LP38856T-1.2 Equivalent & Substitute Parts

Part Overview

The LP38856T-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 part integrates protection features including over-current, over-temperature, short-circuit, and under-voltage lockout (UVLO) protection, making it suitable for regulated power supply applications requiring low-noise, low-dropout performance.

The main part number LP38856T-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

LP38856T-1.2

Texas InstrumentsIn Stock: 1097LP38856T-1.2 Datasheet

Current PartRFQ

LP38856T-1.2/NOPB

Texas InstrumentsIn Stock: 1149LP38856T-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP38856T-1.2 is determined by strict equivalence across the following critical parameters:

• Output voltage specification (1.2V fixed)
• Output current capability (3A minimum)
• Input voltage rating (5.5V maximum)
• Dropout voltage performance (0.45V @ 3A maximum)
• Package type (TO-220-5 Formed Leads)
• Output configuration (Positive Fixed)
• Protection feature set (Over Current, Over Temperature, Short Circuit, UVLO)
• Operating temperature range (-40°C to 125°C)

The substitute part LP38856T-1.2/NOPB meets all electrical and mechanical parameters required for direct substitution. The primary distinction between the main part and its substitute is product status and compliance certification level.

Parameter Comparison

Engineering Selection Recommendations

The LP38856T-1.2/NOPB is the direct substitute for the obsolete LP38856T-1.2. Both parts share identical electrical specifications and mechanical packaging, ensuring pin-for-pin and functional compatibility.

Selection between these parts should be based on the following factors:

• Product Availability: LP38856T-1.2/NOPB carries Active product status with current manufacturing support, whereas LP38856T-1.2 is Obsolete and subject to limited availability.
• Compliance Requirements: LP38856T-1.2/NOPB meets RoHS3 compliance standards. If your application requires RoHS compliance, LP38856T-1.2/NOPB is the appropriate selection.
• Supply Chain Continuity: For new designs or production runs, LP38856T-1.2/NOPB ensures long-term component availability and manufacturing consistency.

Both parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can LP38856T-1.2/NOPB directly replace LP38856T-1.2 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same output voltage (1.2V), output current (3A), dropout voltage (0.45V @ 3A), and TO-220-5 package configuration. No circuit modifications are required.

Q: What is the difference between LP38856T-1.2 and LP38856T-1.2/NOPB?

A: The primary differences are product status and compliance certification. LP38856T-1.2 is Obsolete and RoHS non-compliant. LP38856T-1.2/NOPB is Active and RoHS3 compliant. The "/NOPB" suffix indicates lead-free, halogen-free packaging. Electrical performance and package type are identical.

Q: Why is the main part marked as Obsolete?

A: Obsolete status indicates that Texas Instruments has discontinued active manufacturing and support for LP38856T-1.2. The Active substitute LP38856T-1.2/NOPB provides equivalent functionality with current manufacturing support.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts operate across the same temperature range (-40°C to 125°C), deliver identical PSRR performance (80dB ~ 65dB at 120Hz ~ 1kHz), and provide the same protection features (Over Current, Over Temperature, Short Circuit, UVLO).

Q: What packaging formats are available?

A: LP38856T-1.2 is supplied in Formed Leads configuration. LP38856T-1.2/NOPB is supplied in Tube packaging. Both use the TO-220-5 package type with identical pin assignments and mechanical dimensions.

Q: Does the packaging format affect compatibility?

A: No. The packaging format (Formed Leads vs. Tube) refers only to how the components are supplied and handled during assembly. The physical package type (TO-220-5) and pin configuration remain identical, ensuring full mechanical and electrical compatibility.