Texas Instruments

TPS79428DGNR

TPS79428DGNR Description

The TPS79428DGNR is a high-performance linear voltage regulator designed by Texas Instruments, known for its ultralow noise and high power supply rejection ratio (PSRR). This regulator is ideal for applications requiring a stable and clean power supply, such as in sensitive analog circuits, precision instrumentation, and high-fidelity audio systems. The TPS79428DGNR features a fixed output voltage of 2.8V, capable of delivering up to 250mA of output current with a maximum input voltage of 5.5V. It operates efficiently with a low dropout voltage of 0.21V at full load, ensuring minimal power loss and high efficiency even under varying load conditions.

TPS79428DGNR Features

• Ultralow Noise and High PSRR: The TPS79428DGNR boasts an impressive PSRR ranging from 65dB at 100Hz to 40dB at 100kHz, making it suitable for noise-sensitive applications. This high PSRR ensures that the regulator can effectively filter out ripple and noise from the input power supply, providing a clean and stable output voltage.
• Fixed Output Voltage: With a fixed output voltage of 2.8V, the TPS79428DGNR simplifies design and eliminates the need for external resistors to set the output voltage, reducing component count and board space.
• Low Quiescent Current: The regulator operates with a quiescent current of only 220 µA, making it energy-efficient and suitable for battery-powered and low-power applications.
• Protection Features: The TPS79428DGNR includes comprehensive protection features such as over-current protection, over-temperature protection, reverse polarity protection, and under-voltage lockout (UVLO), ensuring reliable operation and protection against various fault conditions.
• Enable Control: The regulator features an enable pin, allowing users to control the regulator's operation and reduce power consumption when the regulator is not in use.
• Surface Mount Packaging: The TPS79428DGNR is available in a surface mount package, facilitating easy integration into modern PCB designs and enabling compact and high-density layouts.

TPS79428DGNR Applications

The TPS79428DGNR is well-suited for a variety of applications where low noise and high PSRR are critical. These applications include:

• Precision Analog Circuits: In precision instrumentation and measurement equipment, the TPS79428DGNR provides a clean power supply, minimizing noise and ensuring accurate measurements.
• High-Fidelity Audio Systems: For audio applications, the regulator's low noise and high PSRR contribute to improved audio quality by reducing unwanted noise and interference.
• Battery-Powered Devices: The low quiescent current and efficient operation make the TPS79428DGNR ideal for battery-powered devices, extending battery life and ensuring reliable performance.
• RF and Wireless Applications: In RF and wireless communication systems, the regulator's ability to filter out noise and maintain a stable output voltage is crucial for optimal performance.

Conclusion of TPS79428DGNR

The TPS79428DGNR from Texas Instruments is a versatile and high-performance linear voltage regulator designed to meet the demands of modern electronics. Its ultralow noise, high PSRR, and comprehensive protection features make it an excellent choice for a wide range of applications, from precision analog circuits to high-fidelity audio systems. The regulator's fixed output voltage and low quiescent current further enhance its appeal, offering designers a reliable and efficient power solution. Whether in sensitive analog applications or battery-powered devices, the TPS79428DGNR stands out as a superior choice, delivering exceptional performance and reliability.