LP38859S-1.2 Equivalent & Substitute Parts

Part Overview

The LP38859S-1.2 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 3A output current at a fixed 1.2V output with a maximum dropout voltage of 0.45V at full load. The regulator integrates soft start control and comprehensive protection features including over-current, over-temperature, short-circuit, and under-voltage lockout protection.

The main part number LP38859S-1.2 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LP38859S-1.2

Texas InstrumentsIn Stock: 2046LP38859S-1.2 Datasheet

Current PartRFQ

LP38859S-1.2/NOPB

Texas InstrumentsIn Stock: 1347LP38859S-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP38859S-1.2 is determined by strict equivalence across the following critical parameters:

• Output voltage specification (1.2V fixed)
• Maximum output current capability (3A)
• Maximum input voltage rating (5.5V)
• Dropout voltage performance (0.45V @ 3A)
• Package type (TO-263 DDPAK-5)
• Protection feature set (Over Current, Over Temperature, Short Circuit, UVLO)
• Control features (Soft Start)
• Operating temperature range (-40°C ~ 125°C)

The substitute part LP38859S-1.2/NOPB maintains identical electrical specifications and mechanical compatibility with the main part number. The primary distinction is product status and compliance certification level.

Parameter Comparison

Engineering Selection Recommendations

The LP38859S-1.2/NOPB is the direct substitute for the obsolete LP38859S-1.2. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications. The substitute part carries active product status, ensuring ongoing manufacturing support and availability.

The LP38859S-1.2/NOPB holds ROHS3 compliance certification, whereas the original part is RoHS non-compliant. For applications subject to RoHS regulatory requirements or industry standards mandating lead-free component usage, the LP38859S-1.2/NOPB is the appropriate selection. The substitute part is also REACH Affected, indicating compliance with REACH chemical substance regulations.

Both parts are packaged in TO-263 (DDPAK-5) surface-mount configuration and are electrically and mechanically interchangeable. No circuit redesign or PCB layout modification is required when transitioning from LP38859S-1.2 to LP38859S-1.2/NOPB.

Frequently Asked Questions (FAQ)

Q: Can LP38859S-1.2/NOPB be used as a direct replacement for LP38859S-1.2?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, output voltage (1.2V fixed), output current (3A), dropout voltage (0.45V @ 3A), and package type (TO-263 DDPAK-5). No circuit modifications are required.

Q: What is the difference between LP38859S-1.2 and LP38859S-1.2/NOPB?

A: The primary differences are product status and compliance certifications. LP38859S-1.2 is obsolete and RoHS non-compliant. LP38859S-1.2/NOPB is active and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Is the LP38859S-1.2/NOPB suitable for RoHS-regulated applications?

A: Yes. The LP38859S-1.2/NOPB carries ROHS3 compliance certification and is suitable for applications subject to RoHS directives and lead-free component requirements.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the TO-263 (DDPAK-5) surface-mount package with identical pinout and mechanical dimensions. PCB footprints are compatible without modification.

Q: What is the current availability status of each part?

A: LP38859S-1.2 is obsolete with limited remaining inventory. LP38859S-1.2/NOPB is active with ongoing manufacturing support and current inventory availability.