LP3876ESX-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP3876ESX-3.3/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 3.3V output at 3A maximum current in a TO-263 (DDPAK-5) surface mount package. The device is currently obsolete, necessitating identification of active equivalent and substitute parts for new designs or production continuity. This reference provides parametric equivalents and alternatives suitable for direct component selection based on electrical and mechanical compatibility.

Substiute Parts

LP3876ESX-3.3/NOPB

Texas InstrumentsIn Stock: 1083LP3876ESX-3.3/NOPB Datasheet

Current PartRFQ

LP3853ESX-3.3/NOPB

Texas InstrumentsIn Stock: 10410LP3853ESX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3856ESX-3.3/NOPB

Texas InstrumentsIn Stock: 1489LP3856ESX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3873ESX-3.3/NOPB

Texas InstrumentsIn Stock: 1916LP3873ESX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3963ESX-3.3

Texas InstrumentsIn Stock: 1533LP3963ESX-3.3 Datasheet

Parametric EquivalentRFQ

LP3963ESX-3.3/NOPB

National SemiconductorIn Stock: 1478LP3963ESX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

LP3966ESX-3.3/NOPB

National SemiconductorIn Stock: 2042LP3966ESX-3.3/NOPB Datasheet

Parametric EquivalentRFQ

MCP1827-3302E/ET

Microchip TechnologyIn Stock: 1473MCP1827-3302E/ET Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP3876ESX-3.3/NOPB is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• Maximum output current of 3A
• Maximum input voltage of 7V
• TO-263 (DDPAK-5) package compatibility
• Operating temperature range of -40°C to 125°C
• Enable control feature
• Protection against over current, over temperature, and short circuit conditions
• RoHS3 compliance

Substitute parts are grouped into two categories: parametric equivalents with identical or superior electrical characteristics, and manufacturer-recommended alternatives with functional compatibility but different current ratings or performance specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Full Parametric Equivalents):

LP3853ESX-3.3/NOPB and LP3856ESX-3.3/NOPB are active Texas Instruments products with identical output voltage, current rating, and package configuration. Both feature improved dropout voltage performance (0.6V @ 3A versus 1.2V @ 3A) and lower quiescent current (4 mA versus 5 mA). Both are RoHS3 compliant and suitable for direct replacement in new designs.

LP3873ESX-3.3/NOPB is an active Texas Instruments alternative with matching output specifications and dropout voltage identical to the original part. Quiescent current is elevated at 9 mA. RoHS3 compliance is confirmed.

Secondary Substitutes (Functional Equivalents):

LP3963ESX-3.3 and LP3963ESX-3.3/NOPB are available from Texas Instruments and National Semiconductor respectively, both in Last Time Buy or Active status. These parts maintain 3.3V output at 3A with identical dropout voltage and quiescent current specifications to LP3873ESX-3.3/NOPB.

LP3966ESX-3.3/NOPB from National Semiconductor is an active product with identical electrical specifications to the LP3963 variants.

Alternative with Reduced Current Rating:

MCP1827-3302E/ET from Microchip Technology is an active product in the same TO-263-5 package. This part delivers 3.3V output but at a reduced maximum current of 1.5A. Selection of this part is appropriate only for applications requiring less than 1.5A output current. The device features superior dropout voltage (0.6V @ 1.5A) and RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can LP3853ESX-3.3/NOPB or LP3856ESX-3.3/NOPB be used as direct replacements for LP3876ESX-3.3/NOPB?

A: Yes. Both parts deliver identical output voltage (3.3V) and current (3A) in the same TO-263-5 package. Both are active products from Texas Instruments with RoHS3 compliance. The improved dropout voltage (0.6V versus 1.2V) and lower quiescent current represent performance enhancements suitable for direct PCB substitution without design modification.

Q: What is the difference between LP3873ESX-3.3/NOPB and LP3853ESX-3.3/NOPB?

A: Both parts deliver 3.3V at 3A in TO-263-5 packaging. LP3853ESX-3.3/NOPB features lower dropout voltage (0.6V @ 3A) and quiescent current (4 mA). LP3873ESX-3.3/NOPB has higher dropout voltage (1.2V @ 3A) and quiescent current (9 mA), matching the original LP3876ESX-3.3/NOPB specifications more closely.

Q: Is MCP1827-3302E/ET suitable for all applications using LP3876ESX-3.3/NOPB?

A: MCP1827-3302E/ET is suitable only for applications requiring maximum output current of 1.5A or less. The part is not recommended for applications requiring the full 3A output current of the original device. Package compatibility (TO-263-5) and output voltage (3.3V) are maintained.

Q: Are all substitute parts RoHS3 compliant?

A: LP3853ESX-3.3/NOPB, LP3856ESX-3.3/NOPB, LP3873ESX-3.3/NOPB, and MCP1827-3302E/ET are confirmed RoHS3 compliant. RoHS3 compliance status is not specified for LP3963ESX-3.3, LP3963ESX-3.3/NOPB, and LP3966ESX-3.3/NOPB.

Q: What is the significance of "Last Time Buy" status for LP3963ESX-3.3?

A: Last Time Buy status indicates the manufacturer will accept orders for a limited period before discontinuing the product. Existing inventory may be available, but long-term availability is not assured. For new designs, selection of active status parts (LP3853ESX-3.3/NOPB, LP3856ESX-3.3/NOPB, or LP3873ESX-3.3/NOPB) is recommended.

Q: Can packaging format (Tape & Reel versus Bulk) affect substitution decisions?

A: Packaging format affects procurement and handling but does not impact electrical or mechanical compatibility. All substitute parts listed are available in TO-263-5 package configuration suitable for surface mount assembly. Packaging format selection depends on production volume and assembly process requirements.