LM5000SD-3 Equivalent & Substitute Parts

Part Overview

The LM5000SD-3 is a boost, flyback, and forward converter switching regulator IC from Texas Instruments, designed for multi-configuration adjustable power management applications. It delivers positive adjustable output from 3.1V to 80V with a maximum switch current of 1.35A, operating across an input voltage range of 3.1V to 40V. The device is housed in a 16-WFDFN exposed pad surface mount package.

The LM5000SD-3 is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this regulator topology.

Substiute Parts

LM5000SD-3

Texas InstrumentsIn Stock: 2289LM5000SD-3 Datasheet

Current PartRFQ

LM5000SD-3/NOPB

Texas InstrumentsIn Stock: 6061LM5000SD-3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5000SD-3 is determined by strict equivalence across the following critical parameters:

• Topology: Boost, Flyback, Forward Converter
• Output Configuration: Positive
• Output Type: Adjustable
• Number of Outputs: 1
• Voltage - Input Range: 3.1V to 40V
• Voltage - Output Range: 3.1V to 80V (Switch)
• Current - Output: 1.35A (Switch)
• Frequency - Switching: 300kHz, 700kHz
• Operating Temperature: -40°C ~ 125°C (TJ)
• Package / Case: 16-WFDFN Exposed Pad
• Supplier Device Package: 16-WSON (5x5)

The LM5000SD-3/NOPB qualifies as a direct substitute, maintaining identical electrical specifications and mechanical compatibility while offering improved product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The LM5000SD-3/NOPB is the direct equivalent substitute for the obsolete LM5000SD-3. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility in existing designs.

The LM5000SD-3/NOPB offers significant advantages for new procurement:

• Active product status ensures long-term availability and manufacturer support
• ROHS3 compliance meets current environmental and regulatory requirements, whereas the original LM5000SD-3 is RoHS non-compliant
• Enhanced packaging options (Cut Tape and Digi-Reel) improve supply chain flexibility and handling efficiency
• Substantially higher inventory availability (6000 units versus 2200 units) supports production continuity

For applications currently using the LM5000SD-3, transition to the LM5000SD-3/NOPB requires no circuit modifications, design changes, or re-qualification. The substitute part maintains full electrical and thermal performance across the specified operating range.

Frequently Asked Questions (FAQ)

Q: Can the LM5000SD-3/NOPB be used as a direct replacement for the LM5000SD-3 in existing designs?

A: Yes. The LM5000SD-3/NOPB is electrically and mechanically identical to the LM5000SD-3. All electrical parameters, switching frequencies, output voltage ranges, current ratings, and thermal specifications are equivalent. The 16-WFDFN exposed pad package and pinout are identical, enabling direct substitution without circuit modifications.

Q: What is the difference between the LM5000SD-3 and LM5000SD-3/NOPB?

A: The primary differences are product status, regulatory compliance, and packaging options. The LM5000SD-3 is obsolete and RoHS non-compliant, while the LM5000SD-3/NOPB is active and ROHS3 compliant. The substitute part is available in Cut Tape and Digi-Reel packaging formats, providing improved supply chain options.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts operate across the identical input voltage range (3.1V to 40V), deliver the same adjustable output voltage range (3.1V to 80V), and provide 1.35A switch current. Operating temperature range, switching frequency options (300kHz and 700kHz), and all other electrical characteristics are identical.

Q: Why is the LM5000SD-3 marked as obsolete?

A: The LM5000SD-3 has been superseded by the LM5000SD-3/NOPB, which offers improved regulatory compliance and active manufacturer support. Texas Instruments recommends transitioning to the active equivalent for new designs and ongoing production.

Q: Does the package size or pinout differ between these parts?

A: No. Both parts use the 16-WFDFN exposed pad package in a 5x5mm form factor. Pinout, pad layout, and mechanical dimensions are identical, ensuring seamless PCB compatibility.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix indicates that the part is supplied without plumbum (lead-free). This designation reflects RoHS3 compliance and the absence of lead in the component's construction and solder joints.