LP2951CSDX/NOPB Equivalent & Substitute Parts

Part Overview

The LP2951CSDX/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 ROHS3 compliant, making it suitable for modern electronic applications requiring regulated power management.

Substitute parts are identified when design requirements necessitate alternative packaging formats, inventory availability, or supply chain optimization while maintaining identical electrical and mechanical specifications.

Substiute Parts

LP2951CSDX/NOPB

Texas InstrumentsIn Stock: 4910LP2951CSDX/NOPB Datasheet

Current PartRFQ

LP2951ACSD/NOPB

Texas InstrumentsIn Stock: 30460LP2951ACSD/NOPB Datasheet

Parametric EquivalentRFQ

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 LP2951CSDX/NOPB are identified based on parametric equivalence within the LP2951 base product family. All substitute parts maintain identical electrical specifications across the following critical parameters:

• Output configuration (Positive)
• Output type (Adjustable/Fixed)
• Voltage ratings (Input Max: 30V, Output Min/Fixed: 1.235V/5V, Output Max: 29V)
• Current specifications (Output: 100mA, Quiescent: 120 µA, Supply Max: 14 mA)
• Dropout voltage (0.6V @ 100mA)
• Protection features (Over Current, Over Temperature, Short Circuit)
• Operating temperature range (-40°C ~ 125°C)
• Package type (8-WDFN Exposed Pad / 8-WSON 4x4)
• Compliance certifications (ROHS3, REACH Unaffected)

Substitution differences are limited to packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and temperature grade designation within the same product line.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status with ROHS3 compliance and REACH Unaffected certification, ensuring regulatory alignment with current manufacturing standards. Selection between LP2951CSDX/NOPB and its substitutes should be based on:

Packaging format requirements: LP2951ACSD/NOPB and LP2951CSD/NOPB are supplied in Cut Tape & Digi-Reel format, suitable for automated pick-and-place assembly operations. LP2951CSDX/NOPB is supplied in Tape & Reel format for high-volume production environments.

Inventory availability: LP2951ACSD/NOPB offers the highest stock level (30400 Pcs), followed by LP2951ACSDX/NOPB (9200 Pcs), LP2951CSDX/NOPB (4800 Pcs), and LP2951CSD/NOPB (2200 Pcs).

Temperature grade designation: The "A" suffix in LP2951ACSD/NOPB and LP2951ACSDX/NOPB indicates a specific temperature grade variant within the LP2951 family, while "C" suffix variants (LP2951CSDX/NOPB and LP2951CSD/NOPB) represent an alternative grade. Both grades operate across the identical -40°C ~ 125°C range.

All parts are manufactured by Texas Instruments and share the same 8-WDFN Exposed Pad package footprint, ensuring PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can LP2951ACSD/NOPB be used as a direct replacement for LP2951CSDX/NOPB?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, output configuration, voltage ratings, current ratings, protection features, and operating temperature range. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). PCB footprint and pin configuration are identical.

Q: What is the difference between the "A" and "C" temperature grade designations?

A: Both temperature grades operate across the identical -40°C ~ 125°C junction temperature range. The designation reflects internal product line categorization by Texas Instruments. Electrical performance and specifications remain equivalent across both grades.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts, including LP2951CSDX/NOPB, LP2951ACSD/NOPB, LP2951ACSDX/NOPB, and LP2951CSD/NOPB, are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

Q: Which packaging format should I select for my application?

A: Tape & Reel (TR) packaging is optimized for high-volume automated assembly lines. Cut Tape & Digi-Reel format is suitable for lower-volume production, prototyping, or mixed-component assembly operations. Both formats contain the same 8-WSON (4x4) component with identical electrical performance.

Q: Do all substitute parts use the same 8-WSON package?

A: Yes. All parts in this substitution group use the 8-WDFN Exposed Pad package with 8-WSON (4x4) supplier designation. Pin configuration, footprint, and thermal characteristics are identical across all variants.

Q: What inventory considerations should guide my part selection?

A: LP2951ACSD/NOPB has the highest available inventory (30400 Pcs), making it the preferred choice for supply chain continuity. If this part is unavailable, LP2951ACSDX/NOPB (9200 Pcs) and LP2951CSDX/NOPB (4800 Pcs) are viable alternatives. LP2951CSD/NOPB has the lowest inventory level (2200 Pcs).