NCP1398BDR2G

NCP1398BDR2G is a high-voltage, synchronous buck regulator with integrated high-side and floating low-side MOSFETs that operate in peak current-mode control. It is part of ON Semiconductor’s Ilowplus+® family of devices that feature an integrated power switch and startup control, saving board space and reducing system costs.

NCP1398BDR2G is designed for off-line power conversion applications, specifically for various BUCK-based solutions up to 16.5V. It is a single-chip solution, with only a handful of external components required for a quick setup and a tailored design, significantly reducing overall board space requirements. It can be used in applications such as lighting control, power supply, and smart home appliances.

The device is capable of delivering up to 5A output current with a switching frequency up to 1MHz. It supports dynamic voltage scaling and soft-start, key EEPROM parameters, and boot up sequencing. The device provides a wide range of protection features, including brown-out, over temperature, over voltage, and under voltage protection.

The operating principle of NCP1398BDR2G is based on peak current-mode control. Integrated high side and floating low-side MOSFETs allow for a wide input voltage operation range of up to 16.5V. The regulator has two normalized channels, namely Reverse Current-Mode (RCM) and Voltage Mode control (VMC). The RCM provides overshoot and droop compensation, while the VMC is used to adjust the duty cycle directly. This setup provides a precise control of output voltage.

The device also offers integrated continuous-current mode for accurate current limit without fast loop compensation, thereby reducing the amount of external components required. A single ENABLE pin enables and disables the device, conserving power when the device is powered off. Lastly, a BOOT pin allows for soft-start operation.

In conclusion, NCP1398BDR2G is a high-performance, low-cost synchronous buck regulator with integrated high-side and floating low-side MOSFETs that can be used in off-line power conversion applications up to 16.5V. The device’s peak current-mode control provides a precise control of output voltage and it requires minimal external components. Furthermore, the device has a wide range of protection features, making it suitable for a variety of applications.