LM5026SD Equivalent & Substitute Parts

Part Overview

The LM5026SD is a Forward Converter Regulator IC from Texas Instruments, designed for positive, isolation-capable output step-up/step-down DC-DC control applications. This 16-WSON surface mount device integrates transistor driver functionality with comprehensive control features including dead time control, frequency control, reset, and soft start capabilities.

The LM5026SD carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications utilizing this controller topology.

Substiute Parts

LM5026SD

Texas InstrumentsIn Stock: 1219LM5026SD Datasheet

Current PartRFQ

LM5026SD/NOPB

Texas InstrumentsIn Stock: 3373LM5026SD/NOPB Datasheet

Parametric EquivalentRFQ

LM5026SDX/NOPB

Texas InstrumentsIn Stock: 5673LM5026SDX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM5026SD are determined by strict parametric equivalence across all electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

• Output Type: Transistor Driver
• Function: Step-Up/Step-Down
• Output Configuration: Positive, Isolation Capable
• Topology: Forward Converter
• Number of Outputs: 2
• Output Phases: 1
• Voltage - Supply (Vcc/Vdd): 8V ~ 15V
• Frequency - Switching: 200kHz ~ 590kHz
• Duty Cycle (Max): 70%, 80%
• Control Features: Dead Time Control, Frequency Control, Reset, Soft Start
• Operating Temperature: -40°C ~ 125°C (TJ)
• Package / Case: 16-WFDFN Exposed Pad
• Supplier Device Package: 16-WSON (5x5)

All identified substitute parts maintain complete parametric compatibility with the LM5026SD across these critical specifications. Variations in product status, packaging format (bulk vs. tape & reel), and compliance certifications do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

LM5026SD/NOPB is classified as Last Time Buy status with ROHS3 compliance. This variant provides a transition path from the obsolete LM5026SD while maintaining full parametric equivalence. The tape & reel packaging format supports automated assembly processes. ROHS3 compliance aligns with current environmental and regulatory requirements for new designs and production runs.

LM5026SDX/NOPB carries Active product status with ROHS3 compliance, representing the current production variant. This part number is the recommended selection for new designs, ongoing production, and long-term supply chain continuity. Active status ensures sustained manufacturer support, availability, and technical documentation. ROHS3 compliance satisfies modern regulatory and procurement standards.

Selection between LM5026SD/NOPB and LM5026SDX/NOPB should be based on design timeline and supply chain strategy. For designs requiring immediate implementation with extended component lifecycle, LM5026SDX/NOPB is the preferred choice. Both variants maintain identical electrical and mechanical specifications, ensuring direct functional interchangeability in forward converter applications.

Frequently Asked Questions (FAQ)

Q: Are LM5026SD, LM5026SD/NOPB, and LM5026SDX/NOPB functionally interchangeable?

A: Yes. All three part numbers are parametrically equivalent across all electrical specifications, control features, and mechanical package dimensions. They are direct functional substitutes for forward converter regulator applications requiring positive, isolation-capable output control.

Q: What is the difference between LM5026SD and LM5026SD/NOPB?

A: The primary differences are product status and packaging format. LM5026SD is Obsolete with bulk packaging, while LM5026SD/NOPB is Last Time Buy status supplied in tape & reel format. Both are RoHS non-compliant and ROHS3 compliant respectively. Electrical and mechanical specifications are identical.

Q: Why should I select LM5026SDX/NOPB over the other variants?

A: LM5026SDX/NOPB carries Active product status, ensuring ongoing manufacturer support, sustained availability, and long-term supply chain reliability. It is ROHS3 compliant and represents the current production standard. For new designs and production continuity, this variant is the recommended choice.

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

A: Yes, provided the design accommodates the 16-WSON (5x5) package and operates within the specified voltage supply range of 8V ~ 15V and switching frequency range of 200kHz ~ 590kHz. All three variants maintain identical pin configuration, electrical characteristics, and control feature implementation.

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

A: The /NOPB suffix indicates lead-free (Pb-free) packaging and RoHS compliance. This designation reflects modern environmental and regulatory standards for component manufacturing and supply.

Q: Are there packaging considerations when substituting between these parts?

A: LM5026SD is supplied in bulk packaging, while LM5026SD/NOPB and LM5026SDX/NOPB are supplied in tape & reel format. The physical component dimensions and pin configuration remain identical. Tape & reel packaging is optimized for automated assembly processes, while bulk packaging may require manual handling or custom reeling.