LM5575MHX Equivalent & Substitute Parts

Part Overview

The LM5575MHX is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. It delivers 1.5A output current with an adjustable output range from 1.225V to 70V, supporting input voltages from 6V to 75V. The device operates at switching frequencies between 50kHz and 500kHz and is housed in a 16-PowerTSSOP surface mount package.

The LM5575MHX carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM5575MHX

Texas InstrumentsIn Stock: 19481LM5575MHX Datasheet

Current PartRFQ

LM5575MHX/NOPB

Texas InstrumentsIn Stock: 35282LM5575MHX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM5575MHX is determined by strict equivalence across the following critical parameters:

• Functional topology: Buck (step-down) switching regulator
• Output configuration: Positive adjustable voltage
• Electrical specifications: Input voltage range (6V–75V), output voltage range (1.225V–70V), output current (1.5A), switching frequency (50kHz–500kHz)
• Package compatibility: 16-PowerTSSOP surface mount package with identical pinout and thermal characteristics
• Operating temperature range: -40°C to 125°C (TJ)
• Synchronous rectifier requirement: Non-synchronous design

The LM5575MHX/NOPB is a direct manufacturer equivalent that maintains all electrical and mechanical specifications while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LM5575MHX/NOPB is the direct substitute for the LM5575MHX. Both parts share identical electrical specifications, package geometry, and thermal performance. The primary distinction is product status and compliance certification.

The LM5575MHX carries obsolete status with RoHS non-compliant certification. The LM5575MHX/NOPB maintains active product status with ROHS3 compliance, making it the preferred selection for new designs and ongoing production requirements. The /NOPB suffix indicates lead-free plating and RoHS3 compliance, ensuring compatibility with current environmental and regulatory standards.

Both parts are functionally interchangeable at the circuit level. PCB layout, thermal management, and external component selection remain unchanged between the two variants.

Frequently Asked Questions (FAQ)

Q: Can the LM5575MHX/NOPB be used as a direct replacement for the LM5575MHX?

A: Yes. The LM5575MHX/NOPB is a direct manufacturer equivalent with identical electrical specifications, output current rating, input voltage range, adjustable output voltage range, switching frequency, package type, and operating temperature range. No circuit modifications are required.

Q: What is the difference between LM5575MHX and LM5575MHX/NOPB?

A: The primary differences are product status and compliance certification. The LM5575MHX is obsolete and RoHS non-compliant. The LM5575MHX/NOPB is active and ROHS3 compliant. The /NOPB designation indicates lead-free plating. All electrical and mechanical specifications are identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the 16-PowerTSSOP surface mount package with 0.173" width and 4.40mm body width. Pinout and thermal characteristics are identical, ensuring direct PCB compatibility.

Q: Why is the LM5575MHX marked as obsolete?

A: The LM5575MHX has reached end-of-life status. The LM5575MHX/NOPB represents the current active equivalent with modern compliance certifications and ongoing manufacturing support.

Q: What does the /NOPB suffix mean?

A: /NOPB indicates "No Plumbum" (lead-free) and signifies RoHS3 compliance. This designation confirms the part meets current environmental and regulatory requirements for lead-free manufacturing.

Q: Can I use these parts interchangeably in existing designs?

A: Yes. The LM5575MHX/NOPB is a direct functional and mechanical equivalent. Existing designs using the LM5575MHX require no modifications to accommodate the LM5575MHX/NOPB.