LM5025SD Equivalent & Substitute Parts

Part Overview

The LM5025SD is a forward converter regulator controller IC manufactured by Texas Instruments, designed for positive, isolation-capable output step-up/step-down DC-DC applications. This 16-WSON surface mount device integrates transistor driver functionality with comprehensive control features including dead time control, frequency control, and soft start capabilities.

The LM5025SD carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for systems utilizing this controller topology.

Substiute Parts

LM5025SD

Texas InstrumentsIn Stock: 3751LM5025SD Datasheet

Current PartRFQ

LM5025ASD/NOPB

Texas InstrumentsIn Stock: 2338LM5025ASD/NOPB Datasheet

Parametric EquivalentRFQ

LM5025ASDX/NOPB

Texas InstrumentsIn Stock: 5746LM5025ASDX/NOPB Datasheet

Parametric EquivalentRFQ

LM5025SD/NOPB

Texas InstrumentsIn Stock: 2249LM5025SD/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM5025SD is determined by strict parametric equivalence across all electrical and mechanical specifications. The following criteria establish valid substitution relationships:

Critical Substitution Parameters:

• Identical package and pinout: 16-WFDFN Exposed Pad (16-WSON 5x5)
• Matching supply voltage range: 8V ~ 15V
• Identical switching frequency range: 200kHz ~ 580kHz
• Matching duty cycle maximum: 80%
• Identical output configuration: Positive, Isolation Capable
• Matching topology: Forward Converter
• Identical control feature set: Dead Time Control, Frequency Control, Ramp, Soft Start
• Matching operating temperature range: -40°C ~ 125°C (TJ)
• Identical output type and number of outputs: Transistor Driver, 2 outputs, 1 phase

All three substitute parts (LM5025ASD/NOPB, LM5025ASDX/NOPB, and LM5025SD/NOPB) meet these criteria and are therefore parametrically equivalent to the main part LM5025SD.

Parameter Comparison

Engineering Selection Recommendations

LM5025ASDX/NOPB is the primary recommended substitute. This part maintains active product status with full ROHS3 compliance and the highest available inventory (5690 pcs). Selection of this part ensures long-term supply chain stability and regulatory compliance for new designs and production continuity.

LM5025SD/NOPB serves as a secondary substitute option. This part carries active product status and ROHS3 compliance with adequate inventory availability (2200 pcs). It is suitable for applications requiring immediate substitution with sustained supply assurance.

LM5025ASD/NOPB is available as a tertiary option with Last Time Buy status and ROHS3 compliance. While parametrically equivalent, this part's product status indicates limited future availability and should be considered only when primary and secondary options are unavailable.

The original LM5025SD carries obsolete status and RoHS non-compliant certification. Migration to any of the three substitute parts provides regulatory compliance improvement and extended product lifecycle support.

Frequently Asked Questions (FAQ)

Q: Are all three substitute parts pin-for-pin compatible with the LM5025SD?

A: Yes. All substitute parts utilize the identical 16-WFDFN Exposed Pad package (16-WSON 5x5) with matching pinout. Direct board-level substitution is supported without layout modifications.

Q: What is the difference between LM5025ASD/NOPB, LM5025ASDX/NOPB, and LM5025SD/NOPB?

A: All three parts are parametrically equivalent across electrical and mechanical specifications. The primary differences are product status and supply availability. LM5025ASDX/NOPB maintains active status with highest inventory. LM5025SD/NOPB is active with moderate inventory. LM5025ASD/NOPB carries Last Time Buy status with limited future availability.

Q: Why is the original LM5025SD marked as obsolete?

A: The LM5025SD has reached end-of-life status. Texas Instruments has transitioned this product line to the LM5025A variants, which provide improved compliance certifications and extended product support.

Q: Can I use these substitutes in new designs?

A: Yes. LM5025ASDX/NOPB and LM5025SD/NOPB are both active products suitable for new design implementations. Both carry ROHS3 compliance and support long-term production requirements.

Q: What packaging options are available for these parts?

A: All substitute parts are supplied in Tape & Reel (TR) packaging for surface mount assembly. The physical package remains 16-WFDFN Exposed Pad (16-WSON 5x5) across all variants.

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

A: No. All parts maintain identical electrical specifications including supply voltage range (8V ~ 15V), switching frequency range (200kHz ~ 580kHz), duty cycle maximum (80%), and control feature set.