LP2951ACSD/NOPB Equivalent & Substitute Parts

Part Overview

The LP2951ACSD/NOPB 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 part is Active status and widely used in power management applications requiring low-dropout regulation with adjustable output voltage configuration.

Substitute parts are identified when designs require alternative packaging options, different manufacturing batches, or inventory optimization while maintaining identical electrical and mechanical specifications.

Substiute Parts

LP2951ACSD/NOPB

Texas InstrumentsIn Stock: 30460LP2951ACSD/NOPB Datasheet

Current PartRFQ

LP2951ACSDX/NOPB

Texas InstrumentsIn Stock: 9219LP2951ACSDX/NOPB Datasheet

Parametric EquivalentRFQ

LP2951CSD/NOPB

Texas InstrumentsIn Stock: 2265LP2951CSD/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2951ACSD/NOPB are identified based on matching all critical electrical and mechanical parameters. The substitution logic is based on the following key parameters that must remain identical:

• Output Configuration: Positive
• Output Type: Adjustable (Fixed)
• Number of Regulators: 1
• Voltage ratings: Input (Max) 30V, Output (Min/Fixed) 1.235V (5V), Output (Max) 29V
• Voltage Dropout: 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)
• Base Product Number: LP2951
• Product Status: Active
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

Variations in packaging format (Cut Tape vs. Digi-Reel) do not affect electrical or mechanical compatibility and are considered equivalent for circuit design purposes.

Parameter Comparison

Engineering Selection Recommendations

All three parts—LP2951ACSD/NOPB, LP2951ACSDX/NOPB, and LP2951CSD/NOPB—are Active status products from Texas Instruments with identical electrical specifications and mechanical compatibility. Selection between these parts is based on packaging format and inventory availability rather than functional differences.

LP2951ACSD/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format with 30,400 pieces in stock. LP2951ACSDX/NOPB offers the same electrical performance with 9,200 pieces available. LP2951CSD/NOPB is also supplied in Cut Tape (CT) & Digi-Reel® format with 2,200 pieces in stock.

All parts meet ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity requirements, making them suitable for standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can LP2951ACSDX/NOPB be used as a direct replacement for LP2951ACSD/NOPB?

A: Yes. Both parts share identical electrical specifications, output configuration, voltage ratings, current ratings, protection features, and operating temperature range. The only difference is packaging format. Both are suitable for direct circuit substitution.

Q: What is the difference between LP2951ACSD/NOPB and LP2951CSD/NOPB?

A: These parts are electrically and mechanically identical. Both use the 8-WSON (4x4) package with 8-WDFN Exposed Pad configuration. The difference lies in manufacturing batch designation (A vs. C grade) and inventory availability. Both are Active status products meeting identical compliance standards.

Q: Are packaging format differences (Cut Tape vs. Digi-Reel) significant for circuit design?

A: No. Packaging format affects only handling, storage, and assembly processes. Electrical and mechanical specifications remain identical. Circuit design compatibility is unaffected by packaging format selection.

Q: Do all three substitute parts meet the same compliance requirements?

A: Yes. LP2951ACSD/NOPB, LP2951ACSDX/NOPB, and LP2951CSD/NOPB all meet ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) requirements. All are suitable for applications requiring these certifications.

Q: What determines whether a part can substitute for the LP2951ACSD/NOPB?

A: Substitution is determined by matching all electrical parameters (voltage ratings, current ratings, dropout voltage, quiescent current), output configuration (positive adjustable), protection features (over-current, over-temperature, short-circuit), operating temperature range (-40°C ~ 125°C), and mechanical specifications (8-WSON 4x4 package, Surface Mount). Parts meeting all these criteria are functionally equivalent.