LP3878SD-ADJ/NOPB Equivalent & Substitute Parts

Part Overview

The LP3878SD-ADJ/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 800mA output current in an 8-WSON (4x4) surface mount package and operates across an input voltage range of up to 16V with adjustable output from 1V to 5.5V. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this regulator's specifications or compatible alternatives.

Substiute Parts

LP3878SD-ADJ/NOPB

Texas InstrumentsIn Stock: 76377LP3878SD-ADJ/NOPB Datasheet

Current PartRFQ

TPS7A4701RGWR

Texas InstrumentsIn Stock: 6524TPS7A4701RGWR Datasheet

MFR RecommendedRFQ

LP3878SDX-ADJ/NOPB

Texas InstrumentsIn Stock: 76430LP3878SDX-ADJ/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3878SD-ADJ/NOPB are classified based on functional and parametric compatibility:

Parametric Equivalent: LP3878SDX-ADJ/NOPB shares identical electrical specifications including 800mA output current, 1V to 5.5V adjustable output range, 16V maximum input voltage, and 1.1V dropout voltage. Both devices use the same 8-WSON (4x4) package and maintain equivalent control features (Enable) and protection mechanisms (Over Current, Over Temperature, Short Circuit). This part is a direct parametric match suitable for pin-compatible replacement.

Manufacturer Recommended Substitute: TPS7A4701RGWR is designated as the manufacturer-recommended alternative. While this device operates in a different package format (20-VQFN), it provides enhanced electrical performance including higher output current (1A versus 800mA), wider input voltage range (35V maximum), extended output voltage range (1.4V to 34V), and improved dropout voltage (0.45V @ 1A). The TPS7A4701RGWR is in Active product status, ensuring continued availability and support.

Substitution logic is based on the following key parameters: output current capability, input voltage range, adjustable output voltage range, dropout voltage, package compatibility, and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The LP3878SDX-ADJ/NOPB is the appropriate choice when pin-compatible, package-identical substitution is required. This part maintains all electrical specifications of the original LP3878SD-ADJ/NOPB and is suitable for applications where the 8-WSON package footprint and 800mA output current are design constraints. Both parts carry Last Time Buy status, indicating limited future availability.

For Long-Term Design Continuity: The TPS7A4701RGWR is the manufacturer-recommended substitute for new designs or applications requiring extended product lifecycle support. This device is in Active product status, ensuring sustained manufacturing and supply chain availability. The TPS7A4701RGWR provides superior electrical performance with higher output current (1A), wider input voltage range (35V), extended output voltage range (1.4V to 34V), and lower dropout voltage (0.45V @ 1A). The 20-VQFN package requires PCB layout modification but offers enhanced thermal management and additional protection features including Under Voltage Lockout (UVLO).

All substitute parts are ROHS3 compliant and operate across the same temperature range (-40°C ~ 125°C), ensuring regulatory and thermal compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can LP3878SDX-ADJ/NOPB be used as a direct replacement for LP3878SD-ADJ/NOPB?

A: Yes. The LP3878SDX-ADJ/NOPB is a parametric equivalent with identical electrical specifications, package format (8-WSON 4x4), and pin configuration. No circuit modifications are required for substitution.

Q: What are the key differences between LP3878SD-ADJ/NOPB and TPS7A4701RGWR?

A: The primary differences are output current (800mA versus 1A), input voltage range (16V versus 35V), adjustable output range (1V-5.5V versus 1.4V-34V), dropout voltage (1.1V versus 0.45V @ rated current), and package format (8-WSON versus 20-VQFN). The TPS7A4701RGWR offers enhanced performance and Active product status.

Q: Is the TPS7A4701RGWR pin-compatible with LP3878SD-ADJ/NOPB?

A: No. The TPS7A4701RGWR uses a 20-VQFN package compared to the 8-WSON package of the LP3878SD-ADJ/NOPB. PCB layout and schematic modifications are required for substitution.

Q: Why is LP3878SD-ADJ/NOPB in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer has discontinued active production. Existing inventory is available for purchase, but no future manufacturing is planned. Transition to an Active product such as TPS7A4701RGWR is recommended for new designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. LP3878SD-ADJ/NOPB, LP3878SDX-ADJ/NOPB, and TPS7A4701RGWR are all ROHS3 compliant and suitable for applications requiring RoHS certification.

Q: What is the moisture sensitivity level difference between these parts?

A: LP3878SD-ADJ/NOPB and LP3878SDX-ADJ/NOPB have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. TPS7A4701RGWR has MSL 2 (1 Year), requiring storage and handling within specified humidity conditions for one year from manufacturing date.