LP38843S-1.5 Equivalent & Substitute Parts

Part Overview

The LP38843S-1.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.5V output at 3A in a TO-263 (DDPAK-5) surface mount package. The main part number LP38843S-1.5 carries an Obsolete product status, making identification of active equivalent parts essential for new designs and production continuity. Direct substitutes with Active status and improved compliance certifications are available from the same manufacturer.

Substiute Parts

LP38843S-1.5

Texas InstrumentsIn Stock: 830LP38843S-1.5 Datasheet

Current PartRFQ

LP38843S-1.5/NOPB

Texas InstrumentsIn Stock: 1212LP38843S-1.5/NOPB Datasheet

DirectRFQ

LP3883ES-1.5/NOPB

Texas InstrumentsIn Stock: 750LP3883ES-1.5/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP38843S-1.5 is determined by strict equivalence across the following critical parameters:

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

Two substitute parts meet these criteria. The LP38843S-1.5/NOPB is a direct part number variant with identical electrical specifications and Active product status. The LP3883ES-1.5/NOPB is a parametric equivalent from the same manufacturer with improved electrical performance characteristics while maintaining functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production applications, LP38843S-1.5/NOPB is the primary substitute. It maintains identical electrical specifications to the obsolete LP38843S-1.5 while carrying Active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

The LP3883ES-1.5/NOPB serves as an alternative parametric equivalent with improved performance characteristics. It delivers lower voltage dropout (0.42V versus 0.5V at 3A) and significantly reduced supply current (8 mA versus 40 mA), resulting in lower power dissipation in applications with extended idle periods. This part also maintains Active status and ROHS3 compliance. Both substitute parts are functionally compatible within the specified electrical and thermal operating ranges.

Frequently Asked Questions (FAQ)

Q: Can LP38843S-1.5/NOPB directly replace LP38843S-1.5 in existing designs?

A: Yes. LP38843S-1.5/NOPB is a direct equivalent with identical electrical specifications, output voltage, current rating, and package type. The primary difference is product status (Active versus Obsolete) and improved RoHS compliance.

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

A: Both are Active, ROHS3-compliant alternatives. LP3883ES-1.5/NOPB offers improved performance with lower dropout voltage (0.42V versus 0.5V) and reduced supply current (8 mA versus 40 mA). Electrical functionality and package type remain equivalent.

Q: Are all three parts in the same package?

A: Yes. All three parts use the TO-263 (DDPAK-5) surface mount package with identical pinout and thermal characteristics.

Q: Which substitute should be selected for new production?

A: LP38843S-1.5/NOPB is recommended as the primary choice due to specification parity with the original part. LP3883ES-1.5/NOPB is suitable when improved efficiency and lower power dissipation are design priorities.

Q: Are there any compliance differences between the substitutes?

A: The obsolete LP38843S-1.5 is RoHS non-compliant. Both active substitutes (LP38843S-1.5/NOPB and LP3883ES-1.5/NOPB) are ROHS3 compliant, meeting current regulatory requirements for new designs.