LM34930TL/NOPB Equivalent & Substitute Parts

Part Overview

The LM34930TL/NOPB is a buck switching regulator IC manufactured by Texas Instruments, designed for positive adjustable output applications. This device operates as a step-down converter with a single adjustable output ranging from 2.5V to 30V and delivers 1A of output current. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

LM34930TL/NOPB

Texas InstrumentsIn Stock: 755LM34930TL/NOPB Datasheet

Current PartRFQ

LM34917ATL/NOPB

National SemiconductorIn Stock: 925LM34917ATL/NOPB Datasheet

MFR RecommendedRFQ

LM34919CQTL/NOPB

Texas InstrumentsIn Stock: 1529LM34919CQTL/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM34930TL/NOPB is determined by the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator topology
• Output Configuration: Positive adjustable output
• Package Compatibility: 12-WFBGA (12-DSBGA) surface mount package
• Voltage Range: Input 8V minimum, output adjustable from 2.5V minimum
• Output Current Capability: Minimum 1A required
• Operating Temperature Range: -40°C to 125°C (TJ)
• Synchronous Rectifier: Not required

Two active substitute parts meet these criteria with variations in output current capability and input voltage range.

Parameter Comparison

Engineering Selection Recommendations

LM34917ATL/NOPB is the primary substitute for the LM34930TL/NOPB. This part maintains identical input voltage range (8V to 33V), output voltage range (2.5V to 30V), and package configuration (12-WFBGA). The output current is increased to 1.25A, providing additional design margin. The part is currently in active production status, ensuring long-term availability. National Semiconductor manufacturing provides continuity for legacy designs.

LM34919CQTL/NOPB is an alternative substitute with extended input voltage range (4.5V to 50V) and higher maximum output voltage (45V). However, the output current is reduced to 600mA, which is below the original 1A specification. This part is suitable only for applications where the 600mA output current is sufficient. The LM34919CQTL/NOPB carries AEC-Q100 automotive qualification and is manufactured by Texas Instruments, the original manufacturer of the LM34930TL/NOPB. This part is recommended for automotive or high-reliability applications requiring extended voltage range.

Frequently Asked Questions (FAQ)

Q: Can the LM34917ATL/NOPB directly replace the LM34930TL/NOPB?

A: Yes. Both parts share identical input voltage range (8V to 33V), output voltage range (2.5V to 30V), and 12-WFBGA package. The LM34917ATL/NOPB provides higher output current (1.25A vs. 1A), making it a direct functional replacement with improved current capability.

Q: Why is the LM34919CQTL/NOPB listed as an alternative if it has lower output current?

A: The LM34919CQTL/NOPB is suitable for applications where 600mA output current meets design requirements. It offers extended input voltage range (4.5V to 50V) and higher maximum output voltage (45V), making it applicable to different system architectures. Selection depends on specific application current and voltage requirements.

Q: Are there package compatibility concerns between these parts?

A: All three parts use the 12-WFBGA (12-DSBGA) surface mount package. PCB layout and footprint compatibility is maintained across all substitutes.

Q: What is the significance of the LM34919CQTL/NOPB AEC-Q100 qualification?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This qualification is relevant only for automotive applications. For non-automotive applications, this qualification provides no additional benefit.

Q: Is RoHS compliance maintained with all substitutes?

A: The LM34930TL/NOPB and LM34919CQTL/NOPB are both ROHS3 compliant. RoHS status for the LM34917ATL/NOPB is not specified in available documentation.