LM3000ASQ/NOPB Equivalent & Substitute Parts

Part Overview

The LM3000ASQ/NOPB is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in a 32-WQFN (5x5) package with exposed pad. This device functions as a transistor driver for step-down topology applications with dual output phases and integrated synchronous rectification. The LM3000ASQ/NOPB is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support, production continuity, and system maintenance.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Step-Down DC-DC Controller
Output Type	Transistor Driver
Topology	Buck
Number of Outputs	2
Output Phases	2
Voltage Supply Range (Vcc/Vdd)	3.3V ~ 5.5V
Switching Frequency Range	200kHz ~ 1.5MHz
Maximum Duty Cycle	85%
Synchronous Rectifier	Yes
Clock Sync	Yes
Control Features	Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
Operating Temperature Range	-40°C ~ 125°C (TJ)
Package / Case	32-WQFN Exposed Pad (5x5)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM3000ASQ/NOPB is determined by strict equivalence across the following critical parameters:

Identical buck regulator topology with step-down DC-DC controller function
Dual output phases with 2-output configuration
Transistor driver output type
Supply voltage range: 3.3V ~ 5.5V
Switching frequency capability: 200kHz ~ 1.5MHz
Maximum duty cycle: 85%
Integrated synchronous rectification and clock synchronization
Control feature set: Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
Operating temperature range: -40°C ~ 125°C (TJ)
Package specification: 32-WQFN with exposed pad (5x5mm)
Surface mount configuration
Compliance certifications: ROHS3, MSL Level 1

The LM3000SQ/NOPB meets all these criteria and qualifies as a parametric equivalent substitute.

Parameter Comparison

Parameter	LM3000ASQ/NOPB (Main Part)	LM3000SQ/NOPB (Substitute)
Manufacturer	Texas Instruments	Texas Instruments
Category	Power Management (PMIC)	Power Management (PMIC)
Description	IC REG CTRLR BUCK 32WQFN	IC REG CTRLR BUCK 32WQFN
Function	Step-Down	Step-Down
Output Type	Transistor Driver	Transistor Driver
Topology	Buck	Buck
Number of Outputs	2	2
Output Phases	2	2
Voltage Supply (Vcc/Vdd)	3.3V ~ 5.5V	3.3V ~ 5.5V
Switching Frequency	200kHz ~ 1.5MHz	200kHz ~ 1.5MHz
Duty Cycle (Max)	85%	85%
Synchronous Rectifier	Yes	Yes
Clock Sync	Yes	Yes
Control Features	Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking	Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Package / Case	32-WQFN Exposed Pad	32-WQFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
Packaging Type	Not specified	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The LM3000SQ/NOPB is the direct substitute for the obsolete LM3000ASQ/NOPB. Both parts share identical electrical specifications, control feature sets, and package configurations. The primary distinction is product status: the LM3000ASQ/NOPB is obsolete while the LM3000SQ/NOPB maintains active production status.

Selection of the LM3000SQ/NOPB ensures:

Full parametric compatibility with existing designs
Continued availability through active manufacturing
Identical compliance certifications (ROHS3, MSL Level 1)
No circuit redesign or layout modification required
Equivalent thermal and electrical performance characteristics

Both parts are supplied in 32-WQFN packages with exposed pads suitable for surface mount assembly. The LM3000SQ/NOPB is available in Tape & Reel packaging format for production environments.

Frequently Asked Questions (FAQ)

Q: Can the LM3000SQ/NOPB directly replace the LM3000ASQ/NOPB in existing designs?

A: Yes. The LM3000SQ/NOPB is a parametric equivalent with identical electrical specifications, control features, operating temperature range, and 32-WQFN package configuration. No circuit modifications are required.

Q: What is the primary reason for substitution?

A: The LM3000ASQ/NOPB is classified as obsolete. The LM3000SQ/NOPB provides equivalent functionality with active production status, ensuring long-term supply availability.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 32-WQFN (5x5mm) package with exposed pad. Surface mount assembly processes and PCB layouts are compatible without modification.

Q: Do both parts support the same control features?

A: Yes. Both the LM3000ASQ/NOPB and LM3000SQ/NOPB include Current Limit, Enable, Frequency Control, Power Good, Soft Start, and Tracking control features.

Q: What is the difference in packaging format?

A: The LM3000ASQ/NOPB packaging format is not specified in available documentation. The LM3000SQ/NOPB is supplied in Tape & Reel (TR) format, standard for production volume applications.

Q: Are compliance certifications equivalent?

A: Yes. Both parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting identical environmental and regulatory requirements.

Q: What supply voltage range do these parts support?

A: Both parts operate with supply voltage (Vcc/Vdd) in the range of 3.3V ~ 5.5V with switching frequency capability from 200kHz to 1.5MHz.

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