LP3871ET-1.8/NOPB Equivalent & Substitute Parts

Part Overview

The LP3871ET-1.8/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output applications with 800mA current capacity in a TO-220-5 package. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity. The device provides regulated 1.8V output with integrated protection features including over-current, over-temperature, and short-circuit protection, along with an enable control function.

Substiute Parts

LP3871ET-1.8/NOPB

Texas InstrumentsIn Stock: 1193LP3871ET-1.8/NOPB Datasheet

Current PartRFQ

LP38513T-1.8/NOPB

Texas InstrumentsIn Stock: 957LP38513T-1.8/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP3871ET-1.8/NOPB is determined by the following critical parameters:

• Fixed output voltage of 1.8V
• TO-220-5 package with through-hole mounting
• Positive output configuration with single regulator
• Enable control feature and integrated protection (over-current, over-temperature, short-circuit)
• Operating temperature range of -40°C to 125°C
• RoHS3 compliance and REACH unaffected status

The LP38513T-1.8/NOPB qualifies as a manufacturer-recommended substitute because it maintains identical output voltage, package type, mounting method, control features, and protection characteristics. The substitute part is active in production status and provides enhanced specifications in key areas including higher maximum input voltage (5.5V vs 7V) and significantly increased output current capacity (3A vs 800mA).

Parameter Comparison

Engineering Selection Recommendations

The LP38513T-1.8/NOPB is the manufacturer-recommended substitute for the obsolete LP3871ET-1.8/NOPB. Both devices maintain identical output voltage specification, package configuration, and thermal operating range. The substitute part carries active product status from Texas Instruments, ensuring long-term availability and supply chain continuity.

Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement. The LP38513T-1.8/NOPB provides superior current delivery capability (3A versus 800mA), making it suitable for applications requiring the original 800mA specification and those with potential future current demands within the 3A range.

Design considerations include the reduced maximum input voltage specification of the substitute part (5.5V versus 7V) and the slightly increased voltage dropout at rated current. These parameters must be evaluated against specific application requirements to confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LP38513T-1.8/NOPB directly replace the LP3871ET-1.8/NOPB in existing designs?

A: Yes, the LP38513T-1.8/NOPB is the manufacturer-recommended substitute. Both parts share identical output voltage (1.8V), TO-220-5 package configuration, through-hole mounting, enable control feature, and integrated protection functions. Pin compatibility and functional equivalence are maintained.

Q: What are the key differences between these two parts?

A: The primary differences are product status (obsolete versus active), output current capacity (800mA versus 3A), maximum input voltage (7V versus 5.5V), and quiescent current (5mA versus 10mA). The substitute part offers higher current capability and improved PSRR performance across a wider frequency range.

Q: Are there any compliance or certification differences?

A: Both parts maintain identical RoHS3 compliance status and REACH unaffected classification. Moisture sensitivity level (MSL) rating is 1 (Unlimited) for both devices, indicating no special handling requirements during storage or assembly.

Q: What should be verified when implementing the LP38513T-1.8/NOPB as a substitute?

A: Verify that the application's maximum input voltage does not exceed 5.5V, as the substitute part has a lower maximum input specification than the original. Confirm that the increased quiescent current (10mA versus 5mA) is acceptable for the application's power budget. Evaluate the slightly higher voltage dropout at rated current against system requirements.

Q: Is the TO-220-5 package identical between both parts?

A: Yes, both parts use TO-220-5 Formed Leads package with through-hole mounting. PCB layout and thermal management considerations remain consistent between the original and substitute part.