TPS76425DBVR

The TPS76425DBVR is an advanced, high-efficiency, low-noise CMOS linear voltage regulator. It has a very low dropout voltage and an excellent noise specification of 4 μV RMS over 10 Hz to 10 MHz. The operating input voltage range is 2.5 V to 14 V and the output voltage range is from 0.8 V to 13.2 V. It also provides very low output voltage ripple under +/-2% at full load current of 1A.

Application Field

The TPS76425DBVR is used in a wide variety of applications including PC and Notebook computers, Point-Of-Load (POL) DC/DC regulators, systems ROM and SRAM programming, heavy load applications such as embedded control systems, power management, and audio/visual systems. It is widely used in many applications in automotive but can also be used in other industrial applications.

Working Principle

The TPS76425DBVR works by using a P-channel power MOSFET as a pass transistor to regulate the output voltage. When the output voltage increases, an internal voltage divider circuit will reduce the gate voltage of the power MOSFET. This in turn reduces the current flowing through the power MOSFET, helping maintain the desired output voltage. When the output voltage decreases, the voltage divider circuit increases the gate voltage, allowing more current to flow through the power MOSFET, again maintaining the desired output voltage.

The TPS76425DBVR also uses a patented Ripple Rejection Modulation (RRM) technique to reduce output voltage noise. This technique uses an internal comparison circuit to detect any voltage noise on the output voltage and then modulates the input voltage to compensate for this noise. This helps to ensure a clean output voltage.

The TPS76425DBVR also provides short-circuit protection and over-temperature protection. The short-circuit protection circuit will limit the output current to a safe level if a short circuit is detected. The over-temperature protection circuit will shut down the device if it becomes too hot. This helps to protect the device from thermal damage and ensures a long operating life.

Conclusion

The TPS76425DBVR is a low noise, high efficiency, CMOS linear voltage regulator with a wide input voltage range and excellent noise performance. It is used in a variety of applications including PC and Notebook computers, Point-of-Load (POL) DC/DC regulators, systems ROM and SRAM programming, heavy load applications such as embedded control systems, power management, and audio/visual systems. It works by using a P-channel power MOSFET as a pass transistor to regulate the output voltage. It also uses a patented Ripple Rejection Modulation (RRM) technique to reduce voltage noise and provide short-circuit and over-temperature protection.