LP38859T-1.2 Equivalent & Substitute Parts

Part Overview

The LP38859T-1.2 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 3A output current at a fixed 1.2V output voltage in a TO-220-5 package configuration. 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 LP38859T-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

LP38859T-1.2

Texas InstrumentsIn Stock: 2082LP38859T-1.2 Datasheet

Current PartRFQ

LP38859T-1.2/NOPB

Texas InstrumentsIn Stock: 896LP38859T-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP38859T-1.2 is determined by the following critical parameters:

• Output voltage specification (1.2V fixed)
• Maximum output current rating (3A minimum)
• Maximum input voltage tolerance (5.5V)
• Voltage dropout characteristics (0.45V @ 3A)
• Package type (TO-220-5 Formed Leads)
• Operating temperature range (-40°C ~ 125°C)
• Protection feature set (Over Current, Over Temperature, Short Circuit, UVLO)

The substitute part LP38859T-1.2/NOPB maintains identical electrical specifications and mechanical packaging, ensuring direct functional equivalence. The primary distinction is product status and compliance certification level.

Parameter Comparison

Engineering Selection Recommendations

LP38859T-1.2/NOPB is the direct substitute for LP38859T-1.2. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications. The substitute part carries active product status with ROHS3 compliance certification, whereas the original part is obsolete and RoHS non-compliant. For new designs or ongoing production requiring regulatory compliance, LP38859T-1.2/NOPB is the appropriate selection. Both parts maintain equivalent performance characteristics across all specified operating parameters and protection features.

Frequently Asked Questions (FAQ)

Q: Can LP38859T-1.2/NOPB be used as a direct replacement for LP38859T-1.2?

A: Yes. Both parts are electrically and mechanically identical. They deliver the same 1.2V fixed output at 3A maximum current, operate across the same -40°C to 125°C temperature range, and are packaged in TO-220-5 Formed Leads. The substitute part is actively manufactured and RoHS3 compliant.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" designation indicates lead-free plating and RoHS3 compliance. This reflects current manufacturing standards and regulatory requirements for electronic components.

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

A: No. Both parts use identical TO-220-5 Formed Leads packaging with the same pinout configuration and through-hole mounting type.

Q: What protection features are included in this regulator?

A: The LP38859T-1.2 and LP38859T-1.2/NOPB include over-current protection, over-temperature protection, short-circuit protection, and under-voltage lockout (UVLO).

Q: What is the maximum input voltage for this regulator?

A: The maximum input voltage is 5.5V for both the main part and substitute.

Q: What is the dropout voltage specification?

A: The maximum dropout voltage is 0.45V when delivering the full 3A output current.