LM2575-5.0WT Equivalent & Substitute Parts

Part Overview

The LM2575-5.0WT is a buck switching regulator IC manufactured by Microchip Technology, designed for step-down voltage conversion applications. It delivers a fixed 5V output at 1A from input voltages ranging from 4V to 40V, operating at a switching frequency of 52kHz. The device is housed in a TO-220-5 through-hole package and maintains an active product status with full RoHS3 compliance. Alternative models become necessary when higher output current capacity, improved switching frequency performance, or specific supply chain availability requirements must be met while maintaining the same output voltage and package form factor.

Substiute Parts

LM2575-5.0WT

Microchip TechnologyIn Stock: 4528LM2575-5.0WT Datasheet

Current PartRFQ

LM2596T-5.0/NOPB

National SemiconductorIn Stock: 20316LM2596T-5.0/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575-5.0WT is determined by the following critical parameters:

• Fixed output voltage of 5V
• Positive output configuration
• Buck topology (step-down conversion)
• TO-220-5 package form factor
• Through-hole mounting compatibility
• Input voltage range compatibility (minimum 4V, maximum 40V)
• Operating temperature range of -40°C to 125°C

The LM2596T-5.0/NOPB qualifies as a direct substitute based on these criteria. While it offers enhanced specifications in output current capacity (3A versus 1A) and switching frequency (150kHz versus 52kHz), it maintains identical output voltage, package configuration, and input voltage range parameters. These performance improvements do not compromise compatibility in applications designed for the LM2575-5.0WT.

Parameter Comparison

Engineering Selection Recommendations

Both the LM2575-5.0WT and LM2596T-5.0/NOPB maintain active product status and meet applicable compliance standards (RoHS3 and REACH requirements). Selection between these devices should be based on application-specific current requirements and thermal management considerations. The LM2575-5.0WT is suitable for applications requiring 1A output current, while the LM2596T-5.0/NOPB accommodates applications demanding up to 3A. The higher switching frequency of the LM2596T-5.0/NOPB (150kHz versus 52kHz) permits use of smaller external filter components, which may influence board space and cost considerations. Both devices operate across the full -40°C to 125°C temperature range and accept input voltages from their respective minimum thresholds to 40V maximum.

Frequently Asked Questions (FAQ)

Q: Can the LM2596T-5.0/NOPB directly replace the LM2575-5.0WT in existing designs?

A: Yes, the LM2596T-5.0/NOPB is a direct substitute. Both devices share identical output voltage (5V), package form factor (TO-220-5), and operating temperature range. The LM2596T-5.0/NOPB provides higher current capacity (3A versus 1A) and faster switching frequency (150kHz versus 52kHz), making it suitable for applications originally designed for the LM2575-5.0WT.

Q: What is the minimum input voltage difference between these devices?

A: The LM2575-5.0WT accepts input voltages starting at 4V, while the LM2596T-5.0/NOPB requires a minimum of 4.5V. Applications operating below 4.5V input voltage must use the LM2575-5.0WT.

Q: Are there package differences between these regulators?

A: Both devices use TO-220-5 packages suitable for through-hole mounting. The LM2596T-5.0/NOPB specifies formed leads, which may affect PCB layout and component insertion procedures. Verify mechanical compatibility with your specific PCB design and assembly equipment.

Q: How does switching frequency affect component selection?

A: The LM2596T-5.0/NOPB operates at 150kHz compared to the LM2575-5.0WT at 52kHz. Higher switching frequency permits smaller external filter inductors and capacitors, potentially reducing board area and cost. However, external component values must be recalculated for the substitute device to maintain proper circuit performance.

Q: Are both devices RoHS compliant?

A: The LM2575-5.0WT is explicitly RoHS3 compliant. Compliance information for the LM2596T-5.0/NOPB should be verified with the manufacturer or distributor for your specific application requirements.