LP3883ES-1.5 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3883ES-1.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed positive 1.5V output at 3A maximum current in a TO-263 (DDPAK-5) surface mount package. The main part number LP3883ES-1.5 is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

Substiute Parts

LP3883ES-1.5

Texas InstrumentsIn Stock: 1461LP3883ES-1.5 Datasheet

Current PartRFQ

LP3883ES-1.5/NOPB

Texas InstrumentsIn Stock: 750LP3883ES-1.5/NOPB Datasheet

DirectRFQ

LP38843S-1.5/NOPB

Texas InstrumentsIn Stock: 1212LP38843S-1.5/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3883ES-1.5 are identified based on strict electrical and mechanical parameter matching within the Power Management (PMIC) category. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Output voltage: 1.5V fixed
• Output current capability: 3A
• Input voltage maximum: 5.5V
• Package type: TO-263 (DDPAK-5) surface mount
• Operating temperature range: -40°C ~ 125°C
• Protection features: Over Current, Over Temperature, Short Circuit
• Control features: Enable function

Substitute parts are grouped into two categories based on their relationship to the main part:

Direct Manufacturer Substitute: Parts with identical electrical specifications and the same base product series (LP3883), differing only in packaging designation or lead finish (NOPB designation).

Parametric Equivalent: Parts from the same manufacturer with equivalent functional performance across all critical parameters, though potentially from a different product series (LP38843), with allowable variations in non-critical specifications such as quiescent current supply maximum or dropout voltage within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

LP3883ES-1.5/NOPB is the primary substitute for the obsolete LP3883ES-1.5. Both parts share identical electrical specifications and belong to the same LP3883 product series. The key distinction is product status: LP3883ES-1.5/NOPB is currently active and available in production quantities. Additionally, LP3883ES-1.5/NOPB carries ROHS3 compliance, whereas the original part is RoHS non-compliant. This substitute provides direct functional equivalence with improved regulatory compliance.

LP38843S-1.5/NOPB serves as a parametric equivalent when LP3883ES-1.5/NOPB is unavailable. This part maintains all critical electrical parameters: 1.5V fixed output, 3A output current, 5.5V maximum input voltage, identical protection and control features, and the same TO-263 package. The LP38843S-1.5/NOPB differs in two non-critical specifications: maximum dropout voltage increases from 0.42V to 0.5V, and maximum supply current increases from 8 mA to 40 mA. Both parts are ROHS3 compliant and actively produced. Selection of LP38843S-1.5/NOPB is appropriate when the slightly higher dropout voltage and supply current do not conflict with circuit design requirements.

Frequently Asked Questions (FAQ)

Q: Can LP3883ES-1.5/NOPB directly replace LP3883ES-1.5 in existing designs?

A: Yes. LP3883ES-1.5/NOPB is a direct substitute with identical electrical specifications, the same TO-263 package footprint, and equivalent pin configuration. The primary difference is product status (active vs. obsolete) and improved RoHS compliance. No circuit modifications are required.

Q: What is the difference between LP3883ES-1.5/NOPB and LP38843S-1.5/NOPB?

A: Both parts deliver 1.5V at 3A with identical output configuration, protection features, and package type. LP38843S-1.5/NOPB has a maximum dropout voltage of 0.5V compared to 0.42V for LP3883ES-1.5/NOPB, and a maximum supply current of 40 mA versus 8 mA. These differences are acceptable in most applications but should be verified against specific circuit requirements.

Q: Are all three parts compatible with the same PCB layout?

A: Yes. All three parts use the TO-263 (DDPAK-5) surface mount package with identical pinout and footprint. PCB layout and thermal management considerations remain unchanged across all three part numbers.

Q: What is the significance of the NOPB designation?

A: NOPB indicates "No Plumbum" (lead-free) packaging, reflecting RoHS compliance. This designation distinguishes the part from older lead-containing versions and confirms compliance with environmental regulations.

Q: Which substitute should be selected for new designs?

A: LP3883ES-1.5/NOPB is the recommended choice for new designs due to its active production status, direct electrical equivalence, and ROHS3 compliance. LP38843S-1.5/NOPB is an acceptable alternative when the former is unavailable, provided the higher dropout voltage and supply current specifications are acceptable for the application.

Q: Are there any thermal or reliability differences between these parts?

A: All three parts share identical operating temperature ranges (-40°C ~ 125°C), moisture sensitivity levels (MSL 3), and protection features. Thermal performance is determined by the TO-263 package characteristics, which are identical across all three parts.