technology	1A	4V–40V	52kHz	TO-263-6	Active	RoHS3 Compliant
LM2575-3.3WU-TR	Microchip Technology	1A	4V–40V	52kHz	TO-263-6	Active	RoHS3 Compliant
LM2575D2T-3.3R4G	onsemi	1A	4.75V–40V	52kHz	D2PAK-5	Active	RoHS3 Compliant
LM2576-3.3WU	Microchip Technology	3A	4V–40V	52kHz	TO-263-6	Active	RoHS3 Compliant
LM2576-3.3WU-TR	Microchip Technology	3A	4V–40V	52kHz	TO-263-6	Active	RoHS3 Compliant
LM2576D2TR4-3.3G	onsemi	3A	7V–40V	52kHz	D2PAK-5	Active	RoHS3 Compliant
MIC4575-3.3WU	Microchip Technology	1.7A (Switch)	4V–24V	200kHz	TO-263-6	Active	RoHS3 Compliant
MIC4575-3.3WU-TR	Microchip Technology	1.7A (Switch)	4V–24V	200kHz	TO-263-6	Active	RoHS3 Compliant
MIC4576-3.3WU	Microchip Technology	3A	4V–36V	200kHz	TO-263-6	Active	RoHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement: LM2575HVS-3.3/NOPB is the primary equivalent, offering identical electrical specifications with active product status and RoHS3 compliance. This part is recommended when design specifications require the original 4V–60V input range and 52kHz switching frequency without modification.

For 1A Applications with Reduced Input Range: LM2575-3.3WU and LM2575-3.3WU-TR are suitable when the application input voltage does not exceed 40V. Both are active products with RoHS3 compliance. The TR variant is packaged in Tape & Reel format for automated assembly.

For onsemi Sourcing: LM2575D2T-3.3R4G provides 1A output with a minimum input voltage of 4.75V and maximum of 40V. This part is active with RoHS3 compliance and MSL-1 moisture sensitivity rating.

For Higher Current Requirements: LM2576-3.3WU, LM2576-3.3WU-TR, and LM2576D2TR4-3.3G deliver 3A output current while maintaining 3.3V fixed output and 52kHz switching frequency. All are active products with RoHS3 compliance. The onsemi variant (LM2576D2TR4-3.3G) requires a minimum input voltage of 7V.

For Enhanced Switching Frequency: MIC4575-3.3WU and MIC4575-3.3WU-TR operate at 200kHz with buck-boost topology, suitable for applications requiring lower EMI or smaller passive component footprints. Input voltage is limited to 4V–24V. MIC4576-3.3WU provides 3A output at 200kHz with 4V–36V input range.

All substitute parts maintain the TO-263-6 package footprint, -40°C to 125°C operating temperature range, and surface mount mounting type. All listed substitutes are active products with RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can LM2575HVS-3.3/NOPB be used as a direct replacement for LM2575HVS-3.3?

A: Yes. LM2575HVS-3.3/NOPB is electrically and mechanically identical to the obsolete LM2575HVS-3.3, with the same 1A output current, 3.3V fixed output, 4V–60V input range, 52kHz switching frequency, and TO-263-6 package. The primary difference is product status (active vs. obsolete) and RoHS compliance (RoHS3 vs. non-compliant).

Q: What is the difference between LM2575-3.3WU and LM2575-3.3WU-TR?

A: Both parts are electrically identical with 1A output, 3.3V fixed output, 4V–40V input range, and 52kHz switching frequency. The difference is packaging: LM2575-3.3WU is supplied in Tube format, while LM2575-3.3WU-TR is supplied in Tape & Reel (TR) format for automated assembly processes.

Q: Can I use LM2576-3.3WU in place of LM2575HVS-3.3?

A: Yes, with design considerations. LM2576-3.3WU is pin-compatible in the TO-263-6 package and maintains the same 3.3V output and 52kHz switching frequency. However, it delivers 3A output current instead of 1A. The input voltage range is 4V–40V, which is narrower than the original 4V–60V. This substitution is suitable when the application input voltage does not exceed 40V and higher current capacity is acceptable or beneficial.

Q: What are the key differences between MIC4575-3.3WU and LM2575-3.3WU?

A: MIC4575-3.3WU offers buck-boost topology with 1.7A switch current and 200kHz switching frequency, compared to LM2575-3.3WU's buck-only topology with 1A output and 52kHz switching frequency. MIC4575-3.3WU input range is 4V–24V, narrower than LM2575-3.3WU's 4V–40V. Both share the same TO-263-6 package and 3.3V fixed output. MIC4575-3.3WU is suitable for applications requiring buck-boost capability or lower EMI from higher switching frequency.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant. The original LM2575HVS-3.3 is RoHS non-compliant, making RoHS3-compliant substitutes necessary for applications subject to RoHS regulations.

Q: What is the difference between D2PAK-5 and TO-263-6 packages?

A: D2PAK-5 and TO-263-6 are equivalent package designations for the same physical form factor: a 5-lead surface mount package with a thermal tab. Parts specified as D2PAK-5 (onsemi variants) and TO-263-6 (Microchip and Texas Instruments variants) are mechanically and electrically compatible and share the same PCB footprint.

Q: Can I use onsemi LM2575D2T-3.3R4G if my application requires 4V minimum input?

A: No. LM2575D2T-3.3R4G has a minimum input voltage of 4.75V, which exceeds the 4V minimum of the original LM2575HVS-3.3. For applications requiring 4V minimum input, use LM2575HVS-3.3/NOPB, LM2575-3.3WU, or LM2575-3.3WU-TR instead.

Q: Is MIC4576-3.3WU suitable for applications designed for LM2575HVS-3.3?

A: Yes, with input voltage considerations. MIC4576-3.3WU provides 3A output in the same TO-263-6 package with 3.3V fixed output and 52kHz switching frequency. The input range is 4V–36V, which is narrower than the original 4V–60V. This substitution is suitable when application input voltage does not exceed 36V and higher current capacity is acceptable.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message