LM2575-5.0BT Equivalent & Substitute Parts

Part Overview

The LM2575-5.0BT is a buck switching regulator IC from Microchip Technology designed for step-down voltage conversion with a fixed 5V output and 1A current capacity. This device operates across a wide input voltage range of 4V to 40V and features a 52kHz switching frequency in a TO-220-5 through-hole package. The part is currently listed as obsolete, making identification of suitable alternatives essential for ongoing design support and production continuity.

Substiute Parts

LM2575-5.0BT

Microchip TechnologyIn Stock: 5460LM2575-5.0BT Datasheet

Current PartRFQ

LM2575-5.0WT

Microchip TechnologyIn Stock: 4528LM2575-5.0WT Datasheet

DirectRFQ

LM2596T-5.0/NOPB

National SemiconductorIn Stock: 20316LM2596T-5.0/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2575-5.0BT is determined by the following critical parameters: fixed 5V output voltage, TO-220-5 package compatibility, through-hole mounting, buck topology, and operating temperature range of -40°C to 125°C. Parts meeting these core electrical and mechanical specifications are considered functionally equivalent.

The LM2575-5.0WT serves as a direct pin-compatible substitute, maintaining identical electrical characteristics while offering active product status. The LM2596T-5.0/NOPB represents an enhanced alternative with increased current capacity (3A versus 1A) and higher switching frequency (150kHz versus 52kHz), suitable for applications requiring greater power delivery within the same voltage and package constraints.

Parameter Comparison

Engineering Selection Recommendations

For designs currently using the LM2575-5.0BT, the LM2575-5.0WT is the primary substitute. This part maintains identical electrical specifications and package configuration while offering active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

The LM2596T-5.0/NOPB is suitable as an alternative when design requirements permit increased output current capacity (3A) and higher switching frequency (150kHz). This part also maintains active status and the same TO-220-5 package footprint. The minimum input voltage specification differs slightly (4.5V versus 4V), which must be verified against specific application requirements.

Selection between these substitutes should be based on current requirements, compliance mandates, and minimum input voltage constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can the LM2575-5.0WT be used as a direct replacement for the LM2575-5.0BT?

A: Yes. The LM2575-5.0WT is pin-compatible and electrically equivalent, with identical output voltage (5V), output current (1A), input voltage range (4V to 40V), switching frequency (52kHz), and operating temperature range (-40°C to 125°C). The primary difference is product status (active versus obsolete) and RoHS compliance.

Q: What are the differences between the LM2575-5.0WT and LM2596T-5.0/NOPB?

A: Both parts share the same 5V fixed output voltage, TO-220-5 package, and operating temperature range. The LM2596T-5.0/NOPB provides higher output current (3A versus 1A) and higher switching frequency (150kHz versus 52kHz). The minimum input voltage for the LM2596T-5.0/NOPB is 4.5V compared to 4V for the LM2575-5.0WT.

Q: Are there package compatibility concerns when substituting these parts?

A: All three parts use the TO-220-5 package with through-hole mounting. The LM2596T-5.0/NOPB specifies formed leads, which may require verification against PCB pad specifications, though standard TO-220-5 footprints typically accommodate both straight and formed lead variants.

Q: Which substitute should be selected for new designs?

A: For new designs requiring 1A output current, the LM2575-5.0WT is recommended due to active product status and ROHS3 compliance. For applications requiring higher current capacity, the LM2596T-5.0/NOPB is appropriate, provided the minimum input voltage of 4.5V meets application requirements.

Q: What compliance differences exist between these parts?

A: The LM2575-5.0BT is RoHS non-compliant. The LM2575-5.0WT is ROHS3 compliant. RoHS status for the LM2596T-5.0/NOPB is not specified in the provided data. All three parts are REACH unaffected and classified as EAR99 for export control purposes.