TPS79118DBVR

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• TPS79118DBVR Application Field and Working Principle
• Introduction:

  The TPS79118DBVR is a low-dropout (LDO) linear regulator that provides excellent power supply noise reduction and stable voltage regulation. The 3.3 V output voltage device is packaged in the µSOP-8 package and is designed to support a wide range of input supply voltages, from 2.7 to 6.5 V. This device features a low quiescent current, low dropout voltage, low shutdown current, and excellent line and load regulation capability. It offers a variety of protection and control features, including output in-regulation (inrush current and voltage overshoot prevention), output overload protection, and output fault-sensing protection.

• TPS79118DBVR Application Field

  The application field of TPS79118DBVR includes but not limited to USB based power supplies, portable instruments, automotive electronics, home health care, industrial control system, and consumer electronics. It is widely used in smart phones, tablets, battery chargers and other situations need various outputs.

• TPS79118DBVR Working Principle

  The working principle of TPS79118DBVR is based on a single high-side n-channel MOSFET, which serves as the output pass element. A band gap reference sets the output voltage in the normal state. In over current condition, a voltage applied across the MOSFET gate inverse biased the p-channel MOSFET, turning it off and creating a flyback voltage on the output. This flyback voltage forces the MOSFET back to the off state and provides effective protection against output overload.

  In thermal shutdown when the device temperature rises over 130°C, the thermal protection circuit turns off the n-channel MOSFET. This effectively limits the heat dissipation of the output, preventing any external damage to the application system caused by excessive current and temperature rise.

  The TPS79118DBVR also provides short-circuit protection, which monitors the output voltage and will shut down the output if the output voltage exceeds a certain preset value. This feature can help protect the application system from damage due to output overload.

• Conclusion:

  TPS79118DBVR is an excellent example of a low-dropout (LDO) linear regulator. It offers superior noise-reduction properties and provides a variety of protection features, including output overload protection, short-circuit protection, output fault-sensing protection, and thermal shutdown. TPS79118DBVR is an ideal power supply choice for a wide variety of applications, including USB based power supplies, portable instruments, automotive electronics, and consumer electronics.

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