LP38858S-1.2 Equivalent & Substitute Parts

Part Overview

The LP38858S-1.2 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 1.5A output current at a fixed 1.2V output with a maximum dropout voltage of 0.18V at full load. The device integrates soft start control and comprehensive protection features including over-current, over-temperature, short-circuit, and under-voltage lockout protection.

The main part number LP38858S-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 status and current compliance certifications.

Substiute Parts

LP38858S-1.2

Texas InstrumentsIn Stock: 1466LP38858S-1.2 Datasheet

Current PartRFQ

LP38858S-1.2/NOPB

Texas InstrumentsIn Stock: 901LP38858S-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP38858S-1.2 is determined by strict equivalence across the following critical parameters:

• Output voltage specification (1.2V fixed)
• Maximum output current capability (1.5A)
• Input voltage rating (5.5V maximum)
• Dropout voltage performance (0.18V @ 1.5A)
• Package type (TO-263 DDPAK-5)
• Mounting configuration (Surface Mount)
• Protection and control feature set (soft start, over-current, over-temperature, short-circuit, UVLO)

The substitute part LP38858S-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

LP38858S-1.2/NOPB is the direct substitute for LP38858S-1.2. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications. The substitute part carries active product status and ROHS3 compliance certification, whereas the main part number is obsolete and RoHS non-compliant.

For new designs or production continuity, LP38858S-1.2/NOPB is the appropriate selection. The part maintains full functional and physical compatibility while providing access to current manufacturing and compliance standards.

Frequently Asked Questions (FAQ)

Q: Can LP38858S-1.2/NOPB be used as a direct replacement for LP38858S-1.2?

A: Yes. Both parts are electrically and mechanically identical. They share the same output voltage (1.2V fixed), output current (1.5A), dropout voltage (0.18V @ 1.5A), protection features, and TO-263 DDPAK-5 package configuration. Pin-for-pin and functional compatibility is complete.

Q: What is the difference between LP38858S-1.2 and LP38858S-1.2/NOPB?

A: The primary differences are product status and compliance certification. LP38858S-1.2 is obsolete and RoHS non-compliant. LP38858S-1.2/NOPB is active and ROHS3 compliant. The "/NOPB" suffix indicates lead-free plating. All electrical and thermal specifications are identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the TO-263-6 package (D2PAK with 5 leads plus tab, also designated TO-263BA). Pinout, lead spacing, and mechanical dimensions are identical.

Q: What is the MSL rating for these parts?

A: Both LP38858S-1.2 and LP38858S-1.2/NOPB carry MSL 3 with a floor life of 168 hours. Standard moisture control procedures apply during storage and handling.

Q: Can these parts be used in applications requiring RoHS compliance?

A: LP38858S-1.2/NOPB is ROHS3 compliant and suitable for RoHS-regulated applications. LP38858S-1.2 is RoHS non-compliant and should not be used in applications with RoHS requirements.