LP3965EMP-1.8

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

The LP3965EMP-1.8 is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, delivering a stable 1.8 V output with a maximum load current of 1.5 A. Housed in a surface-mount SOT-223-5 package, it operates within an input voltage range up to 7 V and maintains a typical dropout voltage of 380 mV at full load. The device features a low quiescent current of 15 µA and provides high power supply rejection ratio (PSRR) performance of 60 dB. It includes integrated protection mechanisms against overcurrent, thermal overload, and short circuits, functioning reliably across an extended temperature range from -40 °C to +125 °C.

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

• Provides fast transient response capabilities for dynamic load conditions
• Integrates comprehensive protection including overcurrent, thermal shutdown, and reverse battery protection
• Delivers high power supply rejection ratio to minimize noise sensitivity

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

• Portable consumer electronics requiring efficient power management
• Battery-powered systems needing extended operational life
• Embedded control circuits in industrial equipment

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

Verify the complete part number suffix, specifically the /NOPB designation, to ensure compliance with RoHS standards and confirm lead-free manufacturing status. Confirm that the SOT-223-5 package variant matches your PCB footprint requirements. Cross-reference the specific output voltage code to ensure the 1.8 V fixed version is selected rather than adjustable or other voltage variants within the LP3965 family.

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

Select this component when a fixed 1.8 V rail is required with high current capability up to 1.5 A. Ensure the input voltage remains above the minimum threshold while accounting for the specified dropout voltage under maximum load. Consider the thermal dissipation characteristics inherent to the SOT-223-5 package for proper heat sinking design in enclosed environments.

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

This device belongs to the LP3965 series of ultra-low dropout regulators designed for high-performance applications. It shares architectural similarities with other members like the LP3961 but offers higher current capacity. The series is characterized by its ability to operate with minimal input-to-output voltage differential, making it suitable for battery-powered devices where maximizing energy efficiency is critical.

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

LP3965EMP-1.8/NOPB serves as the direct RoHS-compliant equivalent.