NCP81128MNTXG

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The NCP81128MNTXG is a versatile 3A DC-DC synchronous step-down power regulator that is optimized for a wide range of load conditions. It is a high-efficiency, high-current, integrated dual-channel synchronous buck power switch with spread spectrum capability and a wide range of voltage output options. The NCP81128MNTXG also provides several advanced features, including over-current protection, over-temperature protection, and under-voltage protection.

The NCP81128MNTXG is ideally suited for industrial and consumer applications where a small form factor, low power consumption, and high efficiency are desired. It is highly versatile, allowing for a wide range of input and output voltages, switch-mode frequencies, and control topologies to match application requirements.

Application Field

The NCP81128MNTXG is designed to meet the needs of the industrial, wired and wireless communications, peripherals, consumer, and mobile computing markets. It is ideal for a wide range of applications, including cell phones, notebooks, palmtops, and other portable devices, as well as non-portable electronic products such as server-class systems.

The device can operate in either forced-PWM or forced-PFM mode at a nominal output of 5V, 3.3V, 2.5V, 1.8V, and other output voltages, depending on the user’s application requirements. It supports both synchronous and asynchronous operations and can be used to implement the most common control topology, including buck, boost, buck-boost, and flyback.

Working Principle

The NCP81128MNTXG is a dual-channel synchronous buck converter, with two integrated power MOSFETs and a current sense amplifier. The device\'s control logic provides a fixed frequency, open loop, current mode control. The MOSFETs are designed to achieve maximum efficiency while the control loop ensures accurate and reliable voltage regulation.

At start-up, the NCP81128MNTXG automatically sets the switching frequency. During normal operation, the converter adjusts its switching frequency based on the current load, allowing the device to maintain high efficiency under various loading conditions. The device also incorporates all of the necessary protection circuits, including over-current, over-temperature, and under-voltage protection.

The NCP81128MNTXG is designed to be a cost-effective solution for high-performance switching power supply designs. It is available in a 6-pin WSON package, offering designers a compact and efficient solution for their power conversion needs.

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