LP3966ESX-1.8/NOPB

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LP3966ESX-1.8/NOPB is a 3-A high-accuracy low-dropout voltage regulator from Texas Instruments, housed in a TO-263 (KTT) package with five pins. It provides a fixed 1.8 V output and operates within an input voltage range up to 7 V. The device features a typical quiescent current of 5 mA and delivers a dropout voltage of 0.1 V at 300 mA, rising to 1 V at full load. It includes power good and enable functions, with protection against overcurrent, overtemperature, and short circuits. Operating temperatures span from -40°C to +125°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated power good signal and enable control for system management
• High accuracy regulation with low noise performance
• Comprehensive protection including overcurrent, thermal, and short-circuit safeguards

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems needing extended runtime
• Embedded applications with strict space constraints

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the complete part number LP3966ESX-1.8/NOPB matches your design requirements before ordering. Confirm that the TO-263 package footprint aligns with your PCB layout. Ensure the fixed 1.8 V output meets your circuit needs, as this variant does not support adjustable settings. Check for RoHS compliance status if required by your manufacturing standards.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 1.8 V rail is needed with up to 3 A load capability. Consider the TO-263 package for its thermal performance compared to smaller packages. Evaluate the 5 mA quiescent current against battery life requirements. Compare dropout characteristics at specific load currents to ensure sufficient headroom from the input supply voltage.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the LP3966 series of fast ultra-low dropout linear regulators. The series offers various output voltages and packages, including adjustable versions like the LP3966ESX-ADJ/NOPB. The ESX suffix indicates the TO-263 package type, while NOPB denotes lead-free and RoHS-compliant construction. The 1.8 V fixed output distinguishes it from other variants in the family.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include other LP3966 variants with compatible packages and electrical characteristics. Verify pin compatibility and thermal performance when swapping between different output voltage options within the same series.