LM5576MHX Equivalent & Substitute Parts

Part Overview

The LM5576MHX is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. It delivers 3A output current across an input voltage range of 6V to 75V, with adjustable output from 1.225V to 70V. The device operates at switching frequencies between 50kHz and 500kHz and is housed in a 20-PowerTSSOP surface mount package.

The LM5576MHX 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

LM5576MHX

Texas InstrumentsIn Stock: 20522LM5576MHX Datasheet

Current PartRFQ

LM5576MHX/NOPB

Texas InstrumentsIn Stock: 40378LM5576MHX/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5576MHX is determined by strict equivalence across the following electrical and mechanical parameters:

• Input voltage range: 6V minimum to 75V maximum
• Output voltage adjustability: 1.225V to 70V
• Output current capability: 3A
• Switching frequency range: 50kHz to 500kHz
• Operating temperature range: -40°C to 125°C
• Package type: 20-PowerTSSOP surface mount
• Topology: Buck (step-down) with positive adjustable output
• Number of outputs: Single output configuration

The LM5576MHX/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and compliance certification, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The LM5576MHX/NOPB is the direct substitute for the obsolete LM5576MHX. Both devices share identical electrical specifications, output characteristics, and package configuration. The LM5576MHX/NOPB carries active product status with current manufacturing support and holds ROHS3 compliance certification, whereas the original LM5576MHX is obsolete and RoHS non-compliant.

For new designs or production continuity, the LM5576MHX/NOPB is the appropriate selection. The device maintains full functional and electrical equivalence while providing access to active supply channels and current regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the LM5576MHX/NOPB be used as a direct replacement for the LM5576MHX?

A: Yes. The LM5576MHX/NOPB is electrically and mechanically identical to the LM5576MHX. Both devices deliver 3A output current, support input voltages from 6V to 75V, and feature adjustable output from 1.225V to 70V in the same 20-PowerTSSOP package. The primary difference is product status and compliance certification.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB designation indicates the component is supplied in Cut Tape (CT) and Digi-Reel® packaging formats without lead (Pb-free), reflecting RoHS3 compliance. This packaging designation does not affect electrical performance or functional compatibility.

Q: Are there any compliance differences between the two parts?

A: Yes. The LM5576MHX/NOPB is ROHS3 compliant, while the original LM5576MHX is RoHS non-compliant. Both maintain REACH Unaffected status and EAR99 export classification. For applications subject to RoHS requirements, the LM5576MHX/NOPB is the required selection.

Q: Is the package footprint identical between these parts?

A: Yes. Both the LM5576MHX and LM5576MHX/NOPB use the 20-PowerTSSOP package with 0.173" width and 4.40mm body width. PCB layouts and footprints are fully compatible.

Q: Why is the original LM5576MHX marked as obsolete?

A: The LM5576MHX has reached end-of-life status. Texas Instruments has transitioned production to the LM5576MHX/NOPB variant, which incorporates current compliance standards and maintains active manufacturing support.