CDLL4917

Diodes - Zener - Single

Linear Technology\'s CDLL4917 is a low dropout (LDO) regulator specifically designed for noise sensitive applications.

A Zener diode, which is an important component in many electronic circuits, functions as a voltage regulator. The Zener diode works as an element of a voltage regulator circuit, allowing the voltage across the diode to remain constant. This is accomplished by a breakdown voltage. When the voltage exceeds the breakdown voltage, the device starts to conduct current and the voltage across the diode remains constant.

Application Field

The CDLL4917 LDO regulator is specially designed to meet low noise and high accuracy requirements, especially for analog and RF front end applications. It includes specific features such as a current limiting, reverse current protection and thermal shutdown, enabling it to operate in a wide range of applications. It accepts a 2.2V to 11V input voltage and provides a regulated output voltage of 0.8V to 5V with a maximum output current of 800mA.

The CDLL4917 features low dropout voltage and low noise for clean, low distortion audio and powering low-noise analog and RF circuits. It can be used for audio, instrumentation, automotive and other sensitive analog and RF applications where noise and accuracy are essential.

Working Principle

The CDLL4917 consists of an internal P-MOSFET power device as the main regulator, combined with an internal current limiter and low-dropout voltage reference. The current limiter is designed with a constant voltage drop of 0.75V, and has active circuit that prevents an output current greater than the preset current limit of 800mA.

The low dropout voltage reference (VOUT) provides a low output voltage tolerance of ±1.5%, and the regulator is designed to maintain a minimum load current in standby mode.

The device has no external components, making it quick and easy to design with, and it is protected from short circuit and over temperature conditions. The device is designed for low power consumption and is fully protected with reverse current and over temperature protection.

Conclusion

The special features and low-noise of the CDLL4917 make it suitable for many noise sensitive applications. Its features provide a stable and clean output with a current limit of 800mA, enabling low-noise, high accuracy power solutions.