LM1086ISX-ADJ/NOPB

Overview

The LM1086ISX-ADJ/NOPB is a positive low-dropout linear regulator manufactured by Texas Instruments. It provides an adjustable output voltage ranging from 1.25 V to 27.5 V with a maximum continuous output current of 1.5 A. The device utilizes the D2PAK-3 (TO-263-3) surface-mount package and supports an operating temperature range from -40 °C to +125 °C. Key electrical specifications include a typical dropout voltage of 1.3 V at full load, a maximum input voltage of 30 V, and a minimum input voltage of 2.6 V.

Feature Summary

• Adjustable output voltage configuration via external resistor network
• Integrated thermal shutdown and safe area protection for robust operation
• Low dropout performance enabling efficient power conversion under varying load conditions

Applications

• Point-of-load regulation in embedded systems
• Battery-powered equipment requiring stable voltage supply
• General-purpose power supplies and distribution networks

Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer documentation. Ensure the ordering part number matches the required TO-263-3 package variant. Confirm that the application circuit includes appropriate output capacitors to maintain stability, as specified in the official datasheet. Cross-reference the manufacturer's latest revision notes for any updates to recommended component values or thermal guidelines before finalizing procurement.

Selection Notes

Select this component when an adjustable positive voltage rail is required with up to 1.5 A capacity. The TO-263-3 package offers a balance between thermal dissipation capabilities and surface-mount assembly convenience. Consider the dropout voltage characteristics relative to the minimum input voltage available in the system. Verify that the thermal management design accommodates the expected power dissipation at the target load current and ambient temperature conditions.

Part Context

This device belongs to the LM1086 family of low-dropout regulators designed for high-current applications. The family includes fixed-output variants such as the LM1086ISX-3.3/NOPB and higher-current counterparts like the LM1084 series. The ISX designation indicates the industrial temperature grade and surface-mount packaging format. This specific model provides flexibility through its adjustable output, distinguishing it from fixed-voltage options within the same product line.

Replacement Considerations

Direct substitutes include other LM1086ISX-ADJ/NOPB units from Texas Instruments. Alternative packages such as the LM1086CT-ADJ/NOPB (TO-220) offer similar electrical performance but require through-hole mounting. Ensure compatibility with existing PCB footprints if considering package variations.