LM25085ASDX/NOPB Equivalent & Substitute Parts

Part Overview

The LM25085ASDX/NOPB is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in an 8-WSON (3x3) package. This active product functions as a transistor driver for step-down topology applications with a single output phase. The device operates across a supply voltage range of 4.5V to 42V with switching frequency capability up to 1MHz and 100% maximum duty cycle. Finding equivalent substitute parts is necessary when the primary part number is unavailable due to inventory constraints or supply chain disruptions, while maintaining identical electrical and mechanical specifications.

Substiute Parts

LM25085ASDX/NOPB

Texas InstrumentsIn Stock: 1129LM25085ASDX/NOPB Datasheet

Current PartRFQ

LM25085ASD/NOPB

Texas InstrumentsIn Stock: 1375LM25085ASD/NOPB Datasheet

Parametric EquivalentRFQ

LM25085ASDE/NOPB

Texas InstrumentsIn Stock: 1006LM25085ASDE/NOPB Datasheet

Parametric EquivalentRFQ

LM25085SDE/NOPB

Texas InstrumentsIn Stock: 6583LM25085SDE/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM25085ASDX/NOPB are determined by strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following key parameters that must remain identical:

• Manufacturer: Texas Instruments
• Base Product Number: LM25085
• Function: Step-Down Buck Regulator Controller
• Output Type: Transistor Driver
• Topology: Buck with single output and single phase
• Voltage Supply Range: 4.5V ~ 42V
• Switching Frequency: Up to 1MHz
• Duty Cycle: 100% maximum
• Control Features: Current Limit and Frequency Control
• Operating Temperature Range: -40°C ~ 125°C (TJ)
• Package Type: 8-WFDFN Exposed Pad / 8-WSON (3x3)
• Compliance: ROHS3 Compliant, REACH Unaffected, MSL 1

All substitute parts listed maintain these specifications without deviation. Differences in part numbering suffixes (such as ASD, ASDE, SDE) reflect packaging or tape configuration variations that do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed—LM25085ASD/NOPB, LM25085ASDE/NOPB, and LM25085SDE/NOPB—are functionally equivalent to the LM25085ASDX/NOPB and maintain active product status with Texas Instruments. Each part carries identical ROHS3 compliance, REACH unaffected status, and MSL 1 rating, confirming suitability for equivalent circuit applications.

Selection among these substitutes should be based on inventory availability and packaging configuration requirements. The part number suffixes indicate variations in tape and reel configurations or manufacturing date codes that do not affect electrical performance or mechanical compatibility in the 8-WSON (3x3) package footprint.

Frequently Asked Questions (FAQ)

Q: Can LM25085ASD/NOPB be used as a direct replacement for LM25085ASDX/NOPB?

A: Yes. Both parts share identical electrical specifications, control features, operating temperature range, and 8-WSON (3x3) package configuration. The suffix variation reflects packaging or manufacturing differences that do not impact functional equivalence.

Q: What do the different suffixes (ASD, ASDE, SDE) represent?

A: The suffixes indicate variations in tape and reel packaging configurations or manufacturing batches. All variants maintain the same die, electrical performance, and package footprint. Selection depends on your procurement and assembly requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. LM25085ASD/NOPB, LM25085ASDE/NOPB, and LM25085SDE/NOPB are all ROHS3 compliant with REACH unaffected status and MSL 1 rating, matching the original part's compliance profile.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All substitute parts use the identical 8-WFDFN exposed pad package with 8-WSON (3x3) footprint, ensuring mechanical and electrical compatibility without PCB redesign.

Q: What is the operating temperature range for all these parts?

A: All parts operate across -40°C to 125°C junction temperature (TJ), supporting the same thermal performance envelope.

Q: Are there any functional differences between the substitute parts?

A: No. All parts provide identical step-down buck regulation, transistor driver output, current limit and frequency control features, and 1MHz maximum switching frequency with 100% duty cycle capability.