Texas Instruments

LP3891ET-1.2/NOPB

LP3891ET-1.2/NOPB Description

The LP3891ET-1.2/NOPB is a fixed-output linear regulator designed for applications requiring a stable 1.2V output voltage and up to 800mA of output current. Manufactured by Texas Instruments, this regulator is housed in a TO220-5 through-hole package, making it suitable for a variety of power management applications. Despite its obsolete status, the LP3891ET-1.2/NOPB remains a reliable choice for engineers seeking a robust linear regulator with a low dropout voltage and comprehensive protection features.

LP3891ET-1.2/NOPB Features

• Output Type: Fixed, providing a stable 1.2V output voltage.
• Input Voltage Range: Operates efficiently within a maximum input voltage of 5.5V.
• Output Current: Delivers up to 800mA of output current, making it suitable for demanding applications.
• Low Dropout Voltage: Features a maximum dropout voltage of 0.4V at 800mA, ensuring high efficiency even at low input-to-output voltage differentials.
• Quiescent Current: Maintains a low quiescent current of 30 µA, contributing to overall system efficiency.
• Power Supply Current: Requires a maximum supply current of 8 mA, minimizing power consumption.
• Protection Features: Includes over-current, over-temperature, short-circuit, and under-voltage lockout (UVLO) protections, safeguarding the regulator and downstream components.
• Control Features: Equipped with an enable function, allowing for dynamic control of the regulator's operation.
• Noise Performance: Offers a high power supply rejection ratio (PSRR) of 80dB to 65dB across the frequency range of 120Hz to 1kHz, ensuring clean output voltage.
• Compliance: Compliant with REACH and ROHS3 standards, ensuring environmental and safety considerations are met.
• Moisture Sensitivity Level: MSL 1 (Unlimited), suitable for a wide range of manufacturing environments.

LP3891ET-1.2/NOPB Applications

The LP3891ET-1.2/NOPB is ideal for a variety of applications where a stable and efficient power supply is critical. Its low dropout voltage and comprehensive protection features make it suitable for:

• Embedded Systems: Providing a stable power supply for microcontrollers and other low-voltage components.
• Industrial Equipment: Ensuring reliable operation in demanding industrial environments.
• Telecommunications: Supplying power to sensitive communication circuits.
• Consumer Electronics: Powering devices that require a stable and efficient power source.
• Automotive Applications: Suitable for automotive electronics where reliability and efficiency are paramount.

Conclusion of LP3891ET-1.2/NOPB

The LP3891ET-1.2/NOPB is a robust and reliable linear regulator that offers a stable 1.2V output with up to 800mA of current. Its low dropout voltage, comprehensive protection features, and low quiescent current make it an excellent choice for a wide range of applications. Despite its obsolete status, the LP3891ET-1.2/NOPB remains a viable option for engineers seeking a proven and efficient power management solution. Its compliance with industry standards and robust design ensure it continues to meet the needs of modern electronic systems.