LP2951ACSDX Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LP2951ACSDX 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 LP2951ACSDX carries an Obsolete product status. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications requiring this regulator topology and electrical performance.

Substiute Parts

LP2951ACSDX

Texas InstrumentsIn Stock: 4360LP2951ACSDX Datasheet

Current PartRFQ

LP2951ACSDX/NOPB

Texas InstrumentsIn Stock: 9219LP2951ACSDX/NOPB Datasheet

DirectRFQ

LP2951ACSD/NOPB

Texas InstrumentsIn Stock: 30460LP2951ACSD/NOPB Datasheet

Parametric EquivalentRFQ

LP2951CSD/NOPB

Texas InstrumentsIn Stock: 2265LP2951CSD/NOPB Datasheet

Parametric EquivalentRFQ

LP2951CSDX/NOPB

Texas InstrumentsIn Stock: 4910LP2951CSDX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2951ACSDX are 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 (5V)
• 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)

All substitute parts listed maintain identical electrical specifications and package footprint compatibility. Variations in product status, RoHS compliance, and packaging format (Cut Tape, Digi-Reel, Tape & Reel) do not affect functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain complete electrical and mechanical equivalence to the LP2951ACSDX. Selection among available substitutes should be based on the following factors:

Product Status: LP2951ACSDX carries Obsolete status. All substitute parts (LP2951ACSDX/NOPB, LP2951ACSD/NOPB, LP2951CSD/NOPB, LP2951CSDX/NOPB) are Active products, ensuring long-term availability and supply chain stability.

RoHS Compliance: The original LP2951ACSDX is RoHS non-compliant. All substitute parts are ROHS3 Compliant, meeting current regulatory requirements for new designs and manufacturing environments.

Packaging Format: Selection between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) formats depends on assembly process requirements and volume specifications. Electrical performance remains identical across all packaging formats.

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

Frequently Asked Questions (FAQ)

Q: Are all listed substitute parts functionally identical to the LP2951ACSDX?

A: Yes. All substitute parts maintain identical electrical specifications including output voltage range (1.235V to 29V), output current (100mA), dropout voltage (0.6V @ 100mA), quiescent current (120 µA), and protection features (over-current, over-temperature, short-circuit). Package footprint and pinout are identical across all variants.

Q: What is the difference between LP2951ACSDX and LP2951ACSDX/NOPB?

A: The /NOPB suffix indicates "No Plumbum" (lead-free) packaging. Both parts are electrically identical. LP2951ACSDX/NOPB is Active status with ROHS3 compliance, while LP2951ACSDX is Obsolete and RoHS non-compliant.

Q: Can I substitute LP2951CSD/NOPB or LP2951CSDX/NOPB for LP2951ACSDX?

A: Yes. These parts are parametric equivalents with identical electrical performance and package specifications. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging?

A: Both are Surface Mount packaging formats for automated assembly. Cut Tape & Digi-Reel® is suitable for lower-volume or mixed-component orders. Tape & Reel is optimized for high-volume production runs. Electrical specifications and component performance are identical.

Q: Why should I choose an Active product over the Obsolete LP2951ACSDX?

A: Active products ensure continued manufacturing support, long-term availability, and supply chain reliability. Obsolete products face discontinuation risk and limited inventory. For new designs or production continuity, Active substitutes are recommended.

Q: Are there any temperature or voltage rating differences between substitute parts?

A: No. All substitute parts operate across the identical temperature range (-40°C to 125°C junction temperature) and support the same input voltage (30V max) and output voltage specifications (1.235V to 29V).