LX7157BCLD

PMIC - Voltage Regulators - DC DC Switching Regulators

The LX7157BCLD is a non-synchronous buck switching regulator that features a wide input voltage range of 4.3V to 28.5V, allowing it to be used in a wide range of applications. It provides a wide range of output voltage options and offers many features designed to improve efficiency and reliability while reducing system cost. This makes it ideal for use in automotive, industrial, and consumer applications.

Application Field

The LX7157BCLD can be used in a variety of applications, including automotive, industrial, communications, consumer electronics, medical, and LED lighting. In automotive applications, its wide input voltage range allows it to support both 12V and 24V systems. Its output voltage range of 0.8V-22V makes it suitable for a variety of automotive systems, such as battery management systems, powertrain systems, light control systems, and automotive communication networks. In industrial applications, it can be used to supply power to a variety of sensors, automotive control systems, and communication networks. In consumer electronics applications, its wide input voltage range and efficient power conversion make it an ideal choice for high-current, high-efficiency power supplies.

Working Principle

The LX7157BCLD is a non-synchronous buck switching regulator that operates on a two-phase buck architecture. It consists of two buck switches connected in parallel, and each of them is controlled by a separate PWM input. This allows the LX7157BCLD to achieve high efficiency, along with better transient response and ripple rejection compared to single-phase regulators. Furthermore, the PWM input enables the output voltage to be dynamically adjusted, allowing better flexibility and control.

The LX7157BCLD operates on a two-phase buck architecture and utilizes a PWM input to control each of the two buck switches. The PWM inputs control the on- and off-time of the two buck switches to control the output voltage level. The output voltage is determined by the total voltage of the sum of the two buck switches and is regulated by comparing the output voltage with the error amplifier reference voltage.

The LX7157BCLD IC also offers a variety of features that improve efficiency and reliability. For example, it includes cycle-by-cycle current limit, over temperature protection and voltage foldback, as well as spread spectrum frequency modulation to reduce EMI.

Conclusion

The LX7157BCLD is a non-synchronous buck switching regulator that offers high efficiency, excellent performance, and robust features in automotive, industrial, and consumer applications. Its wide input voltage range and output voltage range, along with its advanced features, make it an ideal choice for these applications.