LM2574M-5.0 Equivalent & Substitute Parts

Part Overview

The LM2574M-5.0 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for positive fixed 5V output applications with 500mA current capability. This component operates across a 4V to 40V input range and features a 52kHz switching frequency in a 14-SOIC surface mount package. The part is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for ongoing design support and procurement planning.

Substiute Parts

LM2574M-5.0

Texas InstrumentsIn Stock: 3450LM2574M-5.0 Datasheet

Current PartRFQ

LM2574M-5.0/NOPB

Texas InstrumentsIn Stock: 5554LM2574M-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2574N-5G

onsemiIn Stock: 1948LM2574N-5G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2574M-5.0 is determined by the following critical parameters: fixed 5V output voltage, 500mA output current capability, input voltage range of 4V to 40V minimum, buck topology function, and operating temperature range of -40°C to 125°C. All substitute parts must maintain these core electrical specifications to ensure functional compatibility within existing circuit designs.

The LM2574M-5.0 has two identified substitute parts within the LM2574 base product family. Both alternatives meet the mandatory electrical requirements but differ in packaging configuration and mounting technology, which may impact board-level integration and procurement logistics.

Parameter Comparison

Engineering Selection Recommendations

LM2574M-5.0/NOPB is the direct Texas Instruments equivalent with identical electrical specifications and surface mount 14-SOIC packaging. This part is in Active product status with higher inventory availability (5450 pcs vs. 3419 pcs), making it the preferred substitute for designs currently using the LM2574M-5.0. The primary difference is packaging configuration (Tube vs. standard), which does not affect electrical performance.

LM2574N-5G from onsemi provides functional equivalence with the same 5V output, 500mA current, and 52kHz switching frequency. However, this part uses through-hole 8-DIP packaging instead of surface mount technology, requiring board redesign for PCB layout compatibility. The minimum input voltage is 4.75V compared to 4V for the Texas Instruments variants, which may impact applications requiring operation below 4.75V input. This part is suitable only when through-hole mounting is required or preferred for the application.

Frequently Asked Questions (FAQ)

Q: Can LM2574M-5.0/NOPB be used as a direct replacement for LM2574M-5.0?

A: Yes. Both parts share identical electrical specifications, output voltage, current rating, input voltage range, switching frequency, and operating temperature. The only difference is packaging configuration (Tube). No circuit modifications are required.

Q: What are the limitations of using LM2574N-5G as a substitute?

A: The LM2574N-5G requires through-hole mounting on the PCB, necessitating board redesign if the original design uses surface mount technology. Additionally, the minimum input voltage is 4.75V rather than 4V, which may not be suitable for applications requiring operation at lower input voltages. The 8-DIP package footprint is incompatible with the 14-SOIC footprint of the original part.

Q: Are all three parts RoHS compliant?

A: Yes. LM2574M-5.0, LM2574M-5.0/NOPB, and LM2574N-5G are all ROHS3 compliant and REACH unaffected.

Q: Why is the LM2574M-5.0 in Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments is discontinuing this specific part number variant. Customers should transition to LM2574M-5.0/NOPB or evaluate alternative solutions for long-term production requirements.

Q: Can the LM2574N-5G operate in buck-boost mode for this application?

A: The LM2574N-5G supports buck, boost, and buck-boost topologies. However, for this application requiring fixed 5V output from a 4V to 40V input, only the buck (step-down) function is utilized. The additional topology capabilities do not provide functional advantage in this configuration.