LP3882ES-1.2 Equivalent & Substitute Parts

Part Overview

The LP3882ES-1.2 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive output of 1.2V at 1.5A in a TO-263 (DDPAK-5) surface mount package. The device is currently listed as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning. This reference provides direct equivalents and parametric substitutes that maintain functional compatibility within the specified electrical and mechanical constraints.

Substiute Parts

LP3882ES-1.2

Texas InstrumentsIn Stock: 1440LP3882ES-1.2 Datasheet

Current PartRFQ

LP38842S-1.2/NOPB

Texas InstrumentsIn Stock: 1304LP38842S-1.2/NOPB Datasheet

Parametric EquivalentRFQ

LP3892ES-1.2/NOPB

National SemiconductorIn Stock: 1185LP3892ES-1.2/NOPB Datasheet

Parametric EquivalentRFQ

LP3882ES-1.2/NOPB

Texas InstrumentsIn Stock: 1395LP3882ES-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP3882ES-1.2 is determined by the following critical parameters:

• Output Voltage (Fixed): 1.2V (exact match required)
• Output Current: 1.5A (exact match required)
• Input Voltage (Max): 5.5V (exact match required)
• Package / Case: TO-263-6, D2PAK (5 Leads + Tab) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -40°C to 125°C (exact match required)
• Protection Features: Over Current, Over Temperature, Short Circuit (exact match required)

Substitute parts are classified into two categories:

Direct Manufacturer Equivalent: Parts with identical electrical specifications and the same base product number from the original manufacturer, differing only in packaging format or compliance status.

Parametric Equivalent: Parts from the same or alternative manufacturers that meet all critical electrical and mechanical parameters, though minor variations in secondary specifications (such as voltage dropout or quiescent current) may exist within acceptable tolerances.

Parameter Comparison

Engineering Selection Recommendations

LP3882ES-1.2/NOPB (Direct Manufacturer Equivalent - Recommended Primary Substitute)

This part is the direct equivalent from Texas Instruments with active product status. It maintains identical electrical specifications to the obsolete LP3882ES-1.2, including voltage dropout of 0.32V @ 1.5A and supply current of 8 mA. The primary distinction is ROHS3 compliance and tube packaging format. This part is the preferred choice for direct replacement in new designs and production continuity.

LP38842S-1.2/NOPB (Parametric Equivalent - Secondary Option)

This Texas Instruments part meets all critical electrical and mechanical parameters with active product status and ROHS3 compliance. The voltage dropout is marginally improved at 0.315V @ 1.5A. However, the maximum supply current is specified at 40 mA compared to 8 mA in the original part. This difference may impact power consumption in applications with strict quiescent current budgets. Tube packaging is provided.

LP3892ES-1.2/NOPB (Parametric Equivalent - Alternative Option)

This National Semiconductor part maintains all critical output specifications and operating temperature range. The voltage dropout is higher at 0.50V @ 1.5A, which may affect thermal performance and efficiency in applications operating at maximum current. Quiescent current and supply current specifications match the original part. Bulk packaging is provided. This part is suitable for applications where the higher dropout voltage is acceptable.

Frequently Asked Questions (FAQ)

Q: Can LP3882ES-1.2/NOPB be used as a direct replacement for LP3882ES-1.2?

A: Yes. LP3882ES-1.2/NOPB is the direct manufacturer equivalent with identical electrical specifications. The primary differences are active product status, ROHS3 compliance, and tube packaging format instead of bulk. No circuit modifications are required.

Q: What is the significance of the voltage dropout difference between LP38842S-1.2/NOPB (0.315V) and the original part (0.32V)?

A: The 0.005V difference is negligible for most applications. Both values fall within standard engineering tolerances for linear regulators. Selection between these parts should be based on other factors such as product status, compliance requirements, and supply current specifications.

Q: Why does LP38842S-1.2/NOPB have a higher maximum supply current (40 mA vs. 8 mA)?

A: This specification reflects the maximum current the device may draw under worst-case conditions. The higher value in LP38842S-1.2/NOPB does not indicate higher typical quiescent current (both are 30 µA). Applications with strict power budgets should verify this specification against circuit requirements.

Q: Is the LP3892ES-1.2/NOPB suitable for high-current applications?

A: The LP3892ES-1.2/NOPB delivers the same 1.5A output current as the original part. However, the higher voltage dropout of 0.50V @ 1.5A results in greater power dissipation and heat generation compared to alternatives with lower dropout. Thermal design must account for this difference in applications operating at or near maximum current.

Q: Are all substitute parts available in the same TO-263 package?

A: Yes. All substitute parts use the TO-263-6, D2PAK (5 Leads + Tab) package with surface mount mounting type. PCB layout and footprints are compatible across all listed parts.

Q: What is the impact of RoHS compliance on part selection?

A: The original LP3882ES-1.2 is RoHS non-compliant. Both LP3882ES-1.2/NOPB and LP38842S-1.2/NOPB are ROHS3 compliant, meeting current environmental and regulatory requirements for most applications. Selection should align with end-product compliance obligations.

Q: Can these parts be used interchangeably in existing designs?

A: LP3882ES-1.2/NOPB is a direct replacement requiring no design changes. LP38842S-1.2/NOPB and LP3892ES-1.2/NOPB are parametric equivalents suitable for new designs; however, thermal analysis should be performed for applications operating at maximum current due to voltage dropout variations.