LM25085ASDE/NOPB Equivalent & Substitute Parts

Part Overview

The LM25085ASDE/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 is ROHS3 compliant and carries an MSL rating of 1 (Unlimited), indicating broad environmental compatibility for industrial and commercial applications.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the LM25085 product family, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Step-Down Buck Regulator Controller
Output Type	Transistor Driver
Topology	Buck
Number of Outputs	1
Output Phases	1
Voltage Supply Range (Vcc/Vdd)	4.5V ~ 42V
Switching Frequency	Up to 1MHz
Duty Cycle (Max)	100%
Control Features	Current Limit, Frequency Control
Operating Temperature Range	-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 LM25085ASDE/NOPB are identified within the LM25085 product family based on strict parameter equivalence. All substitute candidates maintain identical electrical specifications across the following critical parameters:

Voltage supply range: 4.5V ~ 42V
Switching frequency capability: Up to 1MHz
Duty cycle maximum: 100%
Control features: Current Limit, Frequency Control
Package type: 8-WFDFN Exposed Pad (8-WSON 3x3)
Operating temperature range: -40°C ~ 125°C
Regulatory compliance: ROHS3, REACH Unaffected
Moisture sensitivity: MSL 1 (Unlimited)

Substitution within this group is based on functional equivalence at the controller level. Variations in part numbering (ASDE vs. ASD vs. SDE designations) reflect manufacturing or packaging date codes and do not alter electrical performance or pin compatibility.

Parameter Comparison

Parameter	LM25085ASDE/NOPB	LM25085ASD/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
Topology	Buck	Buck	Buck
Number of Outputs	1	1	1
Output Phases	1	1	1
Voltage Supply Range (Vcc/Vdd)	4.5V ~ 42V	4.5V ~ 42V	4.5V ~ 42V
Switching Frequency	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 Range	-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
Inventory (Pcs)	946	1285	6557

Engineering Selection Recommendations

All three parts—LM25085ASDE/NOPB, LM25085ASD/NOPB, and LM25085SDE/NOPB—are active products from Texas Instruments with identical electrical and mechanical specifications. Each part carries ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for industrial and commercial power management applications.

Selection among these equivalents should be based on availability and supply chain requirements. The LM25085SDE/NOPB variant currently maintains the highest inventory level at 6557 pieces, followed by LM25085ASD/NOPB at 1285 pieces, and LM25085ASDE/NOPB at 946 pieces. All variants are suitable for direct substitution in existing circuit designs without modification to PCB layout, schematic, or external component values.

Frequently Asked Questions (FAQ)

Q: Can LM25085ASD/NOPB replace LM25085ASDE/NOPB in production designs?

A: Yes. Both parts are functionally equivalent with identical electrical specifications, pin configuration, and package dimensions (8-WSON 3x3). No circuit modifications are required.

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

A: The suffixes represent manufacturing date codes or packaging lot designations within the LM25085 product family. They do not reflect differences in electrical performance, functionality, or pin compatibility.

Q: Are all three parts ROHS3 compliant?

A: Yes. LM25085ASDE/NOPB, LM25085ASD/NOPB, and LM25085SDE/NOPB are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings.

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

A: Yes. All three variants share identical package specifications (8-WFDFN Exposed Pad, 8-WSON 3x3) and pin assignments, enabling direct PCB-level substitution.

Q: What is the operating temperature range for all variants?

A: All three parts operate across -40°C to 125°C junction temperature, suitable for industrial and automotive-grade applications.

Q: Are there any differences in control features between the variants?

A: No. All variants provide identical control features: Current Limit and Frequency Control, with switching frequency capability up to 1MHz and 100% maximum duty cycle.

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