LM5575MH Equivalent & Substitute Parts

Part Overview

The LM5575MH is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. It functions as a step-down converter delivering positive adjustable output from 1.225V to 70V at 1.5A output current. The device operates across a wide input voltage range of 6V to 75V with a switching frequency between 50kHz and 500kHz.

The LM5575MH carries a Last Time Buy product status, indicating it has been discontinued. This necessitates identification of equivalent substitute parts to maintain design continuity and ensure component availability for ongoing production and support requirements.

Substiute Parts

LM5575MH

Texas InstrumentsIn Stock: 15419LM5575MH Datasheet

Current PartRFQ

LM5575Q0MH/NOPB

Texas InstrumentsIn Stock: 6302LM5575Q0MH/NOPB Datasheet

DirectRFQ

LM5575MH/NOPB

National SemiconductorIn Stock: 1203LM5575MH/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM5575MH are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution validity:

Critical Matching Parameters:

• Function: Step-Down (Buck) topology
• Output Configuration: Positive adjustable output
• Voltage Range: Input 6V–75V, Output 1.225V–70V
• Output Current: 1.5A
• Switching Frequency: 50kHz–500kHz
• Package: 16-PowerTSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount
• Synchronous Rectifier: No

All identified substitutes maintain these electrical and mechanical specifications, ensuring functional and physical compatibility within existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

LM5575Q0MH/NOPB is the primary substitute for the LM5575MH. This part maintains all electrical and mechanical specifications while offering an extended operating temperature range of -40°C to 150°C. The LM5575Q0MH/NOPB carries Active product status and includes AEC-Q100 automotive qualification, providing enhanced availability and long-term supply assurance. This part is suitable for applications requiring automotive-grade reliability or extended temperature operation.

LM5575MH/NOPB (National Semiconductor) is an alternative substitute maintaining identical electrical specifications and operating temperature range. This part carries Active product status and ROHS3 compliance. Selection between LM5575Q0MH/NOPB and LM5575MH/NOPB depends on supply chain availability and specific application requirements.

Both substitutes are physically and functionally compatible with the original LM5575MH design without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can LM5575Q0MH/NOPB directly replace LM5575MH in existing designs?

A: Yes. The LM5575Q0MH/NOPB maintains identical electrical specifications including input voltage range (6V–75V), output voltage range (1.225V–70V), output current (1.5A), and package format (16-PowerTSSOP). No circuit redesign is required.

Q: What is the difference between LM5575Q0MH/NOPB and LM5575MH/NOPB?

A: Both parts meet the core electrical specifications. LM5575Q0MH/NOPB offers an extended operating temperature range (-40°C to 150°C versus -40°C to 125°C) and includes AEC-Q100 automotive qualification. Selection depends on application temperature requirements and supply availability.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitutes use the 16-PowerTSSOP (0.173", 4.40mm Width) package with surface mount configuration, ensuring PCB layout compatibility.

Q: Why is the LM5575MH marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued this part number. Substitutes with Active status provide ongoing availability and supply continuity.

Q: Do the substitutes maintain RoHS3 compliance?

A: Yes. Both LM5575Q0MH/NOPB and LM5575MH/NOPB are ROHS3 compliant, matching the original part's environmental compliance requirements.