LP3966ES-3.3

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

The LP3966ES-3.3 is a fixed-output low-dropout linear regulator from Texas Instruments, delivering a nominal 3.3V output with a maximum current capacity of 3A. It operates within an input voltage range of +2.5V to +7.0V and utilizes a TO-263 (DDPAK-5) surface-mount package. The device features a typical dropout voltage of 80mV at 300mA and 800mV at full load, ensuring high efficiency under varying conditions. It includes integrated thermal and overcurrent protection, maintaining stable performance across a junction temperature range of -40°C to +125°C.

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

• Provides precise fixed 3.3V regulation suitable for sensitive digital logic and microprocessor power rails
• Delivers high continuous output current up to 3A with ultra-low dropout characteristics
• Incorporates comprehensive protection mechanisms including thermal shutdown and current limiting

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

• Low-voltage microprocessor and DSP core power supplies
• GTL/GTL+/BTL/SSTL bus termination circuits
• SCSI interface power distribution networks

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

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and tolerance specifications. Ensure the procurement channel provides valid traceability for RoHS compliance. Cross-reference the manufacturer part number with the latest datasheet revision history to account for any manufacturing changes or obsolescence notices prior to finalizing component selection.

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

Select this component when a stable 3.3V rail is required with high current capability in a compact surface-mount form factor. The fixed output eliminates external resistor networking, simplifying PCB layout compared to adjustable variants. Consider the thermal dissipation requirements of the TO-263 package based on the expected input-to-output voltage differential and ambient operating conditions.

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

This device belongs to the LP3966 series of fast transient response LDOs designed for demanding portable and embedded applications. The series leverages CMOS technology to achieve low quiescent current independent of load, enhancing battery life in portable systems while maintaining robust line and load regulation performance.

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

Consult the official LP3966 family datasheet for direct pin-compatible alternatives such as the LP3966ESX-ADJ/NOPB for adjustable voltage needs or other fixed voltage variants within the same package.