Texas Instruments

LM1117LDX-1.8

LM1117LDX-1.8 Description

The LM1117LDX-1.8 is a fixed linear-output regulator designed to provide a stable 1.8V output voltage with a maximum output current of 800mA. Manufactured by Texas Instruments, this regulator is part of the Power Management Integrated Circuits (PMIC) category and is housed in an 8-lead WSON package suitable for surface-mount applications. Despite being marked as obsolete, the LM1117LDX-1.8 remains a reliable choice for applications requiring a low dropout voltage and high efficiency.

LM1117LDX-1.8 Features

• Output Type: Fixed at 1.8V, ensuring consistent power delivery.
• Input Voltage Range: Capable of handling input voltages up to 15V, providing flexibility in power source selection.
• Output Current: Delivers up to 800mA, suitable for a wide range of low-power applications.
• Low Dropout Voltage: With a maximum dropout voltage of 1.2V at 800mA, the LM1117LDX-1.8 maintains high efficiency even at low input-to-output voltage differentials.
• Protection Features: Over-current and over-temperature protection ensure robustness and reliability in various operating conditions.
• Operating Temperature: Functions reliably within a temperature range of 0°C to 125°C, making it suitable for industrial and automotive applications.
• Low Quiescent Current: At 5mA, the quiescent current is minimized, enhancing overall system efficiency.
• High PSRR: A power supply rejection ratio of 75dB at 120Hz ensures minimal noise and ripple on the output voltage.
• Moisture Sensitivity Level: MSL 1 (Unlimited) indicates that the device is not sensitive to moisture, facilitating easier handling and assembly processes.

LM1117LDX-1.8 Applications

The LM1117LDX-1.8 is ideal for applications a requiring stable and efficient power supply with a fixed output voltage. Specific use cases include:

• Consumer Electronics: Powering low-voltage microcontrollers, sensors, and other small electronic devices.
• Industrial Equipment: Providing stable power to control systems, instrumentation, and other critical components.
• Automotive Electronics: Suitable for in-vehicle systems where a reliable and efficient power source is essential.
• Telecommunications: Powering low-voltage circuitry in base stations and other communication equipment.

Conclusion of LM1117LDX-1.8

The LM1117LDX-1.8 is a robust and efficient linear regulator that offers a stable 1.8V output with a maximum current of 800mA. Its low dropout voltage, high PSRR, and built-in protection features make it a reliable choice for a variety of applications. Despite being marked as obsolete, the LM1117LDX-1.8 remains a viable option for designers seeking a fixed-output regulator with excellent performance characteristics. Its compatibility with surface-mount technology and wide operating temperature range further enhance its appeal in demanding industrial and automotive environments.