LM2575MX-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LM2575MX-3.3/NOPB is a buck switching regulator IC manufactured by Texas Instruments, designed for step-down voltage conversion with a fixed 3.3V output at 1A maximum current. This device operates across a wide input voltage range of 4V to 40V and is housed in a 24-SOIC surface mount package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

LM2575MX-3.3/NOPB

Texas InstrumentsIn Stock: 1092LM2575MX-3.3/NOPB Datasheet

Current PartRFQ

LM2575-3.3YWM

Microchip TechnologyIn Stock: 955LM2575-3.3YWM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575MX-3.3/NOPB is determined by strict alignment of the following electrical and mechanical parameters:

• Fixed output voltage of 3.3V
• Output current rating of 1A
• Input voltage range of 4V to 40V minimum
• Switching frequency of 52kHz
• 24-SOIC package configuration (0.295", 7.50mm Width)
• Operating temperature range of -40°C to 125°C
• Surface mount mounting type

The LM2575-3.3YWM from Microchip Technology meets all substitution criteria. Both devices share the same base product number (LM2575) and are functionally equivalent buck regulators with identical electrical specifications and package geometry.

Parameter Comparison

Engineering Selection Recommendations

The LM2575-3.3YWM is a direct functional equivalent to the LM2575MX-3.3/NOPB. Selection between these parts should be based on the following factors:

The LM2575MX-3.3/NOPB is obsolete, whereas the LM2575-3.3YWM maintains active product status from Microchip Technology. For new designs or ongoing production requiring long-term component availability, the LM2575-3.3YWM is the appropriate choice.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial applications. The electrical specifications, package geometry, and thermal operating range are identical, ensuring direct pin-for-pin and functional compatibility.

The moisture sensitivity level differs between the two parts (MSL 1 for the original versus MSL 2 for the substitute), which may affect storage and handling procedures but does not impact electrical performance or circuit operation.

Frequently Asked Questions (FAQ)

Q: Can the LM2575-3.3YWM be used as a direct replacement for the LM2575MX-3.3/NOPB?

A: Yes. Both devices are functionally equivalent buck regulators with identical output voltage (3.3V), output current (1A), input voltage range (4V to 40V), switching frequency (52kHz), and 24-SOIC package configuration. Pin-for-pin compatibility is maintained.

Q: What is the primary reason to substitute the LM2575MX-3.3/NOPB?

A: The LM2575MX-3.3/NOPB is classified as obsolete. The LM2575-3.3YWM maintains active product status, ensuring long-term availability and supply chain continuity.

Q: Are there any differences in electrical performance between these parts?

A: No. Both devices operate at 52kHz switching frequency, accept input voltages from 4V to 40V, deliver 1A at 3.3V output, and operate across the temperature range of -40°C to 125°C.

Q: Do both parts require the same PCB layout and external component values?

A: Yes. The identical package type (24-SOIC), pin configuration, and electrical specifications ensure that existing PCB designs and external component selections remain valid without modification.

Q: What is the difference in moisture sensitivity level between these parts?

A: The LM2575MX-3.3/NOPB has MSL 1 (unlimited moisture exposure tolerance), while the LM2575-3.3YWM has MSL 2 (1-year moisture exposure tolerance). This affects storage conditions and handling procedures but does not impact circuit operation or electrical performance.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the LM2575MX-3.3/NOPB and LM2575-3.3YWM are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for industrial applications.