NCP4686DSN18T1G

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NCP4686DSN18T1G is a low noise voltage regulator device which provides a highly integrated solution with a high output voltage accuracy and low dropout voltage. This device is a key component in many applications including cellular telephone, handheld device, digital camera, and personal computer peripheral design. It is an essential component of PMIC (Power Management Integrated Circuit) - Voltage Regulators - Linear, used to maintain a constant voltage in a design.

This device features a wide input voltage range from 1.4V to 5.6V, and provides a variable output voltage of up to 3.3V. It is capable of delivering up to 150mA of output current and has low quiescent current with power dissipation of typically 500mW. The device is highly integrated, with just two external components required for full performance.

NCP4686DSN18T1G features an internal voltage reference, feedback voltage divider, and two outputs for tracking. These features allow for very precise adjustment of the output voltage. This device also includes advanced shutdown and protection features such as thermal shutdown, undervoltage lockout, and overcurrent protection.

This device can be used in a wide range of applications including power adapters, mobile phone chargers, POE (Power over Ethernet) converters, motor controls, and embedded industrial control systems. Its special low noise and quiescent current characteristics make it ideal for medical devices and consumer equipment.

The working principle of NCP4686DSN18T1G is based on the current-mode regulation. The output voltage is controlled by an internal voltage reference, which is compared to the feedback voltage from an external voltage divider network. The resulting difference is fed to an internal error amplifier, which then provides the output current necessary to maintain the output voltage. The output current is then regulated by the internal current limit, providing additional protection.

In addition, the device features an external enable pin which is used to quickly enable and disable the device. When enabled, the device operates in normal mode and the output voltage is held at the programmed value. When disabled, the device goes into a low-power sleep mode, reducing power consumption significantly.

By combining the benefits of low noise and high accuracy, NCP4686DSN18T1G is an ideal solution for applications requiring a constant and reliable voltage supply. The highly integrated, space-efficient design, makes this device well suited for applications such as portable electronic devices, IT equipment, and other devices requiring high reliability.

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