LM25085ASD/NOPB Equivalent & Substitute Parts

Part Overview

The LM25085ASD/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 voltage conversion applications with a single output phase. The device operates across a wide supply voltage range of 4.5V to 42V with switching frequencies up to 1MHz and supports current limit and frequency control features.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product family, enabling direct replacement in applications where component availability or inventory requirements necessitate alternative part selections.

Key Parameters

Parameter	Specification
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Step-Down Buck Regulator Controller
Output Type	Transistor Driver
Output Configuration	Positive
Number of Outputs	1
Output Phases	1
Voltage - Supply (Vcc/Vdd)	4.5V ~ 42V
Frequency - Switching	Up to 1MHz
Duty Cycle (Max)	100%
Control Features	Current Limit, Frequency Control
Operating Temperature	-40°C ~ 125°C (TJ)
Package / Case	8-WFDFN Exposed Pad
Supplier Device Package	8-WSON (3x3)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the LM25085ASD/NOPB are identified based on strict equivalence across the following critical parameters:

Electrical Parameters: Supply voltage range (4.5V ~ 42V), switching frequency capability (up to 1MHz), duty cycle maximum (100%), output configuration (positive), topology (buck), number of outputs (1), output phases (1), and control features (current limit, frequency control).

Mechanical Parameters: Package type (8-WFDFN Exposed Pad), supplier device package (8-WSON 3x3), and mounting type (surface mount).

Compliance Parameters: RoHS3 compliance, REACH unaffected status, and MSL rating (1 - Unlimited).

All substitute parts maintain identical electrical performance characteristics, physical form factor, and regulatory compliance status, enabling direct functional replacement in applications designed for the LM25085ASD/NOPB.

Parameter Comparison

Parameter	LM25085ASD/NOPB	LM25085ASDE/NOPB	LM25085SDE/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Category	Power Management (PMIC)	Power Management (PMIC)	Power Management (PMIC)
Function	Step-Down Buck Regulator Controller	Step-Down Buck Regulator Controller	Step-Down Buck Regulator Controller
Output Type	Transistor Driver	Transistor Driver	Transistor Driver
Output Configuration	Positive	Positive	Positive
Number of Outputs	1	1	1
Output Phases	1	1	1
Voltage - Supply (Vcc/Vdd)	4.5V ~ 42V	4.5V ~ 42V	4.5V ~ 42V
Frequency - Switching	Up to 1MHz	Up to 1MHz	Up to 1MHz
Duty Cycle (Max)	100%	100%	100%
Control Features	Current Limit, Frequency Control	Current Limit, Frequency Control	Current Limit, Frequency Control
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Package / Case	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad
Supplier Device Package	8-WSON (3x3)	8-WSON (3x3)	8-WSON (3x3)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—LM25085ASD/NOPB, LM25085ASDE/NOPB, and LM25085SDE/NOPB—are active products from Texas Instruments with identical electrical specifications, mechanical packaging, and regulatory compliance certifications. Selection between these parts is determined by inventory availability and supply chain requirements rather than technical performance differences.

The LM25085SDE/NOPB currently maintains the highest inventory level at 6,557 pieces, followed by LM25085ASD/NOPB at 1,285 pieces, and LM25085ASDE/NOPB at 946 pieces. All parts are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity), confirming suitability for standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can LM25085ASDE/NOPB and LM25085SDE/NOPB be used interchangeably with LM25085ASD/NOPB?

A: Yes. All three parts maintain identical electrical parameters, package specifications, and compliance certifications. Direct substitution is supported without circuit modification.

Q: What is the difference between these part numbers?

A: The part numbers reflect different manufacturing date codes and packaging configurations within the same product family. The electrical and mechanical specifications remain identical across all variants.

Q: Are there any temperature or operating condition limitations that differ between these parts?

A: No. All three parts operate across the identical temperature range of -40°C to 125°C (TJ) and support the same supply voltage range of 4.5V to 42V.

Q: Do these parts require different PCB layouts or design considerations?

A: No. All parts use the 8-WSON (3x3) package with 8-WFDFN exposed pad configuration. PCB layouts and design files are directly compatible.

Q: Are all parts RoHS and REACH compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the MSL rating for these parts?

A: All parts carry MSL rating 1 (unlimited), indicating no moisture sensitivity restrictions for storage and handling.

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