Product Overview: TPS79918DDCRG4 from Texas Instruments

The TPS79918DDCRG4 is a highly efficient, low-dropout linear regulator (LDO) capable of delivering a continuous 200mA output current. Manufactured by Texas Instruments, this LDO is designed to provide a stable and reliable power supply for a wide range of applications, including portable consumer electronics, wireless communication devices, and sensors.

Key Features

• Output Voltage: The device provides a fixed output voltage of 1.8V, which is suitable for powering low-voltage digital circuits and microcontrollers.
• High Accuracy: The output voltage is accurate to within 2%, ensuring consistent performance and reliable operation of connected components.
• Low Dropout Voltage: With a low dropout voltage of typically 85mV at full load, the TPS79918DDCRG4 maintains regulation even when the input voltage is close to the output voltage, maximizing battery life in portable applications.
• Power Supply Rejection Ratio (PSRR): The device offers excellent ripple rejection, with a PSRR of 70dB at 1kHz, which helps to minimize noise and fluctuations in the output voltage.
• Low Quiescent Current: The TPS79918DDCRG4 features a very low quiescent current of typically 40µA, making it ideal for battery-powered devices where power conservation is crucial.
• Thermal and Overcurrent Protection: The device includes built-in thermal shutdown and overcurrent protection features, safeguarding the LDO and connected components from damage due to excessive heat or current.

Package and Reliability

The TPS79918DDCRG4 comes in a compact SOT-23-5 package, which is designed for surface-mount technology (SMT), allowing for efficient use of PCB space. This LDO is characterized for operation from –40°C to 125°C, ensuring reliable performance across a wide range of temperatures.

Applications

With its combination of low dropout voltage, high PSRR, and low quiescent current, the TPS79918DDCRG4 is well-suited for a variety of applications, including:

• Portable and battery-powered devices
• Wireless communication systems
• Power supplies for DSPs and microcontrollers
• Analog and digital sensor systems
• Medical devices