NCP81118MNTXG

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The NCP81118MNTXG is a highly-integrated buck controller, optimized for point-of-load (POL) dc-dc conversion. It is specifically designed to provide the highest level of efficiency and reduce the overall size of the power system by allowing a single buck building block to be used to regulate a wide variety of point-of-load (POL) applications. The NCP81118MNTXG can be used to regulate outputs from 0.6V to 5.5V and has several features that make it well-suited for these applications.

Application Field

The NCP81118MNTXG buck controller can be used for various applications such as mobile phones, tablets and other modern consumer electronics products. It is suitable for the point-of-load (POL) dc-dc conversion, allowing a single buck building block to be used to regulate a wide variety of point-of-load (POL) applications. The NCP81118MNTXG have a low quiescent current and it is capable of supplying up to 6 A of output current.

The NCP81118MNTXG is specifically designed for use in space-constrained applications such as tablet PC, mobile phone and power card applications. It also offers an integrated power-stage solution with its own switching device, and an external voltage divider for accurate output current sensing. Due to its superior performance, it is widely used in portable and mobile communication systems, laptop PCs, GPS and navigation applications, industrial and automotive applications, consumer applications and industrial electronics.

Working Principle

The NCP81118MNTXG buck controller employs a synchronous rectification technique and is modern digital current-mode control. It incorporates low-dropout voltage regulator (LDO) mode, allowing stable operation over wide supply and output voltages. It also employs both high-side and low-side MOSFETs, enabling high efficiency and clean switching.

The controller monitors both the supply and output voltages and provides information regarding their status to the digital core of the controller. Based on the status of these two voltages, the controller sets the output current, regulates the output voltage and monitors the power-stage current.

The controller also features a programmable switching frequency as well as a wide range of pulse-width-modulation (PWM) control options. It also contains several safety features, including over-temperature protection, over-current protection, and short-circuit protection.

The output voltage of the controller is regulated by an internal voltage reference, which enables it to operate with a wide range of input and output voltages. It is also equipped with an adjustable overcurrent limit, allowing the user to maintain a steady output current and prevent overloading.

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