LP2951CSD-3.0 Equivalent & Substitute Parts

Part Overview

The LP2951CSD-3.0 is a linear voltage regulator IC from Texas Instruments designed for positive adjustable (fixed) output applications. This Surface Mount device delivers 100mA output current in an 8-WSON (4x4) package with integrated protection features including over-current, over-temperature, and short-circuit protection.

The LP2951CSD-3.0 is classified as Obsolete. Locating equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this regulator topology.

Substiute Parts

LP2951CSD-3.0

Texas InstrumentsIn Stock: 734LP2951CSD-3.0 Datasheet

Current PartRFQ

LP2951CSD-3.0/NOPB

Texas InstrumentsIn Stock: 3410LP2951CSD-3.0/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP2951CSD-3.0 is determined by strict equivalence across the following critical parameters:

• Output Configuration: Positive
• Output Type: Adjustable (Fixed)
• Number of Regulators: 1
• Voltage - Input (Max): 30V
• Voltage - Output (Min/Fixed): 1.235V (3V)
• Voltage - Output (Max): 29V
• Voltage Dropout (Max): 0.6V @ 100mA
• Current - Output: 100mA
• Current - Quiescent (Iq): 120 µA
• Current - Supply (Max): 14 mA
• Control Features: Enable
• Protection Features: Over Current, Over Temperature, Short Circuit
• Operating Temperature: -40°C ~ 125°C (TJ)
• Mounting Type: Surface Mount
• Package / Case: 8-WDFN Exposed Pad
• Supplier Device Package: 8-WSON (4x4)

Parts meeting all these criteria are classified as direct functional equivalents and may be substituted without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

The LP2951CSD-3.0/NOPB is a direct functional equivalent to the LP2951CSD-3.0. Both devices share identical electrical specifications, output characteristics, protection features, and package geometry.

The primary distinction is product status: LP2951CSD-3.0 is Obsolete, while LP2951CSD-3.0/NOPB is Active. The substitute part carries ROHS3 compliance, whereas the original is RoHS non-compliant. The substitute is available in Cut Tape (CT) and Digi-Reel® packaging options, providing improved supply chain accessibility.

For new designs or production continuity, LP2951CSD-3.0/NOPB is the appropriate selection due to its active status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can LP2951CSD-3.0/NOPB be used as a direct replacement for LP2951CSD-3.0?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The suffix "/NOPB" indicates lead-free (no-lead) processing, which does not affect functional compatibility.

Q: What does the "/NOPB" suffix indicate?

A: NOPB denotes "No Plumbum" (no lead), indicating the part is manufactured using lead-free solder processes and meets RoHS3 compliance requirements.

Q: Are there packaging differences between these parts?

A: Both use the 8-WSON (4x4) package. The substitute is available in Cut Tape (CT) and Digi-Reel® packaging formats, while the original part number does not specify packaging options in the provided data.

Q: Why is the original part marked as Obsolete?

A: Product obsolescence is determined by the manufacturer. The LP2951CSD-3.0/NOPB remains in active production and serves as the current equivalent.

Q: Are the electrical specifications identical?

A: Yes. Input voltage range, output voltage range, dropout voltage, output current, quiescent current, protection features, and operating temperature range are identical between both parts.

Q: What is the inventory status?

A: LP2951CSD-3.0 has 659 pieces in stock (Obsolete status). LP2951CSD-3.0/NOPB has 3300 pieces in stock (Active status), providing superior supply chain availability.