REG1117A-2.5

The REG1117A-2.5 is a low-dropout voltage regulator applicable to a variety of fields. In particular, it is suitable for portable electronics, including mobile phones, personal digital assistants and handheld computers. This linear voltage regulator has many applications, and its working principles deserve further consideration.

Input Voltage Range

The REG1117A-2.5 is available in an adjustable output voltage ranging from 1.25V to 8V, making it suitable for a range of power supply systems. Its input voltage range is 2.6V to 17V and it has a maximum output current of 400mA. This regulator also has excellent thermal performance, with a typical thermal resistance of 5°C/W.

Power-up Sequencing

The REG1117A-2.5 offers power-up sequencing, allowing multiple REG1117A-2.5s to be connected together in series to create multiple output supplies. The power-up sequence of the REG1117A-2.5 is generally fixed, where an enable pin can be used to turn on and off the output voltage. Power-up sequencing is often used to start up peripherals and accessory devices in the correct order.

Thermal Shutdown

The REG1117A-2.5 is equipped with a thermal shutdown feature, ensuring the regulator will not be damaged if the operating temperature rises too high. When the temperature exceeds the rated thermal limit, the chip will shut down the output voltage, protecting the device from thermal runaway. This feature provides excellent protection to the application, extending its lifetime performance.

Ripple Rejection

The REG1117A-2.5 is rated for 78dB Ripple Rejection at 20kHz, making it perfect for high-frequency applications such as clock and data communications. As the frequency increases, the ripple rejection increases, making the REG1117A-2.5 perfect for high-frequency switching and RF applications.

Load Transient Response

The REG1117A-2.5 also has excellent load transient response, making it suitable for systems with rapidly changing loads. The regulator can quickly adjust the output voltage to meet the new load requirements, keeping the output voltage at the desired value regardless of the load changes. This feature makes it perfect for portable systems with unpredictable loads.

Conclusion

The REG1117A-2.5 is well-suited for various applications, thanks to its wide operating voltage range, power-up sequencing, thermal shutdown, ripple rejection and load transient response. Its ability to maintain a stable output even under changing loads makes it perfect for high-frequency switching applications. All these features make the REG1117A-2.5 an ideal candidate for a wide variety of applications.