NB638DL-LF-Z

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The NB638DL-LF-Z from ON Semiconductor is a DC/DC switching regulator, which is commonly used as a voltage regulator in a variety of applications. This type of regulator is capable of delivering output voltages of up to 5.5V, and is able to operate at a temperature range of -40°C to +85°C.

Features and Benefits

One of the main features of the NB638DL-LF-Z is its low noise and ripple operation. Its switching frequency of 200kHz enables the regulator to maintain a low noise level, while its single-ended PWM architecture ensures good regulation performance. The output voltage of the NB638DL-LF-Z can be programmed accurately, and it is capable of providing an output current of up to 500mA.

The NB638DL-LF-Z is a highly efficient device, with an overall efficiency of up to 94%. In addition, it is also able to protect against short circuits, overvoltage, overcurrent, and undervoltage. The device also offers a wide input voltage range of 5.5V to 36V, making it suitable for a variety of applications.

Application Fields

The NB638DL-LF-Z is most commonly used in portable electronics and computing applications, as it is capable of providing both 12V and 5V supplies with a single device. It is also used in industrial and commercial applications, with applications extending beyond just powering a socketed device. Examples of applications include powering industrial controllers, motor drivers, and point-of-sale systems.

In addition, the NB638DL-LF-Z can be used as a point-of-load supply, which can provide current up to 500mA. This makes it suitable for use in applications such as LED drivers, battery chargers, automotive applications, and DC/DC converters.

Working Principle

The NB638DL-LF-Z is a non-isolated buck (step-down) DC/DC switching regulator. It works by controlling an internal high-frequency switching oscillator, which steps down the input voltage to the desired output voltage. The NB638DL-LF-Z uses a synchronous rectified topology, which results in increased efficiency and low output ripple.

The device operates in two basic modes: continuous conduction mode and discontinuous conduction mode. In continuous conduction mode, the inductor current is continuous, while in discontinuous conduction mode, the inductor current is intermittent. The selection of one mode over the other is determined by the regulating loop, which is constantly monitoring the output voltage, to ensure it remains constant.

Conclusion

The ON Semiconductor NB638DL-LF-Z is a low-noise, high efficiency DC/DC switching regulator, capable of producing output voltages up to 5.5V. It is primarily used in portable electronics and computing applications, but can also be used in industrial and commercial applications. The NB638DL-LF-Z is a synchronous buck DC/DC regulator, operating in either continuous or discontinuous conduction mode, and has a wide input voltage range of 5.5V to 36V.

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