NCV3163MNR2G

Introduction

The NCV3163MNR2G is a synchronous-rectification step-down DC-DC buck regulator, consisting of an adjustable voltage regulator integrated with an N-Channel MOSFET, which makes it ideal to support a wide variety of applications. It possesses fast transient responses, low power dissipation, high efficiency, and excellent stability in both small-signal and large signal operation. Primarily billed as an automotive and industrial regulator, this device is applicable for a wide range of applications, from communication and computing, to consumer electronics and automotive charging/discharging systems.

ApplicationFields

The NCV3163MNR2G is primarily billed for automotive and industrial applications. Its high power density, low power loss and small package size makes it useful for automotive charging/discharging systems, automotive regulators, and automotive motor control systems. Its excellent stability in both small-signal and large-signal operation make it suitable for industrial control applications such as motor, lighting systems, and industrial communications. This device also serves as a consumer electronic regulator, ideal for consumer electronic applications such as AV receivers, TVs and set-top boxes, and consumer telecommunication/networking equipment.

WorkingPrinciple

The working principle of the NCV3163MNR2G consists of two stages that work in tandem to ensure proper voltage regulation. In the first stage, an adjustable current-mode buck regulator helps regulate the desired voltage. In the second stage, a synchronous rectifier takes over to reduce the power loss and improve the overall efficiency. The schematic diagram shown below shows this two stage principle in action.

In the first stage, the output of an adjustable current-mode buck regulator is set to a constant voltage by the loop between the direction pin and the sense pin. This voltage is then fed to the second stage, which is comprised of two N-channel MOSFETs in a synchronous-rectification configuration.

The two MOSFETs operate in a reversed-parallel manner, which in turns means that during the on-time of the current-mode buck regulator, both of the MOSFETs will conduct and the voltage on the drain node will be equal to the voltage on the source node. Similarly, during the off-time of the current-mode buck regulator, both of the MOSFETs will be diode-connected, effectively allowing the drain node to be equal to the source node.

The advantage of this synchronous-rectification configuration is that it will reduce the power losses and improve the overall efficiency of the regulator. This is because the finite resistance of the body diode is eliminated, resulting in a much shorter turn-on/turn-off times and better power efficiency.

Conclusion

The NCV3163MNR2G is a synchronous-rectification step-down DC-DC buck regulator, ideal for a wide range of applications such as automotive charging systems, industrial control systems, and consumer electronics. Its adjustable current-mode buck regulator and synchronous rectifier combination make the device fast, efficient, and more suitable for low-power applications. Its small size and high power efficiency make it ideal for automotive and industrial applications.