TPS71709DSETG4

TPS71709DSETG4 Application Field and Working Principle

The TPS71709DSETG4 is a low-voltage linear regulator device from Texas Instruments. Being a 3-terminal positive fixed voltage regulator, the TPS71709DSETG4 is capable of supplying high-current outputs up to 500mA with output voltages of 1.8V, 2.5V, 3.3V, and 5.0V. This device features a very low output noise of 40-90uVrms and delivers a low dropout voltage at 2.5V and 5.0V.

The TPS71709DSETG4 is well suited for a wide range of applications such as server, storage, network, and other systems that require high-performance power solutions. This device possesses excellent load and line regulation as well as fast transient response with a fast recovering foldback current capability. Thanks to its low output noise and tight voltage regulation, the TPS71709DSETG4 is also suitable for noisier applications.

Working Principle

The working principle of a three-terminal positive fixed voltage regulator such as the TPS71709DSETG4 is straightforward. It is mainly used to ensure that the output voltage of a power supply remains constant regardless of changes in the load, temperature, or other parameters. This is achieved by using a regular feedback control mechanism.

The feedback inside the device is measured by a voltage reference. This reference is connected to the output voltage, which is then compared with a reference voltage. If the measured output voltage drops below the reference voltage, the device will turn on the error amplifier, driving the output voltage back up to the reference voltage. With no changes in the load, temperature, or other parameters, the device will keep maintaining the output voltage at the reference voltage.

The TPS71709DSETG4 also features an adjustable output voltage which can be changed through programming the EN/SET pin. This is a useful feature for applications where the output voltage needs to be adjusted to a specific voltage for optimal performance.

Conclusion

The TPS71709DSETG4 offers an excellent solution for high-performance, low-voltage systems. This three-terminal positive fixed voltage regulator is capable of supplying high-current outputs with very low output noise and delivers a low dropout voltage at all voltage levels. The device also possesses excellent load and line regulation as well as fast transient response and fast recovering foldback current capability, making it well suited for a wide range of applications.

The adjustable output voltage of the TPS71709DSETG4 is also a useful feature and makes it easy to customize the device for specific applications. With these features, the TPS71709DSETG4 is an ideal choice for noisier applications and systems requiring high-performance power solutions.