L5963U-KBT

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Introduction

L5963U-KBT is a voltage regulator IC series from STMicroelectronics, designed for PC notebooks and Automotive applications. This series of ICs are ideal for voltage regulation in a host of different environments and provides excellent performance and low noise operation. The L5963U-KBT series of ICs offer high efficiency and various protection functions for efficient power supply design for PC notebooks and automotive applications, powered by modern processors.

Application Fields

The L5963U-KBT voltage regulator series finds application in a wide array of power supply designs including those common to PC notebooks, automotive, industrial and medical applications. It is a highly integrated, versatile and cost-effective solution offering the designers an ideal platform for low power and space saving power supply design.

This series of voltage regulator ICs are compliant with the industry standard features required by most PC notebooks and automotive designs. Thus, it is ideal for all notebook and automotive power supply designs, ranging from high current, high power to low current, low power applications.

The advanced, interactive protection features such as overvoltage protection, undervoltage protection, overcurrent protection, short-circuit protection, and thermal shutdown make it an ideal choice for PC notebook and automotive applications.

Working Principle

The L5963U-KBT series of ICs utilizes a wide switching range for power supply design, extending from 3V to 22V. This regulator also offers three types of selectable operating mode, namely, unregulated and fixed output voltage, adaptive output voltage and adjustable output voltage. It also features a high efficiency, low ripple and low noise performance, resulting in an extremely high output voltage accuracy and electrical stability.

The regulator is based on a bulk capacitive power regulation principle, one widely employed in modern notebook and automotive electronic power supplies. The power regulator IC includes an internal voltage reference, two pulse width modulation (PWM) regulators and two variable frequency pulse-width modulation (VF) regulators. In addition, the IC also includes an adjustable output voltage range, which can provide a stable voltage at the output, even when the input voltage drops below the rating. The IC also has an internal linear output regulation circuit, which can be set by the designer to provide a stable output voltage.

The IC also offers a selectable mode for low power or light load operation, enabling the designer to adjust the switching frequency of the pulse-width modulation (PWM) and VF regulators for improved efficiency and low power consumption. Furthermore, the IC also provides several undervoltage, overvoltage, overcurrent and short-circuit protections which are essential for PC notebook and automotive applications.

Conclusion

The L5963U-KBT series of ICs constitute a highly integrated, feature-rich and cost effective power regulator solution for PC notebook and automotive power supply design. This series offers advanced features such as wide switching range, adjustable output voltage, adjustable frequency and voltage references, and protection for overvoltage, undervoltage, overcurrent, and short-circuit conditions. This modern and versatile regulating solution ensures high current, high power and low current, low power operations with excellent performance and low noise operation.

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