LM5026SDX Forward Converter Regulator Controller

Part Overview

The LM5026SDX is a forward converter regulator controller IC manufactured by Texas Instruments, designed for positive, isolation-capable output step-up/step-down DC-DC conversion applications. This component functions as a transistor driver with integrated dead time control, frequency control, reset, and soft start capabilities.

The LM5026SDX is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement. Active alternatives with identical electrical and mechanical specifications are available to ensure design continuity and system reliability.

Substiute Parts

LM5026SDX

Texas InstrumentsIn Stock: 892LM5026SDX Datasheet

Current PartRFQ

LM5026SDX/NOPB

Texas InstrumentsIn Stock: 5673LM5026SDX/NOPB Datasheet

DirectRFQ

LM5026SD/NOPB

Texas InstrumentsIn Stock: 3373LM5026SD/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM5026SDX are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following key parameters that must remain identical:

• Package / Case: 16-WFDFN Exposed Pad
• Supplier Device Package: 16-WSON (5x5)
• 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)
• Mounting Type: Surface Mount

Two substitute parts meet these criteria: LM5026SDX/NOPB (direct manufacturer equivalent, active status) and LM5026SD/NOPB (parametric equivalent, last time buy status).

Parameter Comparison

Engineering Selection Recommendations

For new designs and ongoing procurement, LM5026SDX/NOPB is the primary recommended substitute. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. The LM5026SDX/NOPB is ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the original LM5026SDX is RoHS non-compliant.

LM5026SD/NOPB serves as a secondary alternative with identical electrical and mechanical specifications. However, this part carries a Last Time Buy status, indicating limited future availability. Selection of LM5026SD/NOPB should be reserved for applications requiring immediate component procurement where LM5026SDX/NOPB supply is constrained.

Both substitute parts are supplied in Tape & Reel (TR) packaging, which differs from the original bulk packaging of the obsolete LM5026SDX. This packaging format is standard for production environments and does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can LM5026SDX/NOPB be used as a direct replacement for LM5026SDX?

A: Yes. LM5026SDX/NOPB is electrically and mechanically identical to LM5026SDX across all specified parameters. The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit modifications are required.

Q: What is the difference between LM5026SDX/NOPB and LM5026SD/NOPB?

A: Both parts are parametrically equivalent with identical electrical specifications and package configurations. The distinction lies in product lifecycle status: LM5026SDX/NOPB is active with ongoing production, while LM5026SD/NOPB is in Last Time Buy status with limited future availability.

Q: Does the Tape & Reel packaging affect circuit performance?

A: No. Tape & Reel packaging is a distribution format only and does not affect electrical performance, thermal characteristics, or mechanical compatibility. The component itself remains identical to bulk-packaged versions.

Q: Are there any temperature or voltage operating range differences between the substitute parts?

A: No. All three parts operate identically across the specified range of -40°C to 125°C junction temperature and 8V to 15V supply voltage.

Q: Which substitute part should be selected for new production designs?

A: LM5026SDX/NOPB is the recommended choice for new designs due to active product status and ROHS3 compliance, ensuring long-term supply availability and regulatory alignment.