LM1086IT-2.85/NOPB

Overview

The LM1086IT-2.85/NOPB is a fixed positive low dropout linear regulator manufactured by Texas Instruments, which acquired National Semiconductor. It provides a fixed output voltage of 2.85 V with a maximum load current capability of 1.5 A. The device features a typical dropout voltage of 1.3 V at full load and supports an input voltage range up to 27 V. It incorporates internal thermal shutdown and current limiting protection mechanisms.

Feature Summary

• Fixed 2.85 V output voltage configuration
• Integrated thermal shutdown and current limiting protection
• Low dropout operation for efficient power management

Applications

• Battery-powered systems requiring stable voltage regulation
• Post-regulation for switching power supplies
• General-purpose linear power supply circuits

Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments now produces this component following its acquisition of National Semiconductor. Confirm the specific suffix 'NOPB' indicates lead-free and halogen-free compliance. Ensure the package type matches the required PCB footprint, typically TO-220 for the IT variant.

Selection Notes

Select this component when a precise 2.85 V rail is required from a higher input voltage source. It is suitable for applications where low noise and simple implementation are prioritized over high efficiency compared to switching regulators. Verify that the input-to-output differential remains within the specified dropout limits under all operating conditions.

Part Context

This part belongs to the LM1086 family of 1.5 A low dropout positive regulators. It shares pinout compatibility with standard adjustable regulators like the LM317 but offers fixed voltage options to simplify circuit design. The family includes various output voltages and package styles to accommodate different thermal and spatial constraints in electronic designs.